Interactions of Stress Waves with Cracks in Rock Media

Abstract

Two-dimensional numerical solutions of three problems of stress wave interactions with oblique cracks in granite have been carried out using the SHEP code, a finite-difference Lagrangian program that incorporates a comprehensive hydrodynamic-elastic-plastic behavioral model. The problems involve both infinite and finite-length crack surfaces. To enable the study of propagation of cracks under stress wave loading, a dynamic Griffith criterion has been formulated for incorporation into the code. Comparisons of the numerical results with analytic solutions for model problems are being obtained to verify the code. Included in these correlations is the problem of an accelerating crack for the case of anti-plane shear.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1971
Accession Number
AD0731740

Entities

People

  • Mark H. Wagner
  • Paul J. Blatz

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Computational Science
  • Computer Programs
  • Contracts
  • Crack Propagation
  • Crack Tips
  • Cracks
  • Geometry
  • Materials
  • Mechanical Properties
  • Mechanics
  • Numerical Analysis
  • Shear Stresses
  • Stress Waves
  • Stresses
  • Two Dimensional
  • Wave Propagation
  • Waves

Fields of Study

  • Engineering

Readers

  • Explosive Engineering.
  • Materials Science (Mechanical Engineering).
  • Wave Propagation and Nonlinear Chaotic Dynamics.