真实应变e的增量应该是瞬时伸长量除以瞬时长度de=dL/L。
通过实验得到真实应力的关系式及真实应变关系式，进而得到真实应力-应变曲线。
Through the experiment, the relation formula of real stress, real strain and the curve of stress and strain are achieved.
本文章系列是以真实的随需应变转化项目，Oneida - 2为基础的。
This article series is based on a real on demand transformation project, Oneida-2.
计算时，板料的真实应力-应变曲线拟合为幂强化函数型。
In calculating, power hardening function is used as the true stress - strain curve of materials.
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