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Strength and viscosity effects on perturbed shock front stability in metals

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [2];  [2]
  1. Arizona State Univ., Tempe, AZ (United States); Arizona State University
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Arizona State Univ., Tempe, AZ (United States)
Here, computational modeling and experimental measurements on metal samples subject to a laser-driven, ablative Richtmyer-Meshkov instability showed differences between viscosity and strength effects. In particular, numerical and analytical solutions, coupled with measurements of fed-through perturbations, generated by perturbed shock fronts onto initially flat surfaces, show promise as a validation method for models of deviatoric response in the post shocked material. Analysis shows that measurements of shock perturbation amplitudes at low sample thickness-to-wavelength ratios are not enough to differentiate between strength and viscosity effects, but that surface displacement data of the fed-through fed-thru perturbations appears to resolve the ambiguity. Additionally, analytical and numerical results show shock front perturbation evolution dependence on initial perturbation amplitude and wavelength is significantly different in viscous and materials with strength, suggesting simple experimental geometry changes should provide data supporting one model or the other.
Research Organization:
Arizona State Univ., Tempe, AZ (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); USDOE Office of Science (SC). Fusion Energy Sciences (FES) (SC-24)
Contributing Organization:
Los Alamos National Laboratory
Grant/Contract Number:
AC52-06NA25396; NA0002005; SC0008683
OSTI ID:
1356634
Alternate ID(s):
OSTI ID: 1356277
OSTI ID: 1369184
OSTI ID: 1460717
Report Number(s):
DOE-ASU--02005-4; LA-UR--16-27117
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 118; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Letter: Magneto-Rayleigh-Taylor instability in an elastic-medium slab journal November 2018
Tantalum strength at extreme strain rates from impact-driven Richtmyer-Meshkov instabilities journal November 2019
Stability boundaries for the Rayleigh-Taylor instability in accelerated elastic-plastic solid slabs journal December 2019
Rayleigh-Taylor instability in accelerated elastic-solid slabs journal December 2017