疲劳裂痕成长；
Load hold also accelerates crack growth.
载荷保持加速裂纹扩展。
The crack growth rate is linear with J-integral.
扩展速率与J积分有线性关系。
The factors influencing the fatigue crack growth are of random nature.
影响疲劳裂纹成长的因素具有随机性质。
Besides, the welding stress and wicked water accelerate the crack growth.
同时，焊接应力的存在和水质不良加速了裂纹的扩展。
We present the improvement of two existing algorithms of multiple crack growth.
对现行的两种多裂纹扩展算法作了改进。
The initiation life, growth life and crack length distributions are affected by the grain size.
晶粒尺寸对形成寿命、扩展寿命和裂纹长度的分布特性都有影响。
The initiation life, growth life and crack length distributions are affected by the grain size.
晶粒尺寸对形成寿命、扩展寿命和裂纹长度的分布特性都有影响。
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