STRESS RELAXATION IN THE SHOCK COMPRESSION OF SOLIDS

Abstract

Nonsteady-state behavior in the early stages of one-dimensional shock propagation was investigated. This behavior has been termed stress relaxation. The work consisted of an experimental phase and a theoretical-computational phase. In the experimental phase, stress-time profiles resulting from impact by a gas-gun projectile were observed in hard and soft 2024 aluminum and in polyethylene at various distances from the plane of impact. In the theoretical and computational phase, several mathematical models of stress relaxation were developed. Computations based on these models have been performed by the method of characteristics and by the artificial viscosity method of von Neumann and Richtmyer. It has been found that the two-parameter model of stress relaxation predicts the experimental results more closely than does the one-parameter model.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1967
Accession Number
AD0814787

Entities

People

  • Gordon D. Anderson
  • Roy C. Alverson
  • Sathyanarayana V. Hanagud
  • William J. Murri

Organizations

  • SRI International

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Contracts
  • Difference Equations
  • Differential Equations
  • Elastic Waves
  • Equations
  • Equations Of State
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Plastic Flow
  • Shear Stresses
  • Shock Waves
  • Stresses
  • Wave Propagation
  • Yield Strength

Fields of Study

  • Physics

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Computational Fluid Dynamics (CFD)
  • Fluid Dynamics.