NUMERICAL ANALYSIS OF CRACK PROPAGATION UNDER COMPRESSION
受压状态下裂纹扩展的数值分析

Based on the theory of linear elastic fracture m echanics(LEFM), the crack propagation of rock specim en is sim ulated through num ericalm anifold m ethod(NMM). Meanw hile, contact-friction ofthe inter- faces ofm aterials is m odeled by m eans ofim proved Lagarangian m ethod, and stress intensity factors are ob- tained by a path independent contour integralm ethod. Both the trajectories of crack propagation and the loads of different stages determ ined from this analysis are sim ilar to experim entalresults. Then num erical tests are carried out for differentinclination ofpreexisting crack.