Search Results - "Austin, Ryan A."

A dislocation-based constitutive model for viscoplastic deformation of fcc metals at very high strain rates by Austin, Ryan A., McDowell, David L.

“…In this work a physically-based model is developed to address slip in polycrystalline metals and alloys subjected to very high rates of deformation (10 4–10 8…”
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Parameterization of a rate-dependent model of shock-induced plasticity for copper, nickel, and aluminum by Austin, Ryan A., McDowell, David L.

“…► Constitutive model addresses the dynamic strength of metals under shock wave loading. ► Model flow stress depends on pressure, temperature, strain rate, and…”
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Observation of Fundamental Mechanisms in Compression-Induced Phase Transformations Using Ultrafast X-ray Diffraction by Armstrong, Michael R., Radousky, Harry B., Austin, Ryan A., Stavrou, Elissaios, Zong, Hongxiang, Ackland, Graeme J., Brown, Shaughnessy, Crowhurst, Jonathan C., Gleason, Arianna E., Granados, Eduardo, Grivickas, Paulius, Holtgrewe, Nicholas, Lee, Hae Ja, Li, Tian T., Lobanov, Sergey, McKeown, Joseph T., Nagler, Bob, Nam, Inhyuk, Nelson, Art J., Prakapenka, Vitali, Prescher, Clemens, Roehling, John D., Teslich, Nick E., Walter, Peter, Goncharov, Alexander F., Belof, Jonathan L.

“…As theoretically hypothesized for several decades in group IV transition metals, we have discovered a dynamically stabilized body-centered cubic (bcc)…”
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Melting and refreezing of zirconium observed using ultrafast x-ray diffraction by Radousky, Harry B., Armstrong, Michael R., Austin, Ryan A., Stavrou, Elissaios, Brown, Shaughnessy, Chernov, Alexander A., Gleason, Arianna E., Granados, Eduardo, Grivickas, Paulius, Holtgrewe, Nicholas, Lee, Hae Ja, Lobanov, Sergey S., Nagler, Bob, Nam, Inhyuk, Prakapenka, Vitali, Prescher, Clemens, Walter, Peter, Goncharov, Alexander F., Belof, Jonathan L.

“…Ultrafast (130-fs) x-ray diffraction at the Linac Coherent Light Source has been applied to observe shock melting, which is driven by a rapid (120-ps) laser…”
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Shock compression modeling of metallic single crystals: comparison of finite difference, steady wave, and analytical solutions by Lloyd, Jeffrey T, Clayton, John D, Austin, Ryan A, McDowell, David L

“…Background The shock response of metallic single crystals can be captured using a micro-mechanical description of the thermoelastic–viscoplastic material…”
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Sensitivity of pore collapse heating to the melting temperature and shear viscosity of HMX by Kroonblawd, Matthew P., Austin, Ryan A.

“…A multiscale modeling strategy is used to quantify factors governing the temperature rise in hot spots formed by pore collapse from supported and unsupported…”
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Sensitivity of pore collapse heating to the melting temperature and shear viscosity of HMX by Kroonblawd, Matthew P., Austin, Ryan A.

“…A multiscale modeling strategy is used to quantify factors governing the temperature rise in hot spots formed by pore collapse from supported and unsupported…”
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A broad study of tantalum strength from ambient to extreme conditions by Prime, Michael B., Arsenlis, Athanasios, Austin, Ryan A., Barton, Nathan R., Battaile, Corbett C., Brown, Justin L., Burakovsky, Leonid, Buttler, William T., Chen, Shuh-Rong, Dattelbaum, Dana M., Fensin, Saryu J., Flicker, Dawn G., Gray, George T., Greeff, Carl, Jones, David R., Lane, J. Matthew D, Lim, Hojun, Luscher, D.J., Mattsson, Thomas R., McNaney, James M., Park, Hye-Sook, Powell, Philip D., Prisbrey, Shon T., Remington, Bruce A., Rudd, Robert E., Sjue, Sky K., Swift, Damian C.

“…[Display omitted] By combining experiments and modeling from three US national laboratories, we explore compressive strength in a well-characterized material,…”
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Modeling shock wave propagation in discrete Nickel/Aluminum powder mixtures by Austin, Ryan A

“…The focus of this work is on the modeling and simulation of shock wave propagation in reactive metal powder mixtures. Reactive metal systems are non-explosive,…”
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Modeling shock wave propagation in discrete Nickel/Aluminum powder mixtures by Austin, Ryan A

“…The focus of this work is on the modeling and simulation of shock wave propagation in reactive metal powder mixtures. Reactive metal systems are non-explosive,…”
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Observation of a metastable intermediate during solid-solid phase transformation in response to rapid compression by Armstrong, Michael R, Radousky, Harry B, Austin, Ryan A, Stavrou, Elissaios, Zong, Hongxiang, Ackland, Graeme J, Brown, Shaughnessy, Crowhurst, Jonathan C, Gleason, Arianna E, Granados, Eduardo, Grivickas, Paulius, Holtgrewe, Nicholas, Lee, Hae Ja, Li, Tian T, Lobanov, Sergey, McKeown, Joseph T, Nagler, Robert, Nam, Inhyuk, Nelson, Art J, Prakapenka, Vitali, Prescher, Clemens, Roehling, John D, Teslich, Nick E, Walter, Peter, Goncharov, Alexander F, Belof, Jonathan L

“…In order to probe the mechanism of solid-solid phase transformations, we have applied ultrafast shock wave compression (120 picosecond duration) and ultrashort…”
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