Accession Number:

AD0751546

Title:

Interactions of Stress Waves with Cracks in Rock Media

Descriptive Note:

Semi-annual rept. 1 Mar-1 Sep 1972

Corporate Author:

WHITTAKER CORP NORTH HOLLYWOOD CA SHOCK HYDRODYNAMICS DIV

Personal Author(s):

Report Date:

1972-09-01

Pagination or Media Count:

32.0

Abstract:

A number of model problems involving the elastic deformation of a body perforated by a pore or crack have been solved. For each of these problems effective elastic moduli are defined as a function of the flaw content. These effective elastic parameters are introduced into the Griffith criterion and flaw growth is followed. A cubic viscosity has been introduced into the SHEP Program. The purpose of this fictive term is to provide better control over the oscillation introduced in an algorithm based on a difference scheme and also based on out-of-plane motion. By contrast, quadratic viscosity which is ordinarily used does not control out-of-plane motion.

Subject Categories:

  • Geology, Geochemistry and Mineralogy
  • Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE