Material dynamics under extreme conditions of pressure and strain rate

Remington, B. A.; Allen, P. G.; Bringa, Eduardo M.; Hawreliak, J.; Ho, D.; Lorenz, K. Thomas; Lorenzana, H. E.; McNaney, J. M.; Meyers, Marc A.; Pollaine, S. M.; Rosolanková, K.; Sadik, B; Schneider, M.; Swift, Damian; Wark, J. S.; Yaakobi, B.

doi:10.1179/174328406x91069

Cited by 122 publications

(54 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To be able to interpret our experimental results required the development of a new solid-state strength model, namely, the multiscale model, to treat this new regime of plastic flow [18]. This work is summarized, for a small subset of our results, in Fig. 2 [19][20][21][22][23][24][25]. The basic mechanism of solid-state plastic flow is very different from fluid flow in the plasma state, as illustrated schematically in Fig.…”

Section: Rayleigh-taylor Instability In Solid-state Plastic Flowmentioning

confidence: 99%

Experiments in ICF, materials science, and astrophysics

Remington¹

2016

Edward Teller Lectures

View full text Add to dashboard Cite

Abstract. We have been developing HED experiments on high power ICF lasers over the past two decades that span (1) the radiative hydrodynamics of ICF capsule physics; (2) the high pressure, high strain rate, solid-state dynamics relevant to novel concepts for ICF and hypervelocity impacts in space and on Earth; and (3) the shock driven turbulence of exploding stars (supernovae). These different regimes are separated by many orders of magnitude in length, time, and temperature, yet there are common threads that run through all of these phenomena, such as the occurrence of hydrodynamic instabilities. Examples from each of these three seemingly very disparate regimes are given, and the common theme of hydrodynamic instability evolution is explored.

show abstract

Section: Rayleigh-taylor Instability In Solid-state Plastic Flowmentioning

confidence: 99%

Experiments in ICF, materials science, and astrophysics

Remington¹

2016

Edward Teller Lectures

View full text Add to dashboard Cite

show abstract

“…In the literature on plastic flow of metals under extreme conditions of pressure and strain rate (cf., e.g., Remington et al [15] for a recent review), the plastic flow strength in shear (under isothermal conditions), S, is often taken to be given by…”

Section: Partial Validation Of the Coupled Free Energy Functionmentioning

confidence: 99%

A Large Strain Isotropic Elasticity Model Based on Molecular Dynamics Simulations of a Metallic Glass

Henann¹,

Anand²

2011

Methods and Tastes in Modern Continuum Mechanics

View full text Add to dashboard Cite

For an isotropic hyperelastic material, the free energy per unit reference volume, ψ, may be expressed in terms of an isotropic function ψ =ψ(E) of the logarithmic elastic strain E = ln V. We have conducted numerical experiments using molecular dynamics simulations of a metallic glass to develop the following simple specialized form of the free energy for circumstances in which one might encounter a large volumetric strain tr E, but the shear strain √ 2|E 0 | (with E 0 the deviatoric part of E) is small but not infinitesimal:, withThis free energy has five material constants -the two classical positive-valued shear and bulk moduli µ 0 and κ 0 of the infinitesimal theory of elasticity, and three additional positive-valued material constants (µr, ǫr, ǫc), which are used to characterize the nonlinear response at large values of tr E. In the large volumetric strain range −0.30 ≤ tr E ≤ 0.15 but small shear strain range √ 2|E 0 | 0.05 numerically explored in this paper, this simple five-constant model provides a very good description of the stress-strain results from our molecular dynamics simulations.

show abstract

“…The last decade has seen a surge of works related to the strength properties of matter [2]. In this paper we discuss SS304 and focus on SS304L.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the shear strength constitutive relation for SS304L was calibrated at low pressures and moderate strain rates. In this region, thermally activated motion of dislocations is expected to be the dominant stress mechanism [2]. Plane impact on SS304 [5] and laser on SS304L [6] experiments have been carried out in the range of 10 GPa, in order to directly measure their strength properties.…”

Section: Introductionmentioning

confidence: 99%