试验研究了裂纹扩展过程中超载载荷迟滞效应。
The hysteresis that was induced by overload was investigated experimentally.
提出了拉伸超载对疲劳裂纹扩展过程影响的一般机制。
A general mechanism of the effect of tensile overload on FCP behaviour is proposed.
这些结论都建立在理想的假设上，即实用应用力在裂纹扩展过程中不变。
Both of these statements are based on the tacit assumption that the applied stress does not change during the crack growth process.
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