A new approach is proposed to characterize the work-hardening behavior of metals based on the stress–strain data from uniaxial extension testing. With this new approach, the yield strength as a function of the plastic work can be determined by directly fitting a well-chosen single-variable shape function to any given uniaxial data from the initial yielding up to the strength limit, in an explicit sense with no need to carry out the usual tedious trial-and-error procedures in treating nonlinear elastoplastic rate equations toward identifying numerous unknown parameters. Numerical examples show that the simulation results with the new approach are in accurate agreement with the test data.

中文翻译：

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金属的工作硬化行为的全面表征：一种精确而明确的方法

提出了一种新方法来基于单轴延伸测试的应力-应变数据来表征金属的加工硬化行为。使用这种新方法，可以通过将精心选择的单变量形状函数直接拟合到从初始屈服到强度极限的任何给定单轴数据来确定塑性强度的函数，从明确意义上讲，在处理非线性弹塑性速率方程以识别大量未知参数时，无需执行通常繁琐的反复试验程序。数值算例表明，新方法的仿真结果与试验数据准确吻合。