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Title: Experimental and numerical investigations of beryllium strength models using the Rayleigh-Taylor instability

We present a set of high explosive driven Rayleigh-Taylor strength experiments for beryllium to produce data to distinguish predictions by various strength models. Design simulations using existing strength model parameterizations from Steinberg-Lund and Preston-Tonks-Wallace (PTW) suggested an optimal design that would delineate between not just different strength models, but different parameters sets of the PTW model. Application of the models to the post-shot results, however, suggests growth consistent with little material strength. We focus mostly on efforts to simulate the data using published strength models as well as the more recent RING relaxation model developed at VNIIEF. The results of the strength experiments indicate weak influence of strength in mitigating the growth with the RING model coming closest to predicting the material behavior. Finally, we present shock and ramp-loading recovery experiments.
Authors:
;  [1] ; ; ; ; ; ; ;  [2] ; ; ;  [3]
  1. Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)
  2. Lawrence Livermore National Laboratory Livermore, California 94551-0808 (United States)
  3. Russian Federal Nuclear Center-VNIIEF, Sarov 607188 (Russian Federation)
Publication Date:
OSTI Identifier:
22412940
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 22; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BERYLLIUM; COMPUTERIZED SIMULATION; LOADING; MATHEMATICAL MODELS; MECHANICAL PROPERTIES; RAYLEIGH-TAYLOR INSTABILITY; RELAXATION