The fatigue crack closure and fatigue crack growth rate in the high strain region of SCT specimen are studied.

本文研究了SCT试样高应变区的疲劳裂纹闭合效应和疲劳裂纹扩展速率。

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The high fatigue properties were found to be related with higher crack closure stress, rough fracture surface and tortuousity of crack path.

较高的疲劳性能与裂纹尖端闭合应力、断口表面粗糙度以及裂纹扩展路径弯折程度有关。

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The simulating results have indicated that: the crack closure effect is obviously influenced by the fatigue crack length.

在建立裂纹扩展模型的时候，要考虑到裂纹长度对裂纹闭合效应的影响。

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