[ { "id": "authors:910jq-nhd21", "collection": "authors", "collection_id": "910jq-nhd21", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201106-094245803", "type": "book_section", "title": "Pressure-shear plate impact experiments at very high pressures", "book_title": "Shock Compression of Condensed Matter - 2019", "author": [ { "family_name": "Kettenbeil", "given_name": "Christian", "clpid": "Kettenbeil-Christian" }, { "family_name": "Lovinger", "given_name": "Zev", "orcid": "0000-0002-9313-9495", "clpid": "Lovinger-Zev" }, { "family_name": "Ravindran", "given_name": "Suraj", "orcid": "0000-0003-2930-7906", "clpid": "Ravindran-Suraj" }, { "family_name": "Mello", "given_name": "M.", "orcid": "0000-0003-2129-9235", "clpid": "Mello-M" }, { "family_name": "Ravichandran", "given_name": "G.", "orcid": "0000-0002-2912-0001", "clpid": "Ravichandran-G" } ], "contributor": [ { "family_name": "Lane", "given_name": "J. Matthew D.", "clpid": "Lane-J-Matthew-D" }, { "family_name": "Germann", "given_name": "Timothy C.", "clpid": "Germann-Timothy-C" }, { "family_name": "Armstrong", "given_name": "Michael R.", "clpid": "Armstrong-Michael-R" }, { "family_name": "Wixom", "given_name": "Ryan", "clpid": "Wixom-Ryan" }, { "family_name": "Damm", "given_name": "David", "clpid": "Damm-Dsvid" }, { "family_name": "Zaug", "given_name": "Joseph", "clpid": "Zaug-Joseph" } ], "abstract": "Recent modifications of a powder gun facility at Caltech have enabled pressure shear plate impact (PSPI) experiments on materials at very high strain rates (>10\u2077 s\u207b\u00b9) and pressures (>20\u2005GPa), that have not been reached before. The high strain rate/pressure regime expands significantly the advantages of this well-studied technique. However, it requires overcoming several challenges including requiring a new approach for analysis of the experimental measurements, to extract the material's strength. At high pressures, standard anvils such as steel and tungsten carbide (WC) do not remain elastic, and their inelastic behavior needs to be accounted for in the analysis. The methodology presented here extracts the strength of the material using a hybrid method, combining numerical simulations to simultaneously match both the normal and transverse free surface velocity measurements. First, the inelastic response of the anvils is measured using symmetric PSPI experiments and a material model is calibrated to best match the experimental measurements. Then, measuring the response including the material of interest in a sandwich PSPI configuration, the anvil's material model is used for the analysis and the extraction of the strength of the material of interest. The methodology is demonstrated for soda-lime glass with WC anvils and pure magnesium with steel anvils. The proposed methodology has the potential to expand the PSPI experiments to higher pressures and strain rates.", "doi": "10.1063/12.0001099", "isbn": "978-0-7354-4000-5", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2020-11-04", "pages": "Art. No. 120010" }, { "id": "authors:qqajf-72b95", "collection": "authors", "collection_id": "qqajf-72b95", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20201106-093611155", "type": "book_section", "title": "Pressure-shear plate impact experiments of magnesium at high pressures", "book_title": "Shock Compression of Condensed Matter - 2019", "author": [ { "family_name": "Ravindran", "given_name": "Suraj", "orcid": "0000-0003-2930-7906", "clpid": "Ravindran-Suraj" }, { "family_name": "Lovinger", "given_name": "Zev", "orcid": "0000-0002-9313-9495", "clpid": "Lovinger-Zev" }, { "family_name": "Kettenbeil", "given_name": "Christian", "clpid": "Kettenbeil-Christian" }, { "family_name": "Mello", "given_name": "Michael", "orcid": "0000-0003-2129-9235", "clpid": "Mello-M" }, { "family_name": "Ravichandran", "given_name": "Guruswami", "orcid": "0000-0002-2912-0001", "clpid": "Ravichandran-G" } ], "contributor": [ { "family_name": "Lane", "given_name": "J. Matthew D.", "clpid": "Lane-J-Matthew-D" }, { "family_name": "Germann", "given_name": "Timothy C.", "clpid": "Germann-Timothy-C" }, { "family_name": "Armstrong", "given_name": "Michael