疲劳裂纹从尖缺口处萌生的门槛值接近块体材料。
The threshold of the fatigue crack initiation from the notch of the microbeam is close to that of the bulk material.
利用一种新的橡胶材料应变能函数，对橡胶楔体与刚性缺口接触大变形问题进行了分析。得到了楔体尖端场的渐近方程，对渐近方程进行了数值分析，得到了尖角附近应力及变形分布。
A new strain energy function was used to analyze a rubber wedge contact with a rigid notch. We found the asymptotic equations near wedge tip, and solved the equations with numeric method.
当裂尖出现纤维裂纹后，韧脆转变机理是：由二相粒子决定的解理断裂应力转变成由晶粒尺寸决定的解理断裂应力。同缺口试样具有相同的临界事件。
The mechanism of ductile-brittle transition was considered as the result of the transition of stress as determined by the second phase particle to that as determined by the ferrite grain.
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