The Inclusion of Strain-Rate Dependence in the PUFF Computer Code

Abstract

Two mathematical descriptions of the strain-rate dependence of materials response to suddenly applied one-dimensional strain loads were incorporated into the PUFF wave propagation computer codes. The models are quite different in that one uses a macroscopic relaxation time to govern the stress- relaxation rates, while the other uses the microscopic theories of dislocation dynamics. The results of several sample calculations are discussed, and the changes required in the programming sequence are given. Some comments are provided concerning the validity and usefulness of these models, and a brief analysis of the effects of parametric variations is presented.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1969
Accession Number
AD0850882

Entities

People

  • Joseph B. Wester Iii

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Computer Programming
  • Computers
  • Equations
  • Government Procurement
  • Governments
  • Hydrostats
  • Inclusions
  • Mechanics
  • Relaxation Time
  • Shear Stresses
  • Strain Rate
  • Stress Waves
  • Stresses
  • Time Dependence
  • Waves
  • Yield Strength

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Materials Science and Engineering.
  • Plasma Physics / Magnetohydrodynamics