zigzag crack

Considering the complexity and inhomogeneity of rock-like materials,especially the presence of some interfaces of weak strength between mineral grains,an analysis on two type of zigzag cracks,namely,the inner-open silding crack(IOSC) and the single-wing sliding crack (SWSC),are presented.

针对类岩石材料的复杂性和非均质性 ,特别是材料中一些强度相对较弱的晶界的存在等 ,对形状较为复杂的两种锯齿形裂纹 :内张型滑动裂纹和单翼滑动裂纹的应力强度因子进行了分析 。

Measurement and calculation of M value of particular gear style thread;

特殊锯齿形螺纹M值的测量与计算方法