R.", "clpid": "Armstrong-Michael-R" }, { "family_name": "Wixom", "given_name": "Ryan", "clpid": "Wixom-Ryan" }, { "family_name": "Damm", "given_name": "David", "clpid": "Damm-David" }, { "family_name": "Zaug", "given_name": "Joseph", "clpid": "Zaug-Joseph" } ], "abstract": "Magnesium and its alloys are widely used in the aerospace, automotive and defense industries, taking advantage of its high strength to weight ratio. However, these materials show strong anisotropy with its hexagonal close packed structure and texture. The experimental investigations probing the behavior of these materials at high pressures and strain rates are limited. In this study, experiments are conducted on extruded commercially pure magnesium using pressure shear plate impact (PSPI) experiments. The strength and the behavior of the materials are measured at pressures up to 10.5\u2005GPa and strain rates of 105 s\u22121. The PSPI experiments measure the materials under unique conditions, loading the material simultaneously in two directions. Experiments are conducted at two different pressures where the normal compressive stresses are aligned in one direction and the shear stresses, probing the material strength, are aligned perpendicular to the direction of the normal stress. The effect of pressure on the behavior of these materials under high pressures and strain rates are discussed. It was seen that magnesium exhibit higher strength at higher pressures due to the pressure hardening.", "doi": "10.1063/12.0001022", "isbn": "978-0-7354-4000-5", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2020-11-04", "pages": "Art. No. 120022" }, { "id": "authors:nrj4p-kx470", "collection": "authors", "collection_id": "nrj4p-kx470", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20180705-132900622", "type": "book_section", "title": "Pressure-shear plate impact experiment on soda-lime glass at a pressure of 30 GPa and strain rate of 4\u00b710^7 s^(-1)", "book_title": "Shock Compression of Condensed Matter - 2017", "author": [ { "family_name": "Kettenbeil", "given_name": "Christian", "clpid": "Kettenbeil-Christian" }, { "family_name": "Mello", "given_name": "Michael", "orcid": "0000-0003-2129-9235", "clpid": "Mello-M" }, { "family_name": "Jiao", "given_name": "Tong", "clpid": "Jiao-Tong" }, { "family_name": "Clifton", "given_name": "Rodney J.", "clpid": "Clifton-Rodney-J" }, { "family_name": "Ravichandran", "given_name": "Guruswami", "orcid": "0000-0002-2912-0001", "clpid": "Ravichandran-G" } ], "contributor": [ { "family_name": "Chau", "given_name": "Ricky", "clpid": "Chau-Ricky" }, { "family_name": "Germann", "given_name": "Timothy C.", "clpid": "Germann-Timothy-C" }, { "family_name": "Lane", "given_name": "Matthew D.", "clpid": "Lane-Matthew-D" }, { "family_name": "Brown", "given_name": "Eric N.", "clpid": "Brown-Eric-N" }, { "family_name": "Eggert", "given_name": "Jon H.", "clpid": "Eggert-Jon-H" }, { "family_name": "Knudson", "given_name": "Marcus D.", "clpid": "Knudson-Marcus-D" } ], "abstract": "Recent modifications of a powder gun facility at Caltech have enabled pressure-shear plate impact (PSPI) experiments in a regime of pressures and strain rates that were previously unaccessible. A novel heterodyne diffracted beam photonic Doppler velocimeter (DPDV) has also been developed for simultaneous measurement of the normal and transverse particle velocity histories using the \u00b11st order diffracted beams produced by a 400 lines/mm diffraction grating deposited onto the polished rear surface of the impacted target plate. We present and interpret the results of a PSPI experiment conducted on a 5 \u00b5m thick soda-lime glass sample subjected to a normal stress of 30 GPa and a shear strain rate of 4 \u00b7 10^7 s^(\u20131). Transverse particle velocity measurements reveal a peak shear stress level of 1.25 GPa up to a shear strain value of 2.2, followed by a precipitous drop in stress and complete loss of shear strength.", "doi": "10.1063/1.5044828", "isbn": "978-0-7354-1693-2", "publisher": "American Institute of Physics", "place_of_publication": "Melville, NY", "publication_date": "2017-07", "pages": "Art. No. 070019" } ]