基于材料的循环塑性预测了疲劳裂纹扩展的门槛值。
Fatigue crack growth threshold is predicted based on materials cyclic plasticity.
根据试验测定的焊缝各区冲击韧性、断裂韧性、疲劳裂纹扩展速率和疲劳裂纹扩展门槛值，对焊缝力学性能作出综合评价。
The mechanical properties of the butt welded joints have been evaluated according to the impulsive and fracture toughness as well as the rate and threshold values of fatigue crack propagation.
采用对比分析方法，从疲劳裂纹的门槛值角度出发，归纳总结了疲劳裂纹的扩展规律。
In contrast with the threshold of fatigue cracks, a series of regulation of expanding of fatigue small cracks has been deduced.
基于三维裂纹特征，本文提出了一种测量孔边角裂纹近门槛区疲劳裂纹扩展速率及门槛值的实验方法。
Based on the features of the three-dimensional crack, an experimental method was presented to measure the near-threshold fatigue crack growth rate and threshold of the corner crack at a hole.
基于三维裂纹特征，本文提出了一种测量孔边角裂纹近门槛区疲劳裂纹扩展速率及门槛值的实验方法。
Based on the features of the three-dimensional crack, an experimental method was presented to measure the near-threshold fatigue crack growth rate and threshold of the corner crack at a hole.
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