【摘要】 应力应变关系为幂次曲线的材料，强化指数ｎ既然可以用来确定材料变形的全过程，当然也应该与ｍｋ值有一定的密切关系。本文为各种应力应变关系导出了用ｎ值求ｍｋ值的关系式。对几种常用板金的ｍｋ计算值与实验值符合良好，可供实用。更多还原

【Abstract】 For materials when their stress-strain relation can be expressed with an exponential equation,the strain hardening Index n governs the whole stress-strain curve in plastic range including deep drawing,thus it may be ascertained that the index n can be equally valid to be usedto determine the critical draw ratio mk.This idea is fulfilled with an analytical expression which conforms nicely with the experimental results.更多还原