单击此处编辑母版标题样式单击此处编辑母版文本样式第二级第三级第四级第五级3.1.1 Basic assumption in plastic forming1 补充术语(Supplementary Term)The mechanics of deformation 变形机制 Metal forming 金属成形 Strain rates 应变速率 Elastic deformation弹性变形 P