[ { "id": "authors:eetpt-80303", "collection": "authors", "collection_id": "eetpt-80303", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20191121-133313705", "type": "book_section", "title": "Controlling surface acoustic waves via magnetically-modulated contact resonances", "book_title": "2019 Thirteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials)", "author": [ { "family_name": "Palermo", "given_name": "A.", "orcid": "0000-0001-9431-0461", "clpid": "Palermo-A" }, { "family_name": "Wang", "given_name": "Y.", "clpid": "Wang-Y" }, { "family_name": "Cellia", "given_name": "P.", "clpid": "Cellia-P" }, { "family_name": "Daraio", "given_name": "C.", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "abstract": "We present a tabletop-scale realization of a tunable metamaterial platform to control surface acoustic waves (SAWs). The platform comprises an array of ferromagnetic beads controlled with permanent magnets, arranged atop an elastic substrate. We demonstrate the possibility of shifting the beads resonances and, in turn, tuning the SAWs bandgaps.", "doi": "10.1109/MetaMaterials.2019.8900928", "isbn": "978-1-7281-0477-5", "publisher": "IEEE", "place_of_publication": "Piscataway, NJ", "publication_date": "2019-09", "pages": "287-289" }, { "id": "authors:2re6r-j4r53", "collection": "authors", "collection_id": "2re6r-j4r53", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190724-153112027", "type": "book_section", "title": "Mechanical modeling of the bandgap response of tensegrity metamaterials", "book_title": "International Conference of Numerical Analysis and Applied Mathematics", "author": [ { "family_name": "Amendola", "given_name": "Ada", "orcid": "0000-0002-2562-881X", "clpid": "Amendola-A" }, { "family_name": "Krushynska", "given_name": "Anastasiia", "orcid": "0000-0003-3259-2592", "clpid": "Krushynska-A" }, { "family_name": "De Piano", "given_name": "Mariella", "clpid": "De-Piano-M" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" }, { "family_name": "Pugno", "given_name": "Nicola M.", "orcid": "0000-0003-2136-2396", "clpid": "Pugno-N-M" }, { "family_name": "Fraternali", "given_name": "Fernando", "orcid": "0000-0002-7549-6405", "clpid": "Fraternali-F" } ], "contributor": [ { "family_name": "Simos", "given_name": "Theodore", "clpid": "Simos-T" }, { "family_name": "Tsitouras", "given_name": "Charalambos", "clpid": "Tsitouras-C" } ], "abstract": "We investigate the acoustic band structure of tensegrity mass-spring chains as a function of the applied, local and global states of prestress. We first study the bandgap response of linear monoatomic chains, which show lumped masses connected to tensegrity prisms acting as mechanical springs. Next, we present a numerical study on the nonlinear wave dynamics of the examined systems in the geometrically nonlinear regime that is induced by the presence of moderately large relative displacements between the lumped masses. Such a study confirms the results of the linear analysis in the case of an elastically hardening system.", "doi": "10.1063/1.5114261", "isbn": "978-0-7354-1854-7", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2019-07-24", "pages": "Art. No. 260010" }, { "id": "authors:wpgz6-2w738", "collection": "authors", "collection_id": "wpgz6-2w738", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190606-072050998", "type": "book_section", "title": "Resonant metabarriers as seismic attenuators in granular media", "book_title": "Proceedings of International Conference on Noise and Vibration Engineering (ISMA2018) / International Conference on Uncertainty in Structural Dynamics (USD2018)", "author": [ { "family_name": "Zaccherini", "given_name": "R.", "clpid": "Zaccherini-R" }, { "family_name": "Palermo", "given_name": "A.", "orcid": "0000-0001-9431-0461", "clpid": "Palermo-A" }, { "family_name": "Kr\u00f6del", "given_name": "S.", "orcid": "0000-0002-9218-8578", "clpid": "Kr\u00f6del-S" }, { "family_name": "Dertimanis", "given_name": "V. K.", "clpid": "Dertimanis-V-K" }, { "family_name": "Marzani", "given_name": "A.", "clpid": "Marzani-A" }, { "family_name": "Daraio", "given_name": "C.", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" }, { "family_name": "Chatzi", "given_name": "E. N.", "clpid": "Chatzi-E-N" } ], "contributor": [ { "family_name": "Desmet", "given_name": "W.", "clpid": "Desmet-W" }, { "family_name": "Pluymers", "given_name": "B.", "clpid": "Pluymers-B" }, { "family_name": "Moens", "given_name": "D.", "clpid": "Moens-D" }, { "family_name": "Rottiers", "given_name": "W.", "clpid": "Rottiers-W" } ], "abstract": "Arrays of surface resonators forming so-called metabarriers are capable of converting seismic Rayleigh waves into less dangerous shear waves traveling in the bulk, attenuating the ground motion at the surface. However, this phenomenon pertains to resonant materials inserted in homogeneous media which feature properties rather different to those of natural soils. In this work, we experimentally investigate the ability of a resonant metabarrier embedded below the surface of an inhomogenous medium, i.e. a granular unconsolidated material, to attenuate the incoming surface waves. Although unable to diverge their propagation into the bulk, we find that surface resonators in granular media achieve attenuation of Rayleigh waves by up to 50 % around their resonant frequency. The findings can be used as a starting point for future real-scale implementations for seismic protection systems in stratified soils presenting an inhomogeneous stiffness profile at the seismic Rayleigh waves scale.", "isbn": "978-90-73802-99-5", "publisher": "Katholieke Universiteit Leuven", "place_of_publication": "Heverlee, Belgium", "publication_date": "2018-09", "pages": "3047-3057" }, { "id": "authors:pqf23-rac87", "collection": "authors", "collection_id": "pqf23-rac87", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20181127-074145554", "type": "book_section", "title": "Tunable extremely wide low-frequency band gaps in accordion-like metamaterials", "book_title": "2018 12th International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials)", "author": [ { "family_name": "Krushynska", "given_name": "A. O.", "orcid": "0000-0003-3259-2592", "clpid": "Krushynska-A-O" }, { "family_name": "Amendola", "given_name": "A.", "orcid": "0000-0002-2562-881X", "clpid": "Amendola-A" }, { "family_name": "Bosia", "given_name": "F.", "orcid": "0000-0002-2886-4519", "clpid": "Bosia-F" }, { "family_name": "Daraio", "given_name": "C.", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" }, { "family_name": "Pugno", "given_name": "N. M.", "orcid": "0000-0003-2136-2396", "clpid": "Pugno-N-M" }, { "family_name": "Fraternali", "given_name": "F.", "orcid": "0000-0002-7549-6405", "clpid": "Fraternali-F" } ], "abstract": "To achieve wave control at broad-band ultra-low frequencies, we design \"accordion-like\" meta-structures by periodically alternating tensegrity prisms with solid disks. The structures are characterized by extremely wide band gaps, which can be tuned by varying the level of prestress in the constituent elements. They provide valid alternatives to other metamaterials with low-frequency performance, the functionality of which relies on a locally resonant mechanism, by overcoming an inherent limit of narrow operating frequency ranges and demonstrating the resilience to variations in geometric and material