Accession Number:

AD0731740

Title:

Interactions of Stress Waves with Cracks in Rock Media

Descriptive Note:

Semi-annual rept. 25 Jan-25 Jul 1971

Corporate Author:

WHITTAKER CORP NORTH HOLLYWOOD CA SHOCK HYDRODYNAMICS DIV

Personal Author(s):

Report Date:

1971-09-01

Pagination or Media Count:

76.0

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.

Subject Categories:

  • Geology, Geochemistry and Mineralogy
  • Civil Engineering
  • Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE