1、1234567891011121314在切应力作用下，一个裂纹面在另一裂纹在切应力作用下，一个裂纹面在另一裂纹面上滑动脱开。裂纹前缘平行于滑动方向面上滑动脱开。裂纹前缘平行于滑动方向u大多数裂纹形式属于大多数裂纹形式属于型裂纹，最危险型裂纹，最危险153cos1sincos22223cos1sincos22223sincoscos2222IxIyIxyKrKrKr1622222cos1sincos22222sin1sincos2222IIKruEKrvE222 1cos22cos2222sin22cos222IIKruEKrvE17：IKa 181912IyyKr12 2IyyKr20()Iy
2、Kar 2112IsaK 2114 2IsaK 21EUW 22aUE4Wa224aEaE 22222244EaaaaaEE 22040EaaE 2UaGaE 2eWGa2322aE 22aE 2cEa22cEa24（P+）2cEPa22cEPa2240aPE P25，IICKKIICGG2IKGE21IKGE26C272820.520.250.5sssssa 4IsKE214IsKE292IIKJGE221IIKJGEuJwdydsxTICJJ30ICCKa212nsnsWaWWaIICKaK 212gnssgnWaWWa31IIdKK3200.38(1)caVCa33 0K Vk V K 2KGA VE 0G Vg V G343536121122BWWBssgnsgWWnnWWWaWaM1WCWBnKa121122BBWBnnbgsnbgWBssWWWaWaM37383940 4142434445 4647484950515253545556575859606162636465个人观点供参考，欢迎讨论