parameters.", "doi": "10.1109/MetaMaterials.2018.8534115", "isbn": "978-1-5386-4702-8", "publisher": "IEEE", "place_of_publication": "Piscataway, NJ", "publication_date": "2018-09", "pages": "237-239" }, { "id": "authors:dn7be-cp618", "collection": "authors", "collection_id": "dn7be-cp618", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180215-140456213", "type": "book_section", "title": "Non-Reciprocity in Structures With Nonlinear Internal Hierarchy and Asymmetry", "book_title": "ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference", "author": [ { "family_name": "Fronk", "given_name": "Matthew D.", "clpid": "Fronk-M-D" }, { "family_name": "Tawfick", "given_name": "Sameh", "clpid": "Tawfick-S" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" }, { "family_name": "Vakakis", "given_name": "Alexander F.", "clpid": "Vakakis-A-F" }, { "family_name": "Leamy", "given_name": "Michael J.", "clpid": "Leamy-M-J" } ], "abstract": "Acoustic reciprocity is a property of linear, time invariant systems in which the locations of the source of a forcing and the received signal can be interchanged with no change in the measured response. This work investigates the breaking of acoustic reciprocity using a hierarchical structure consisting of internally-scaled masses coupled with cubically nonlinear springs. Using both direct results and variable transformations of numerical simulations, energy transmission is shown to occur in the direction of decreasing scale but not vice versa, constituting the breaking of acoustic reciprocity locally. When a linear spring connects the smallest scale of such a structure to the largest scale of another identical structure, an asymmetrical lattice is formed. Because of the scale mixing and transient resonance capture that occurs within each unit cell, it is demonstrated through further numerical experiments that energy transmission occurs primarily in the direction associated with the nonlinear coupling from the large to the small scale, thus signifying the breaking of reciprocity globally. This nonlinear hierarchical structure exhibits strong amplitude-dependency in which reciprocity-breaking is associated with specific ranges of excitation amplitudes for both impulse and harmonic forcing.", "doi": "10.1115/DETC2017-67965", "isbn": "978-0-7918-5822-6", "publisher": "American Society of Mechanical Engineers", "place_of_publication": "New York, NY", "publication_date": "2017-08", "pages": "Art. No. V008T12A023" }, { "id": "authors:nt2jf-jf373", "collection": "authors", "collection_id": "nt2jf-jf373", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160812-075217608", "type": "book_section", "title": "Tensile Properties of Inkjet 3D Printed Parts: Critical Process Parameters and Their Efficient Analysis", "book_title": "35th Computers and Information in Engineering Conference", "author": [ { "family_name": "Mueller", "given_name": "Jochen", "orcid": "0000-0002-4808-2223", "clpid": "Mueller-Jochen" }, { "family_name": "Kim", "given_name": "Shi En", "clpid": "Kim-Shi-En" }, { "family_name": "Shea", "given_name": "Kristina", "orcid": "0000-0003-3921-2214", "clpid": "Shea-Kristina" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "abstract": "To design and optimize for capabilities of additive manufacturing processes it is also necessary to understand and model their variations in geometric and mechanical properties. In this paper, such variations of inkjet 3D printed parts are systematically investigated by analyzing parameters of the whole process, i.e. storage of the material, printing, testing, and storage of finished parts. The goal is to both understand the process and determine the parameters that lead to the best mechanical properties and the most accurate geometric properties. Using models based on this understanding, we can design and optimize parts, and fabricate and test them successfully, thus closing the loop. Since AM materials change rapidly and this process will have to be repeated, it is shown how to create a cost and time efficient experimental design with the one-factor-at-a-time and design of experiments methods, yielding high statistical accuracies for both main and interaction effects. The results show that the number of intersections between layers and nozzles along the load-direction has the strongest impact on the mechanical properties followed by the UV exposure time, which is investigated by part spacing, the position on the printing table and the expiry date of the material. Minor effects are found for the storage time and the surface roughness is not affected by any factor. Nozzle blockage, which leads to a smaller flow-rate of printing material, significantly affected the width and waviness of the printed product. Furthermore, the machine's warm-up time is found to be an important factor.", "doi": "10.1115/DETC2015-48024", "isbn": "978-0-7918-5704-5", "publisher": "American Society of Mechanical Engineers", "place_of_publication": "New York, NY", "publication_date": "2015-08", "pages": "Art. No. V01AT02A040" }, { "id": "authors:r7dn7-8gc26", "collection": "authors", "collection_id": "r7dn7-8gc26", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160303-151759634", "type": "book_section", "title": "Fabrication and Characterization of Bi-metallic, Structured Films with Ultra-low Thermal Expansion", "book_title": "Experimental Mechanics of Composite, Hybrid, and Multifunctional Materials", "author": [ { "family_name": "Yamamoto", "given_name": "Namiko", "clpid": "Yamamoto-Namiko" }, { "family_name": "Gdoutos", "given_name": "Eleftherios", "clpid": "Gdoutos-E" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "contributor": [ { "family_name": "Tandon", "given_name": "G. P.", "clpid": "Tandon-G-P" }, { "family_name": "Tekalur", "given_name": "Srinivasan Arjun", "clpid": "Tekalur-S-A" }, { "family_name": "Ralph", "given_name": "Carter", "clpid": "Ralph-C" }, { "family_name": "Sottos", "given_name": "Nancy R.", "clpid": "Sottos-N-R" }, { "family_name": "Blaiszik", "given_name": "Benjamin", "clpid": "Blaiszik-B" } ], "abstract": "We fabricate and characterize bi-metallic structured thin films (~1 um thick) with ultra-low effective coefficient of thermal expansion (CTE). The films consist of a periodic array of aluminum (Al) hexagonal plates attached to a titanium (Ti) frame. In this designed discontinuous geometry, the self-standing films present ultra-low effective CTE through local release of the thermal strains by relative rotation of the lattice elements. We fabricated this structured film by a combination of conventional micro-fabrication process steps, and we measured its CTE as ultra-low (\u22120.6 \u00d7 10^(\u22126)/\u00b0C) using 3D digital image correlation. This new thin film can lead to the creation of low-cost, adaptive structures that operate in extreme thermal environments, such as reflective layers for space telescopes.", "doi": "10.1007/978-3-319-00873-8_11", "isbn": "978-3-319-00872-1", "publication_date": "2014", "pages": "85-88" }, { "id": "authors:zgj85-qsk87", "collection": "authors", "collection_id": "zgj85-qsk87", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170705-153021095", "type": "book_section", "title": "Site-Specific Diagnostic Evaluation of Hard Biological Tissues Using Solitary Waves", "book_title": "Mechanics of Biological Systems and Materials", "author": [ { "family_name": "Yang", "given_name": "Jinkyu", "clpid": "Yang-Jinkyu" }, { "family_name": "Sangiorgio", "given_name": "Sophia N.", "clpid": "Sangiorgio-S-N" }, { "family_name": "Borkowski", "given_name": "Sean L.", "clpid": "Borkowski-S-L" }, { "family_name": "Ebramzadeh", "given_name": "Edward", "clpid": "Ebramzadeh-E" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "contributor": [ { "family_name": "Barthelat", "given_name": "Fran\u00e7ois", "clpid": "Barthelat-F" }, { "family_name": "Zavattieri", "given_name": "Pablo", "clpid": "Zavattieri-P" }, { "family_name": "Korach", "given_name": "Chad S.", "clpid": "Korach-C-S" }, { "family_name": "Prorok", "given_name": "Barton C.", "clpid": "Prorok-B-C" }, { "family_name": "Grande-Allen", "given_name": "K. Jane", "clpid": "Grande-Allen-K-J" } ], "abstract": "We perform site-specific diagnostic evaluation of hard biological tissues via highly nonlinear solitary waves. Solitary waves are compact-supported tunable pulses with extremely high energy density, which can be efficiently formed in a chain of ordered granular particles defined as 1D granular crystals. We transmit a single pulse of solitary waves into specific areas of artificial biological systems via direct mechanical contact with a granular crystal sensor. We then record the solitary waves backscattered from a targeted bone area to assess its mechanical stiffness. By taking advantage of the coupling between nonlinear granular media and biological systems, we demonstrate that reflected solitary waves are highly sensitive to site-specific mechanical properties of hard biological tissues. The efficacy of the diagnostic approach is investigated by comparing the stiffness measurements with nominal elastic moduli of polyurethane foams that mimic osteoporotic bone. We also perform numerical investigations via a discrete element (DE) model, simulating propagation and attenuation of solitary waves at the interfaces. The site-specific evaluation technique via solitary waves has the potential for clinical applications, such as assisting appropriate intraoperative decision during joint replacement or spinal surgery for better surgical outcome.", "doi": "10.1007/978-3-319-00777-9_27", "isbn": "978-3-319-00776-2", "publisher": "Springer", "place_of_publication": "Cham", "publication_date": "2013-07-21", "pages": "185-189" }, { "id": "authors:86k94-p3449", "collection": "authors", "collection_id": "86k94-p3449", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20160303-152113967", "type": "book_section", "title": "Engineered thin films with ultra-low thermal expansion coefficient for deployable or deformable space structures", "book_title": "54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference", "author": [ { "family_name": "Yamamoto", "given_name": "Namiko", "clpid": "Yamamoto-Namiko" }, { "family_name": "Gdoutos", "given_name": "Eleftherios", "clpid": "Gdoutos-E" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "abstract": "We developed micro-structured thin films with ultra-low coefficient of thermal expansion. These low-weight, flexible, thermally stable films are expected to be a useful tool in aerospace applications, for example, as a reflective layers of deformable space telescope mirrors. The low-CTE films are composed of a Ti frame supporting hexagonal Al plates arranged in a two-dimensional periodic lattice. The effective CTE of these materials can be controlled by selecting the appropriate constitutent material properties of the frame and plates, and the geometry of the lattice. Aluminum and titanium were selected as constituent materials to create thin films with a CTE close to zero. The 2D bi-metallic lattice was microfabricated, and characterized for its thermal and optical functionalities. The effective CTE was confirmed to be ultra-low (-0.6\u00d710^(-6)/\u00b0C), and the imaging capability of this metallic layer was evaluated in the range of temperature from room temperature to 150 \u00b0C.", "doi": "10.2514/6.2013-1789", "isbn": "978-1-62410-223-3", "publisher": "American Institute of Aeronautics and Astronautics", "place_of_publication": "Reston, VA", "publication_date": "2013-04", "pages": "Art. No. 2013-1789" }, { "id": "authors:f3nsy-e9206", "collection": "authors", "collection_id": "f3nsy-e9206", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161004-145741664", "type": "book_section", "title": "Nonlinear Periodic Phononic Structures and Granular Crystals", "book_title": "Acoustic Metamaterials and Phononic Crystals", "author": [ { "family_name": "Theocharis", "given_name": "G.", "clpid": "Theocharis-G" }, { "family_name": "Boechler", "given_name": "N.", "clpid": "Boechler-N" }, { "family_name": "Daraio", "given_name": "C.", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "contributor": [ { "family_name": "Deymier", "given_name": "Pierre A.", "clpid": "Deymier-P-A" } ], "abstract": "This chapter describes the dynamic behavior of nonlinear periodic phononic structures, along with how such structures can be utilized to affect the propagation of mechanical waves. Granular crystals are one type of nonlinear periodic phononic structure and are the focus of this chapter. The chapter begins with a brief history of nonlinear lattices and an introduction to granular crystals. This is followed by a summary of past and recent work on one-dimensional (1D) and two-dimensional (2D) granular crystals, which is categorized according to the crystals' periodicity and dynamical regime. The chapter is concluded with a commentary by the authors, which discusses several possible future directions relating to granular crystals and other nonlinear periodic phononic structures. Throughout this chapter, a richness of nonlinear dynamic effects that occur in granular crystals is revealed, including a plethora of phenomena with no linear analog such as solitary waves, discrete breathers, tunable frequency band gaps, bifurcations, and chaos. Furthermore, in addition to the description of fundamental nonlinear phenomena, the authors describe how such phenomena can enable novel engineering devices and be applied to other nonlinear periodic systems.", "doi": "10.1007/978-3-642-31232-8_7", "isbn": "978-3-642-31231-1", "publisher": "Springer", "place_of_publication": "New York, NY", "publication_date": "2012-10-19", "pages": "217-251" }, { "id": "authors:5qk0g-jn531", "collection": "authors", "collection_id": "5qk0g-jn531", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200518-122714162", "type": "book_section", "title": "Experimental Testing of Micro-Particles Collision", "book_title": "Dynamic Behavior of Materials", "author": [ { "family_name": "Lin", "given_name": "Wei-Hsun", "clpid": "Lin-Wei-Hsun" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "contributor": [ { "family_name": "Chalivendra", "given_name": "Vijaya", "clpid": "Chalivendra-V-B" }, { "family_name": "Song", "given_name": "Bo", "clpid": "Song-Bo" }, { "family_name": "Casem", "given_name": "Daniel", "clpid": "Casem-D" } ], "abstract": "We performed experiments on the collisions of micrometer scale (200\u2013300 \u03bcm) stainless steel (316 and 440 C) particles and studied the interaction properties and the coefficient of restitution. We used a novel experimental apparatus to enable non-contact measurements based on laser excitations/detection and high-speed photography. The colliding particles were aligned in v-shaped grooves on a silicon wafer, fabricated using anisotropic etching techniques. We used high-power lasers to excite one of the particles (striker), and to control the impact velocity with high repeatability. The motion of the striker particle was triggered by partial laser ablation of its surface. The displacements of the particles involved in the collision were recorded with a high-speed camera mounted on an optical microscope. The particle velocities were obtained from the recorded images using digital image correlation. We calibrated the setup by tracking the dynamic