裂纹于塑性变形积累到一定程度之后，在切变变形较大的区域表面形成。
Cracks form in the regions, where shear deformation is larger, after the plastic deformation accumulates to some degree.
试验结果表明，脆性材料的延性切削模式的实现是由于云母晶体对裂纹走向的引导和玻璃相的强烈的剪切变形能力的共同作用。
The test results show that the mechanism of ductile-mode material removal of the brittle material is attributed to a combination of.
由冲裁变形过程的分析可知，决定合理间隙值的理论依据是应保证在塑性剪切变形结束后，由凸模和凹模刃口处所产生的上、下剪切裂纹重合。
According to the blanking distortion procedure, the theory that decide the proper gap is to make sure the edge of the male die and female die's gap can be superposition.
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