材料的硬化曲线在 lnσ—lnε图里的图形是不尽相同的,有的是上跷曲线,有的是下绕曲线,有的则兼有上跷下绕形状,对描述硬化曲线的现有经验公式的分析表明,它们的适用范围还有限;为此,本文对兼有上跷下绕形状的材料提出了一个数模,以提高其硬化曲线的描述正确度。对一些低碳钢板的应用表明,结果良好。 Hardening curve of the material in the lnσ-lnε figure is not the same, some swoop curve, some under the winding curve, while others are on both sides of the shape under the sway, the analysis of existing experience formula describing the hardening curve It shows that their application scope is still limited. For this reason, a numerical model is proposed for the material which has the shape of the upper and lower windings so as to improve the description accuracy of the hardening curve. The application of some mild steel shows that the result is good.