Use of the Richtmyer-Meshkov Instability to Infer Yield Stress at High-Energy Densities

Guy Dimonte; G. Terrones; F. J. Cherne; T. C. Germann; Virginie Dupont; K. Kadau; W. T. Buttler; D. M. Oro; C. Morris; D. L. Preston; Virginie Rollin

Use of the Richtmyer-Meshkov Instability to Infer Yield Stress at High-Energy Densities

Guy Dimonte, G. Terrones, F. J. Cherne, T. C. Germann, Virginie Dupont, K. Kadau, W. T. Buttler, D. M. Oro, C. Morris, D. L. Preston, Virginie Rollin

Embry-Riddle Aeronautical University

Research output: Contribution to journal › Article › peer-review

Abstract

We use the Richtmyer-Meshkov instability (RMI) at a metal-gas interface to infer the metal’s yield stress (Y) under shock loading and release. We first model how Y stabilizes the RMI using hydrodynamics simulations with a perfectly plastic constitutive relation for copper (Cu). The model is then tested with molecular dynamics (MD) of crystalline Cu by comparing the inferred Y from RMI simulations with direct stress-strain calculations, both with MD at the same conditions. Finally, new RMI experiments with solid Cu validate our simulation-based model and infer Y~0.47 GPa for a 36 GPa shock.

Original language	American English
Journal	Physical Review Letters
Volume	107
State	Published - Dec 23 2011

Keywords

molecular dynamics

Disciplines

Aerospace Engineering

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Use of the Richtmyer-Meshkov Instability to Infer Yield Stress atFinal published version, 1.01 MBLicense: CC BY

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title = "Use of the Richtmyer-Meshkov Instability to Infer Yield Stress at High-Energy Densities",

abstract = " We use the Richtmyer-Meshkov instability (RMI) at a metal-gas interface to infer the metal{\textquoteright}s yield stress (Y) under shock loading and release. We first model how Y stabilizes the RMI using hydrodynamics simulations with a perfectly plastic constitutive relation for copper (Cu). The model is then tested with molecular dynamics (MD) of crystalline Cu by comparing the inferred Y from RMI simulations with direct stress-strain calculations, both with MD at the same conditions. Finally, new RMI experiments with solid Cu validate our simulation-based model and infer Y~0.47 GPa for a 36 GPa shock.",

keywords = "molecular dynamics",

author = "Guy Dimonte and G. Terrones and Cherne, {F. J.} and Germann, {T. C.} and Virginie Dupont and K. Kadau and Buttler, {W. T.} and Oro, {D. M.} and C. Morris and Preston, {D. L.} and Virginie Rollin",

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language = "American English",

volume = "107",

journal = "Physical Review Letters",

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TY - JOUR

T1 - Use of the Richtmyer-Meshkov Instability to Infer Yield Stress at High-Energy Densities

AU - Dimonte, Guy

AU - Terrones, G.

AU - Cherne, F. J.

AU - Germann, T. C.

AU - Dupont, Virginie

AU - Kadau, K.

AU - Buttler, W. T.

AU - Oro, D. M.

AU - Morris, C.

AU - Preston, D. L.

AU - Rollin, Virginie

PY - 2011/12/23

Y1 - 2011/12/23

N2 - We use the Richtmyer-Meshkov instability (RMI) at a metal-gas interface to infer the metal’s yield stress (Y) under shock loading and release. We first model how Y stabilizes the RMI using hydrodynamics simulations with a perfectly plastic constitutive relation for copper (Cu). The model is then tested with molecular dynamics (MD) of crystalline Cu by comparing the inferred Y from RMI simulations with direct stress-strain calculations, both with MD at the same conditions. Finally, new RMI experiments with solid Cu validate our simulation-based model and infer Y~0.47 GPa for a 36 GPa shock.

AB - We use the Richtmyer-Meshkov instability (RMI) at a metal-gas interface to infer the metal’s yield stress (Y) under shock loading and release. We first model how Y stabilizes the RMI using hydrodynamics simulations with a perfectly plastic constitutive relation for copper (Cu). The model is then tested with molecular dynamics (MD) of crystalline Cu by comparing the inferred Y from RMI simulations with direct stress-strain calculations, both with MD at the same conditions. Finally, new RMI experiments with solid Cu validate our simulation-based model and infer Y~0.47 GPa for a 36 GPa shock.

KW - molecular dynamics

UR - https://commons.erau.edu/db-aerospace-engineering/4

M3 - Article

SN - 1079-7114

VL - 107

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Use of the Richtmyer-Meshkov Instability to Infer Yield Stress at High-Energy Densities

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Keywords

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