三、塑性加工应变分析塑性加工时通常不但要产生线变形,还要产生角变形。研究物体的变形状态应从分析微小变形开始。因为,既使对于大塑性变形过程,在其每一瞬间也是小应变,只是积累起来才构 Third, the plastic processing strain analysis Plastic processing is usually not only to produce line deformation, but also produce angular deformation. The deformation state of the object should be studied from the analysis of small deformation. Because, even for the large plastic deformation process, in each moment it is also a small strain, but only accumulated