It is concluded that the total strain theory can be used as a substitute for the incrementalstrain theory to analyse the force and deformation in sheet metal deep-drawing process.
结果表明，全量理论可代替增量理论分析、计算拉延成形过程的力和变形等。
2
The results indicate that the relationship between stress ratio and strainincremental ratio in these materials is still a linear relation on the extended moblized plane.
结果表明，在扩展强度发挥面上，这几种材料的应力比与应变增量比之间仍具有线性关系。
3
When the stree strain relationship is the weak hardening, the relationship between stress ratio and strainincremental ratio shows the straight line with two different slopes.