rate of crack propagation

The propagation rate of crack also decreases with increasing the binder content of cermets.

随着金属陶瓷中金属相含量的增加,裂纹扩展速率降低.

The crack propagation rate of pipes was mainly dependent on FATT "of pipeline steel, and FATI" can be measured by drop weight tear test.

介绍了管道裂纹的扩展速度主要取决于管道钢的转变温度FATT，FATT可由落锤撕裂试验测定。

The results shown that the different zones of butt joints have different fatigue crack propagation rate. The average load, welding residual stress and the microstructures influenced the propagating rate of fatigue crack.

结果表明，焊接接头的不同部位疲劳裂纹扩展速率不同，平均应力、焊接残余应力、金相组织对疲劳裂纹的扩展速率都有一定的影响。

Two parameters of the crack dynamic propagation driving force, energy release rate and crack tip opening angle, are calculated by establishing a finite element model of the crack dynamic propagation in gas pipelines and considering the attenuation of the crack propagation velocity.

通过建立输气管道裂纹动态扩展的有限元模型，并在模拟计算中考虑裂纹扩展速度的衰减，分别计算了表征动态裂纹扩展驱动力的两项参数&能量释放率和裂纹尖端张开角；

Grain size had some effect on the rate of crack propagation.

晶粒尺寸大小对裂纹扩展速率也有影响.

The results show that the life of fatigue is increased remarkably, the period of crack initiation is delayed and the propagation rate of crack is decreased after RE N C B diffusion of the steel.

结果表明，稀土氮碳硼共渗处理后，45钢疲劳寿命显著提高，裂纹形成延迟，裂纹扩展速度降低。