LIMITING VELOCITY OF CRACK PROPAGATION IN DYNAMICALLY FRACTURED MATERIALS

摘要

A model of a fractal crack is considered. It is found that the limiting velocity of crack propagation is determined by the fractal dimension of the crack contour. It is shown that for commercial steels, the limiting crack velocity is in the range V_(lim) = (0.155-0.537)c_1 (c_1 is the speed of sound).