裂纹前缘 meaning in Chinese

crack front

Plastic zone affected by crack tip curvature
裂尖曲率对裂纹前缘塑性区的影响
A global crack - line displacement fitting procedure ( gcdfp ) for computing stress intensity factors ( sif ) has been developed . the precision of sif is compatible with the corresponding cod data
使用paris公式求出裂纹前缘各点的裂纹扩展增量，并用三次b -样条函数对这些增量进行拟合，得到新的光滑裂纹前缘。
According to our experimental investigations of varying load amplitude , it was found that the phenomena of fatigue crack growth retardation occurred for pmma material following a high overload cycle exerted among the regular constant amplitude load cycles , the ratio of peak value of overload to that of the regular cycles should be over at least 1 . 35 to make the retardation taking effect . the experiment scheme for measuring the shutting - off ratio of overload ( defined as the overload ratio when da / dn < 10 - 7 / cyc . )
本文试验分析了变幅载荷对裂纹扩展的影响，证实了有机玻璃也存在超载迟滞现象，通过金相观察分析，提出超载迟滞的过程实际上是裂纹前缘萌生新的裂纹的过程的观点，同时提出超载迟滞的合理的解析，并且给出超载迟滞比，为随机载荷下疲劳扩展模型的建立提供了一个重要的参数。