excitation of single particles, and tested collisions between two particles. This study introduces a new experimental approach to understand the fundamental dynamic response of micro-particle collisions, and to test the limits of validity of the Hertzian interaction law.", "doi": "10.1007/978-1-4614-4238-7_61", "isbn": "978-1-4614-4237-0", "publisher": "Springer", "place_of_publication": "New York, NY", "publication_date": "2012-09-13", "pages": "475-480" }, { "id": "authors:eggg1-r7195", "collection": "authors", "collection_id": "eggg1-r7195", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20200519-135320125", "type": "book_section", "title": "Dynamics of Multilayered Structures of VACNTs with Metallic Inter-layers", "book_title": "Dynamic Behavior of Materials", "author": [ { "family_name": "Thevamaran", "given_name": "Ramathasan", "orcid": "0000-0001-5058-6167", "clpid": "Thevamaran-R" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "contributor": [ { "family_name": "Chalivendra", "given_name": "Vijaya", "clpid": "Chalivendra-V-B" }, { "family_name": "Song", "given_name": "Bo", "clpid": "Song-Bo" }, { "family_name": "Casem", "given_name": "Daniel", "clpid": "Casem-D" } ], "abstract": "We study the dynamic behavior of periodic multilayered structures composed of compliant freestanding vertically aligned carbon nanotube (VACNT) arrays alternating with rigid metallic inter-layers, subjected to small transient excitations. The presence of intrinsically nonlinear effects in VACNTs arrays enable us to create materials and structures with tunable properties in which, for example, the stiffness can be tuned over a large range. As a result, the dynamic stress propagation properties in these materials can be tailored to specific applications.", "doi": "10.1007/978-1-4614-4238-7_59", "isbn": "978-1-4614-4237-0", "publisher": "Springer", "place_of_publication": "New York, NY", "publication_date": "2012-09-13", "pages": "463-465" }, { "id": "authors:jz1p3-ara37", "collection": "authors", "collection_id": "jz1p3-ara37", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190826-092412704", "type": "book_section", "title": "Dynamic Behavior of Periodic Structures Consisting of Vertically Aligned Carbon Nanotubes and Rigid Interlayers", "book_title": "53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference", "author": [ { "family_name": "Yamamoto", "given_name": "Namiko", "clpid": "Yamamoto-Namiko" }, { "family_name": "Thevamaran", "given_name": "Ramathasan", "orcid": "0000-0001-5058-6167", "clpid": "Thevamaran-R" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "abstract": "We assembled novel periodic structures by alternating aligned carbon nanotube (CNT) discs and polycarbonate cylindrical particles for stress damping applications. CNTs are known to present a nonlinear, hysteretic mechanical behavior in compression with the ability to recover from large strains. Furthermore, CNTs are generally more lightweight and thermally stable than currently existing viscoelastic polymers. We test the dynamic response of these CNT/polycarbonate multilayer systems excited by an impact. The response of these systems is found to be highly nonlinear and tunable by variation of the static precompression applied. We studied the wave propagation properties and dissipation in these systems and found that the presence of CNTs improves the energy damping properties of the system when compared with the one observed in polycarbonate particles alone. Such improvement was higher with smaller precompression loads. More detailed studies are required to understand the origin of the observed dynamic behavior.", "doi": "10.2514/6.2012-1389", "isbn": "9781600869372", "publisher": "American Institute of Aeronautics and Astronautics", "place_of_publication": "Reston, VA", "publication_date": "2012-04-23", "pages": "Art. No. 2012-1389" }, { "id": "authors:e3zba-v9y22", "collection": "authors", "collection_id": "e3zba-v9y22", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20120606-154003951", "type": "book_section", "title": "Investigation of co-travelling solitary wave collisions in a granular chain", "book_title": "Smart sensor phenomena, technology, networks, and systems", "author": [ { "family_name": "Anzel", "given_name": "Paul", "clpid": "Anzel-P" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "contributor": [ { "family_name": "Matikas", "given_name": "Theodore E.", "clpid": "Matikas-T-E" }, { "family_name": "Peters", "given_name": "Kara J.", "clpid": "Peters-K-J" }, { "family_name": "Ecke", "given_name": "Wolfgang", "clpid": "Ecke-W" } ], "abstract": "We present investigations into the collision of co-travelling solitary waves in a granular chain. Impulses are injected into the system by means of a piezo stack and the results are compared to a numerical model of discrete masses connected by non-linear springs. Similar to other solitary wave-carrying systems, a phase shift in both interacting solitary waves is observed due to their collision. Additionally, the formation of small secondary waves is observed in both numerical and experimental results. Insight into solitary wave interactions will be important for high-frequency excitation of a granular crystal, which may allow for improved Non-Destructive Evaluation (NDE) and Structural Health Monitoring (SHM) methods.", "doi": "10.1117/12.917474", "isbn": "978-0-8194-9003-2", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_publication": "Bellingham, WA", "publication_date": "2012-03-30", "pages": "Art. No. 83460G" }, { "id": "authors:1t4pd-ecv12", "collection": "authors", "collection_id": "1t4pd-ecv12", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20130814-105941438", "type": "book_section", "title": "Angular Dependence of Highly Nonlinear Pulse Splitting in a Two Dimensional Granular Network", "book_title": "2010 Proceedings of the ASME International Mechanical Engineering Congress and Exposition", "author": [ { "family_name": "Ngo", "given_name": "D.", "clpid": "Ngo-Duc" }, { "family_name": "Fraternali", "given_name": "F.", "orcid": "0000-0002-7549-6405", "clpid": "Fraternali-F" }, { "family_name": "Daraio", "given_name": "C.", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "abstract": "We investigate experimentally and numerically the\npropagation of highly nonlinear signals in a branched two-dimensional\ngranular system composed by chains of uniform\nspherical beads. The system consists of a Y-shaped guide with\nvarious branch angles in which stainless steel spheres are\narranged. We study the dynamic behavior of a solitary pulse\ncrossing the bifurcated interface, and splitting between the two\nbranches. We report for the first time the dependence of the\nsplit pulses' speed on the branch angles. Numerical simulations\nbased on Hertzian interaction between the particles are found in\nagreement with the experimental data.", "doi": "10.1115/IMECE2010-39599", "isbn": "978-0-7918-4446-5", "publisher": "American Society of Mechanical Engineers", "place_of_publication": "New York, NY", "publication_date": "2012", "pages": "361-366" }, { "id": "authors:gpa8t-y6346", "collection": "authors", "collection_id": "gpa8t-y6346", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161003-123235426", "type": "book_section", "title": "Synthesis and Patterning Methods for Nanostructures Useful for Biological Applications", "book_title": "Nanotechnology for Biology and Medicine: At the Building Block Level", "author": [ { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" }, { "family_name": "Jin", "given_name": "Sungho", "clpid": "Jin-Sungho" } ], "contributor": [ { "family_name": "Silva", "given_name": "Gabriel A.", "clpid": "Silva-G-A" }, { "family_name": "Parpura", "given_name": "Vladimir", "clpid": "Parpura-V" } ], "abstract": "The importance and benefits of nanotechnology in biology and medicine are now well-recognized by scientists, technologists, as well as various governmental and private research funding agencies. The basis that enables the application of nanotechnology is the availability of nanostructured materials. Therefore, it is essential to provide an insight on the state-of-the-art methods to manufacture various nanostructures.", "doi": "10.1007/978-0-387-31296-5_2", "isbn": "978-0-387-31282-8", "publisher": "Springer", "place_of_publication": "New York, NY", "publication_date": "2011-09-05", "pages": "27-44" }, { "id": "authors:3g24f-22w24", "collection": "authors", "collection_id": "3g24f-22w24", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161005-071423962", "type": "book_section", "title": "Tailoring Stress Waves in 2-D Highly Nonlinear Granular Crystals: Simulations and Experiments", "author": [ { "family_name": "Leonard", "given_name": "Andrea", "clpid": "Leonard-Andrea-B" }, { "family_name": "Awasthi", "given_name": "Amnaya", "clpid": "Awasthi-A" }, { "family_name": "Geubelle", "given_name": "Philippe", "clpid": "Geubelle-P" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "abstract": "We study the propagation of elastic stress waves in two-dimensional highly nonlin-ear granular crystals composed of square packings of spheres with and without cylindrical intruders, via experiments and numerical simulations. By varying the intruder material, we show the ability to alter the propagating wave front characteristics. Experiments agree well with dis-crete particle simulations.", "publisher": "Caltech Library", "publication_date": "2011-06" }, { "id": "authors:vnf5a-te490", "collection": "authors", "collection_id": "vnf5a-te490", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161004-155606386", "type": "book_section", "title": "Experimental and Numerical Study of Wave Propagation in Granular Media", "book_title": "Dynamic Behavior of Materials", "author": [ { "family_name": "On", "given_name": "T.", "clpid": "On-T" }, { "family_name": "Smith", "given_name": "K. J.", "clpid": "Smith-K-J" }, { "family_name": "Geubelle", "given_name": "P. H.", "clpid": "Geubelle-P-H" }, { "family_name": "Lambros", "given_name": "J.", "clpid": "Lambros-J" }, { "family_name": "Spadoni", "given_name": "A.", "clpid": "Spadoni-A" }, { "family_name": "Daraio", "given_name": "C.", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "contributor": [ { "family_name": "Proulx", "given_name": "Tom", "clpid": "Proulx-T" } ], "abstract": "One dimensional stress waves travelling in granular chains exhibit interesting characteristics such as filtering, tunability and wave mitigation because on the formation of solitary waves, and solitary wave trains, within them. An idealized one dimensional granular medium, consisting of a linear array of contacting spherical brass beads, was loaded dynamically in a modified split Hopkinson pressure bar, with loading pulses that span a variety of rates and profiles using pulse shaping techniques. Different chain lengths were studied to determine how solitary waves form in a varying length granular medium, as well as the speed of wave propagation. It is found that the wave speed propagates faster for longer chains of brass beads. The high loading rates of the Hopkinson bar also allowed us to investigate plastic dissipation effects in the granular chain when composed of different types of metals. To further our understanding of wave propagation in ductile ordered granular media, the experimental results are compared with companion numerical simulations based on a particle contact law that accounts for plastic dissipation. Knowing the behavior of a stress wave propagating through such materials can lead to arrangements that can produce desired stress wave mitigation characteristics as the waves travel through the granular chain.", "doi": "10.1007/978-1-4614-0216-9_13", "isbn": "978-1-4614-0215-2", "publisher": "Springer", "place_of_publication": "New York, NY", "publication_date": "2011-05-18", "pages": "95-98" }, { "id": "authors:rwsq3-cqw85", "collection": "authors", "collection_id": "rwsq3-cqw85", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110524-092212206", "type": "book_section", "title": "Analytical and Experimental Analysis of Bandgaps in Nonlinear one Dimensional Periodic Structures", "book_title": "IUTAM Symposium on Recent Advances of Acoustic Waves in Solids", "author": [ { "family_name": "Boechler", "given_name": "Nicholas", "clpid": "Boechler-N" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" }, { "family_name": "Narisetti", "given_name": "Raj K.", "clpid": "Narisetti-R-K" }, { "family_name": "Ruzzene", "given_name": "M.", "orcid": "0000-0002-1502-2160", "clpid": "Ruzzene-M" }, { "family_name": "Leamy", "given_name": "M. J.", "clpid": "Leamy-M-J" } ], "contributor": [ { "family_name": "Wu", "given_name": "Tsung-Tsong", "clpid": "Wu-Tsung-Tsong" }, { "family_name": "Ma", "given_name": "Chien-Ching", "clpid": "Ma-Chien-Ching" } ], "abstract": "Wave propagation characteristics of nonlinear one-dimensional periodic structures are investigated analytically, numerically and experimentally. A novel perturbation analysis is first applied to predict the band gap location and extent in terms of linear and nonlinear system parameters. Approximate closed-form expressions capture the effect of nonlinearities on dispersion and depict amplitude dependent cut-off frequencies. The predictions from the perturbation analysis are verified through numerical simulations of harmonic wave motion. Results indicate the possibility of input amplitude as a tuning parameter through which cut-off frequencies can be adjusted to achieve filtering properties over selected frequency ranges. A periodic diatomic chain of stainless steel spheres alternating with aluminium spheres is experimentally investigated. The dynamic behavior of the chain is governed by Hertzian interaction of spheres and by a compressive pre-load which can be adjusted to obtain linear, weakly nonlinear and highly nonlinear behavior. For a weakly nonlinear case, preliminary results in experiments show the tendency for a shift in the band gap edges by varying input amplitude. The paper is a work in progress, for which the experimental results for a weakly nonlinear system are interpreted by the perturbation analysis developed for a specific case of linear and nonlinear power law interaction of exponent 3/2.", "doi": "10.1007/978-90-481-9893-1_20", "isbn": "978-90-481-9892-4", "publisher": "Springer", "place_of_publication": "Dordrecht", "publication_date": "2010", "pages": "209-219" }, { "id": "authors:wg1vr-jbz69", "collection": "authors", "collection_id": "wg1vr-jbz69", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161004-080808608", "type": "book_section", "title": "Vibration Isolation via Linear and Nonlinear Periodic Devices", "book_title": "22nd Biennial Conference on Mechanical Vibration and Noise, Parts A and B", "author": [ { "family_name": "Spadoni", "given_name": "A.", "clpid": "Spadoni-A" }, { "family_name": "Daraio", "given_name": "C.", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "abstract": "The current manuscripts deals with the design of passive mechanical filters for vibration attenuation a low frequencies. Traditionally, this has been addressed employing dissipation