By observing the initial Angle of crack arid its propagating path, a simple model to predict the retardation effect of Z-shaped fatigue crack was proposed.
通过观察裂纹的开裂角及扩展路径，提出了一个能用来估算Z型裂纹过载迟滞效应的简单模型。
The initial path of crack pro-pogation is related with a rake angle of the cutting blade.
裂纹扩展的初期路径与刀具的前角有关。
The initial path of crack pro-pogation is related with a rake angle of the cutting blade.
裂纹扩展的初期路径与刀具的前角有关。
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