The result shows: the local residual tensile stress and cyclic compressive loading thrust fatigue crack initiation and propagation in the size of compressive plastic zone.
结果表明，疲劳裂纹是在残余拉应力和循环压应力作用下萌生和扩展的，压塑性变形是裂纹萌生和扩展的必要条件。
The result shows that the method of local heating-cooling can decrease the residual tensile stress peak in dangerous area of the blade.
结果表明，采用局部加热冷却的方法可以有效地减小叶片危险区域的残余拉应力峰值。
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