as the attenuation mechanism. While such strategy provides broad-frequency effectiveness, attenuation at any given frequency is modest. Mass and stiffness-modulated periodic systems, on the other hand, exploit dispersion as the attenuation mechanism and represent an alternative to dissipation-based devices. Attenuation due to dispersion may be significantly higher than what is afforded by dissipation-based systems within a design frequency rage. The proposed assemblies, however, are not easily tailored to filter lowe-frequency vibrations. To this end, embedding such periodic systems into an elastic matrix yields a high-pass mechanical filter with tunable stop bands were waves are not allowed to propagate. Significant improvements in performance moreover may be obtained if intrinsically nonlinear devices are adopted. Specifically, a strongly nonlinear medium such as ordered granular media supports a limited number of waveforms, resulting in an efficient mechanical filter. Results reported here, in fact, suggest matrix-embedded sphere chains as highly tunable mechanical filters for vibration attenuation.", "doi": "10.1115/DETC2009-87620", "isbn": "978-0-7918-4898-2", "publisher": "American Society of Mechanical Engineers", "place_of_publication": "New York, NY", "publication_date": "2009-09", "pages": "277-284" }, { "id": "authors:c6ppf-ny469", "collection": "authors", "collection_id": "c6ppf-ny469", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161004-083028476", "type": "book_section", "title": "An Experimental Investigation of Acoustic Band Gaps and Localization in Granular Elastic Chains", "book_title": "22nd Biennial Conference on Mechanical Vibration and Noise, Parts A and B", "author": [ { "family_name": "Boechler", "given_name": "Nicholas", "clpid": "Boechler-N" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "abstract": "We assembled a chain composed of a periodic arrangement of aluminum and steel spheres encased in a 4-rod polycarbonate holder with tunable static precompression applied by means of a lever actuated system. To excite periodic oscillations we perturbed the chain with a piezo-stack actuator driven by both continuous and finite bursts of a sinusoidally varying periodic signal. The amplitude of the periodic signal ranged from linear to strongly nonlinear regimes. We report the tunability of the frequency range for the band gap edges as a function of the material parameters, chain geometry and stress conditioning. We analyze the data by means of force-time plot and Fast Fourier Transforms (FFT). We observe a dramatic reduction of the transmitted wave amplitude for harmonic excitations with fundamental frequencies within the gap. The application of both continuous and short bursts of perturbation allows for observation of different dynamic phenomena at selected frequency ranges (in particular close to the lower optical branch edge). By varying the amplitude of the dynamic excitation (and therefore the level of the nonlinearity present in the system) we seek localized discrete breathing modes and surface instabilities. The comparison between continuum theory, discrete numerical modeling and experiments show a qualitative agreement and provide fundamental understanding for future investigation and numerous engineering applications. The challenges and considerations involved with the construction of an experimental system capable of capturing and leveraging on the described phenomena will be detailed.", "doi": "10.1115/DETC2009-87427", "isbn": "978-0-7918-4898-2", "publisher": "American Society of Mechanical Engineers", "place_of_publication": "New York, NY", "publication_date": "2009-09", "pages": "271-276" }, { "id": "authors:d7j0r-38v97", "collection": "authors", "collection_id": "d7j0r-38v97", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161004-131950659", "type": "book_section", "title": "Coupling of Highly Nonlinear Waves with Linear Elastic Media", "book_title": "Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems", "author": [ { "family_name": "Khatri", "given_name": "Devvrath", "clpid": "Khatri-D" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" }, { "family_name": "Rizzo", "given_name": "Piervincenzo", "clpid": "Rizzo-P" } ], "contributor": [ { "family_name": "Tomizuka", "given_name": "Masayoshi", "clpid": "Tomizuka-Masayoshi" }, { "family_name": "Yun", "given_name": "Chung-Bang", "clpid": "Yun-Chung-Bang" }, { "family_name": "Giurgiutiu", "given_name": "Victor", "clpid": "Giurgiutiu-V" } ], "abstract": "This paper reports a fundamental study of the coupling between highly nonlinear waves, generated in a one dimensional granular chain of particles, with linear elastic media, for the development of a new Non Destructive Evaluation and Structural Health Monitoring (NDE/SHM) paradigm. We design and use novel acoustic actuators to excite compact highly nonlinear solitary waves in a one-dimensional linear elastic rod and investigate the pulse propagation across the interface. To model the actuator and rod system we use Finite Element Analysis (Abaqus) and obtain excellent agreement between the experimental observations and the numerical results. We also study the response of the system to the presence of defects (cracks) in the steel rod, by comparing the wave propagation properties in pristine and cracked test objects. The obtained results encourage the use of highly nonlinear waves as an effective tool for developing a new, viable NDE/SHM method.", "doi": "10.1117/12.817574", "isbn": "9780819475527", "publisher": "Society of Photo-optical Instrumentation Engineers", "place_of_publication": "Bellingham, WA", "publication_date": "2009-03-30", "pages": "Art. No. 72920P" }, { "id": "authors:gzx96-hp011", "collection": "authors", "collection_id": "gzx96-hp011", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161004-134905089", "type": "book_section", "title": "Novel sensor technology for NDE of concrete", "book_title": "Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems", "author": [ { "family_name": "Ni", "given_name": "Xianglei", "clpid": "Ni-Xianglei" }, { "family_name": "Rizzo", "given_name": "Piervincenzo", "clpid": "Rizzo-P" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "contributor": [ { "family_name": "Tomizuka", "given_name": "Masayoshi", "clpid": "Tomizuka-Masayoshi" }, { "family_name": "Yun", "given_name": "Chung-Bang", "clpid": "Yun-Chung-Bang" }, { "family_name": "Giurgiutiu", "given_name": "Victor", "clpid": "Giurgiutiu-V" } ], "abstract": "This paper describes the application of a novel actuator/sensor technology for the generation and detection of stress waves in structural materials like concrete. The technology is aimed at developing an innovative NDE scheme based on the generation of highly nonlinear solitary waves (HNSWs). HNSWs are stress waves that can form and travel in highly nonlinear systems (i.e. granular, layered, fibrous or porous materials) with a finite spatial dimension independent on the wave amplitude. Compared to conventional linear waves, the generation of HNSWs does not rely on the use of electronic equipment (such as an arbitrary function generator) and on the response of piezoelectric crystals or other transduction mechanism. The results of using these new actuator/sensors to test concrete slabs are presented and discussed.", "doi": "10.1117/12.815510", "isbn": "9780819475527", "publisher": "Society of Photo-optical Instrumentation Engineers", "place_of_publication": "Bellingham, WA", "publication_date": "2009-03-30", "pages": "Art. No. 