STRESS WAVE PROPAGATION AND SPALLATION IN UNIAXIAL STRAIN

Abstract

A discussion of the analytical methods of predicting uniaxial stress wave propagation and spall as a result of uniformly distributed intense impulsive loading is given. For the materials for which data currently exists, no strain-rate effects are observed on yield (i.e. two aluminum alloys) and the strain-rate effect on the fracture threshold is found to be small (copper). For such materials a detailed analytical treatment is possible, once the constants associated with the constitutive equation and fracture criterion are evaluated. The plate impact experiment provides a convenient means of evaluating these constants. Considerations entering into the interpretation of the plate impact experiment and a detailed analysis of the effect of air between the impacting plates are given.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1962
Accession Number
AD0288885

Entities

People

  • Arfon H. Jones
  • Emmett A. Witmer
  • John H. Percy
  • Walter Herrmann

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Computational Fluid Dynamics
  • Computational Science
  • Constitutive Equations
  • Crystal Lattices
  • Crystal Structure
  • Difference Equations
  • Differential Equations
  • Engineering
  • Materials
  • Mechanics
  • Modulus Of Elasticity
  • Shock Waves
  • Specific Heat
  • Specific Volume
  • Stress Strain Relations
  • Two Dimensional
  • Yield Strength

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Mechanical Engineering/Mechanics of Materials.
  • Theoretical Analysis.