Interactions of Stress Waves with Cracks in Rock Media
Semi-annual rept. 1 Mar-1 Sep 1972
WHITTAKER CORP NORTH HOLLYWOOD CA SHOCK HYDRODYNAMICS DIV
Pagination or Media Count:
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.
- Geology, Geochemistry and Mineralogy