72918-1" }, { "id": "authors:0sbd0-t6k79", "collection": "authors", "collection_id": "0sbd0-t6k79", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180723-114843030", "type": "book_section", "title": "Highly nonlinear waves' sensor technology for highway infrastructures", "book_title": "Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2008", "author": [ { "family_name": "Khatri", "given_name": "Devvrath", "clpid": "Khatri-D" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" }, { "family_name": "Rizzo", "given_name": "Piervincenzo", "clpid": "Rizzo-P" } ], "contributor": [ { "family_name": "Shull", "given_name": "Peter J.", "clpid": "Shull-P-J" }, { "family_name": "Wu", "given_name": "H. Felix", "clpid": "Wu-H-Felix" }, { "family_name": "Diaz", "given_name": "Aaron A.", "clpid": "Diaz-A-A" }, { "family_name": "Vogel", "given_name": "Dietmar W.", "clpid": "Vogel-D-W" } ], "abstract": "This paper describes preliminary results towards the development of an innovative NDE/SHM scheme for material characterization and defect detection based on the generation of highly nonlinear solitary waves (HNSWs). HNSWs are stress waves that can form and travel in highly nonlinear systems (i.e. granular, layered, fibrous or porous materials) with a finite spatial dimension independent on the wave amplitude. Compared to conventional linear waves, the generation of HNSWs does not rely on the use of electronic equipment (such as an arbitrary function generator) and on the response of piezoelectric crystals or other transduction mechanism. HNSWs possess unique tunable properties that provide a complete control over tailoring: 1) the choice of the wave's width (spatial size) for defects investigation, 2) the composition of the excited train of waves (i.e. number and separation of the waves used for testing), and 3) their amplitude and velocity. HNSWs are excited onto concrete samples and steel rebar. The first pilot study of this ongoing effort between Caltech and the University of Pittsburgh is presented.", "doi": "10.1117/12.775848", "isbn": "9780819471208", "publisher": "Society of Photo-optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2008-04-08", "pages": "Art. No. 69340U" }, { "id": "authors:wev40-gae12", "collection": "authors", "collection_id": "wev40-gae12", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161004-130447803", "type": "book_section", "title": "Highly Nonlinear Waves' Sensor Technology for Highway Infrastructures", "book_title": "Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2008", "author": [ { "family_name": "Khatri", "given_name": "Devvrath", "clpid": "Khatri-D" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" }, { "family_name": "Rizzo", "given_name": "Piervincenzo", "clpid": "Rizzo-P" } ], "contributor": [ { "family_name": "Shull", "given_name": "P. J.", "clpid": "Shull-P-J" }, { "family_name": "Wu", "given_name": "H. F.", "clpid": "Wu-H-F" }, { "family_name": "Diaz", "given_name": "A. A.", "clpid": "Diaz-A-A" }, { "family_name": "Vogel", "given_name": "D. W.", "clpid": "Vogel-D-W" } ], "abstract": "This paper describes preliminary results towards the development of an innovative NDE/SHM scheme for material characterization and defect detection based on the generation of highly nonlinear solitary waves (HNSWs). HNSWs are stress waves that can form and travel in highly nonlinear systems (i.e. granular, layered, fibrous or porous materials) with a finite spatial dimension independent on the wave amplitude. Compared to conventional linear waves, the generation of HNSWs does not rely on the use of electronic equipment (such as an arbitrary function generator) and on the response of piezoelectric crystals or other transduction mechanism. HNSWs possess unique tunable properties that provide a complete control over tailoring: 1) the choice of the wave's width (spatial size) for defects investigation, 2) the composition of the excited train of waves (i.e. number and separation of the waves used for testing), and 3) their amplitude and velocity. HNSWs are excited onto concrete samples and steel rebar. The first pilot study of this ongoing effort between Caltech and the University of Pittsburgh is presented.", "doi": "10.1117/12.775848", "isbn": "978-0-8194-7120-8", "publisher": "Society of Photo-optical Instrumentation Engineers", "place_of_publication": "Bellingham, WA", "publication_date": "2008-04-08", "pages": "Art. No. 9340" }, { "id": "authors:6kbny-24c46", "collection": "authors", "collection_id": "6kbny-24c46", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161004-074435784", "type": "book_section", "title": "Entanglement and the Nonlinear Elastic Behavior of Forests of Coiled Carbon Nanotubes", "book_title": "Carbon nanotubes and related low-dimensional materials", "author": [ { "family_name": "Coluci", "given_name": "Vitor R.", "clpid": "Coluci-V-R" }, { "family_name": "Fonseca", "given_name": "Alexandre F.", "clpid": "Fonseca-A-F" }, { "family_name": "Galvao", "given_name": "Douglas S.", "clpid": "Galvao-D-S" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "contributor": [ { "family_name": "Chen", "given_name": "Li-Chyong", "clpid": "Chen-Li-Chyong" } ], "abstract": "A model for the elastic response of a foamlike forest of coiled carbon nanotubes under mechanical impact is proposed according to recent experiments reported in the literature. A force vs. displacement relation is derived for different geometries of the impacting object (sphere, cube and circular cone). In the model, entanglement among neighboring coils in the superior part of the forest is explicitly taken into account and we show that it allows the full description of the strongly nonlinear elastic behavior of the forest.", "doi": "10.1557/PROC-1081-P08-24", "isbn": "9781605110516", "publisher": "Materials Research Society", "place_of_publication": "Warrendale, PA", "publication_date": "2008-03", "pages": "1081-P08" }, { "id": "authors:rqte6-abr70", "collection": "authors", "collection_id": "rqte6-abr70", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:DARaipcp07", "type": "book_section", "title": "Propagation of highly nonlinear signals in a two dimensional network of granular chains", "book_title": "Shock Compression of Condensed Matter - 2007: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, Waikoloa, HI, 24\u201329 June 2007", "author": [ { "family_name": "Daraio", "given_name": "C.", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" }, { "family_name": "Nesterenko", "given_name": "V. F.", "clpid": "Nesterenko-V-F" } ], "contributor": [ { "family_name": "Elert", "given_name": "Mark" }, { "family_name": "Furnish", "given_name": "Michael D." }, { "family_name": "Chau", "given_name": "Ricky" }, { "family_name": "Holmes", "given_name": "Neil" }, { "family_name": "Nguyen", "given_name": "Jeffrey" } ], "abstract": "We report the first experimental observation of highly nonlinear signals propagating in a two dimensional system composed of granular chains. In this system one of the chains contacts two others to allow splitting and redirecting the solitary-like signal formed in the first chain. The system consists of a double Y-shaped guide in which high- and low-modulus chains of spheres are arranged in various geometries. We observed fast splitting of the initial pulse, rapid chaotization of the signal and sharp bending of the propagating acoustic information. Pulse and energy trapping was also observed in composite systems assembled from hard- and soft-particles in the branches.", "doi": "10.1063/1.2832991", "isbn": "978-0-7354-0469-4", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2007-12-12", "pages": "1419-1422" }, { "id": "authors:h689z-75108", "collection": "authors", "collection_id": "h689z-75108", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:DARaipcp06", "type": "book_section", "title": "Strongly Nonlinear Waves in Polymer Based Phononic Crystals", "book_title": "Shock compression of condensed matter--2005 : proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter held at Baltimore, MD 31 July-5 August, 2005", "author": [ { "family_name": "Daraio", "given_name": "C.", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" }, { "family_name": "Nesterenko", "given_name": "V. F.", "clpid": "Nesterenko-V-F" }, { "family_name": "Herbold", "given_name": "E. B.", "clpid": "Herbold-E-B" }, { "family_name": "Jin", "given_name": "S.", "clpid": "Jin-S" } ], "contributor": [ { "family_name": "Furnish", "given_name": "Michael D.", "clpid": "Fiurnish-M-D" }, { "family_name": "Elert", "given_name": "Mark L.", "clpid": "Elert-M-L" }, { "family_name": "Russell", "given_name": "Thomas P.", "clpid": "Russell-T-P" }, { "family_name": "White", "given_name": "Carter T.", "clpid": "White-C-T" } ], "abstract": "One dimensional \"sonic vacuum\"-type phononic crystals were assembled from chains of polytetrafluoroethylene (PTFE) beads and Parylene coated spheres with different diameters. It was demonstrated for the first time that these polymer-based granular system, with exceptionally low elastic modulus of particles, support the propagation of strongly nonlinear solitary waves with a very low speed. They can be described using classical nonlinear Hertz law despite the viscoelastic nature of the polymers and the high strain rate deformation of the contact area. Trains of strongly nonlinear solitary waves excited by an impact were investigated experimentally and were found to be in reasonable agreement with numerical calculations. Tunability of the signal shape and velocity was achieved through a non-contact magnetically induced precompression of the chains. This applied prestress allowed an increase of up to two times the solitary waves speed and significant delayed the signal splitting. Anomalous reflection at the interface of two \"sonic vacua\"-type systems was reported.", "doi": "10.1063/1.2263610", "isbn": "0-7354-0341-4", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2006-07-28", "pages": "1507-1510" }, { "id": "authors:bkc2n-tgf68", "collection": "authors", "collection_id": "bkc2n-tgf68", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:HERaipcp06", "type": "book_section", "title": "Influence of Controlled Viscous Dissipation on the Propagation of Strongly Nonlinear Waves in Stainless Steel Based Phononic Crystals", "book_title": "Shock compression of condensed matter--2005 : proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter held at Baltimore, MD 31 July-5 August, 2005", "author": [ { "family_name": "Herbold", "given_name": "Eric B.", "clpid": "Herbold-E-B" }, { "family_name": "Nesterenko", "given_name": "Vitali F.", "clpid": "Nesterenko-V-F" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" } ], "contributor": [ { "family_name": "Furnish", "given_name": "Michael D.", "clpid": "Furnish-M-D" }, { "family_name": "Elert", "given_name": "Mark L.", "clpid": "Elert-M-L" }, { "family_name": "Russell", "given_name": "Thomas P.", "clpid": "Russell-T-P" }, { "family_name": "White", "given_name": "Carter T.", "clpid": "White-C-T" } ], "abstract": "Strongly nonlinear phononic crystals were assembled from stainless steel spheres. Single solitary waves and splitting of an initial pulse into a train of solitary waves were investigated in different viscous media using motor oil and non-aqueous glycerol to introduce a controlled viscous dissipation. Experimental results indicate that the presence of a viscous fluid dramatically altered the splitting of the initial pulse into a train of solitary waves. Numerical simulations qualitatively describe the observed phenomena only when a dissipative term based on the relative velocity between particles is introduced.", "doi": "10.1063/1.2263614", "isbn": "0-7354-0341-4", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2006-07-28", "pages": "1523-1526" }, { "id": "authors:e1471-gcq92", "collection": "authors", "collection_id": "e1471-gcq92", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161003-152846556", "type": "book_section", "title": "Electrical Transport in Carbon Nanotube Y-junctions- a Paradigm for Novel Functionality at the Nanoscale", "book_title": "Organic and inorganic nanotubes: from molecular to submicron structures", "author": [ { "family_name": "Park", "given_name": "Jeongwon", "clpid": "Park-Jeongwon" }, { "family_name": "Daraio", "given_name": "Chiara", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" }, { "family_name": "Rao", "given_name": "Apparao", "clpid": "Rao-A-M" }, { "family_name": "Bandaru", "given_name": "Prabhakar", "clpid": "Bandaru-P" } ], "contributor": [ { "family_name": "Nielsch", "given_name": "K.", "clpid": "Nielsch-K" } ], "abstract": "Carbon Nanotube (CNT) morphologies with a self-contained gate, such as Y-junctions, offer a new way of exploiting features unique to the nanoscale, such as quantum ballistic transport. The advantages of low power and high frequency operation can then be applied to the fabrication of novel devices. Several other novel functionalities in Y- CNTs, including rectification, switching, high-frequency performance, and logic gates have been experimentally verified1. Y-CNT geometry dependent current blocking behavior, as a function of annealing temperature has also been observed. In view of the above observations, we propose that Y-CNTs can be used as prototypical nanoelectronic components.", "doi": "10.1557/PROC-0922-U11-08", "isbn": "9781558998797", "publisher": "Materials Research Society", "place_of_publication": "Warrendale, PA", "publication_date": "2006-01", "pages": "0922-U11" }, { "id": "authors:5cj65-fr528", "collection": "authors", "collection_id": "5cj65-fr528", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:DARaipcp04", "type": "book_section", "title": "Strongly Nonlinear Waves in 3D Phononic Crystals", "book_title": "Shock compression of condensed matter--2003 : proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter held at Portland, Oregon, 20-25 July 2003", "author": [ { "family_name": "Daraio", "given_name": "C.", "orcid": "0000-0001-5296-4440", "clpid": "Daraio-C" }, { "family_name": "Nesterenko", "given_name": "V.", "clpid": "Nesterenko-V-F" }, { "family_name": "Jin", "given_name": "S.", "clpid": "Jin-Sungho" } ], "contributor": [ { "family_name": "Furnish", "given_name": "Michael D.", "clpid": "Furnish-M-D" }, { "family_name": "Gupta", "given_name": "Yogendra M.", "clpid": "Gupta-Y-M" }, { "family_name": "Forbes", "given_name": "Jerry W.", "clpid": "Forbes-J-W" } ], "abstract": "Three dimensional phononic crystal (\"sonic vacuum\" without prestress) was assembled from 137 vertical cavities arranged in hexagonal pattern in Silicone matrix filled with stainless steel spheres. This system has unique strongly nonlinear properties with respect to wave propagation inherited from nonlinear Hertz type elastic contact interaction. Trains of strongly nonlinear solitary waves excited by short duration impact were investigated. Solitary wave with speed below sound speed in the air and reflection from the boundary of two \"sonic vacuums\" were detected.", "doi": "10.1063/1.1780215", "isbn": "0-7354-0181-0", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2004-07-20", "pages": "197-200" } ]