THE INCLUSION OF MATERIAL STRENGTH IN HYDRODYNAMIC CALCULATIONS

Abstract

Development is reported of a theory for describing the response of solid bodies to high intensity impulsive loads, including the effect of material strength. Inclusion of material strength requires a full thermodynamic treatment, which has not been satisfactorily formulated. An approximation is considered in which entropy production due to plastic flow is neglected. In the resultant theory, stresses are related to elastic strains through an isentropic strain energy potential, and the elastic strains are limited by a yield condition. Results of an analysis of dynamic compressibility data for copper to 2.7 Mbar by second order elasticity theory are very encouraging. Analysis of experimental plane wave propagation data for aluminum with a variety of yield functions indicates that presently measurable quantities do not provide a sensitive means of determining the yield function. Other configurations may be more suitable, but require devel opment of two-dimensional solution methods.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1963
Accession Number
AD0410386

Entities

People

  • Arfon H. Jones
  • John H. Percy
  • Walter Herrmann

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Bulk Modulus
  • Computational Science
  • Constitutive Equations
  • Elastic Properties
  • Energy
  • Equations
  • Free Energy
  • Heat Energy
  • Isotherms
  • Materials
  • Mechanics
  • Military Research
  • Plastic Flow
  • Shear Modulus
  • Strain Hardening
  • Stress Strain Relations
  • Stresses

Readers

  • Structural Dynamics.
  • Systems Analysis and Design