Treatment of anisotropic damage development within a scalar damage formulation

摘要

This paper is concerned with describing a damage mechanics formulation which provides for non- isotropic effects using a scalar damage variable. An inv- estigation has been in progress for establishing the con- stitutive behavior of rock salt at long times and low to moderate confining pressures in relation to the possible use of excavated rooms in rock salt formations as repos- itories for nuclear waste. An important consideration is the effect of damage manifested principally by the for- mation of shear induced wing cracks which have a stress dependent orientation.