旋转弯曲疲劳强度是抗裂纹扩展能力的判据。
The rotating bending fatigue strength is the criterion of resistance to propagation of hot cracks.
在第二个临界载荷下，三个判据都满足的区域相互重叠，解理裂纹形核并扩展。
Under the second critical load, the regions, where the three criteria are satisfied, are overlapped each other and cleavage crack is nucleated and propagates.
利用当量直线裂纹扩展法研究复合型裂纹的能量释放率及相应的断裂判据。
The energy release rate and failure criterion for mixed mode are investigated by means of the method of equivalent linear crack extension.
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