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lidongze(金币+13, 翻译EPI+1): 2011-01-20 18:01:21
The fatigue crack propagation threshold seems to be defined by the condition that the cyclic plastic zone at the crack tip is of the order of grain size , and the influence of the mean stress seems to be defined by the maximum stress intensity factor (Kmax) through its influence on crack closure behaviour, the crack-tip blunting phenomenon, the crack-tip environment and the monotonic plastic zone. 疲劳裂纹扩展阈值可能受在具有纹理尺寸顺序的裂纹尖端的循环塑性区的条件限制，平均应力的影响可能被最大应力强度因子（Kmax）通过它对裂纹闭合行为，裂纹尖端钝化现象，裂纹尖端的环境和单调的塑性区的影响而受到限制。
最后半句还可翻译为：
最大应力强度因子（Kmax）通过它对裂纹闭合行为，裂纹尖端钝化现象，裂纹尖端的环境和单调的塑性区的影响来限制平均应力的影响 |
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