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采用Gleeble3500热模拟试验,研究了热压缩变形过程中塑性功转化热造成的温度升高对构建材料本构方程精确度的影响,并构建了带有温度补偿的材料本构方程。结果表明:高速压缩过程中(ε觶≥1s-1),由塑性功转化热造成的温升与真应变呈线性关系;构建带有温升补偿的本构方程可提高本构方程的精度。
Using Gleeble3500 thermal simulation test, the influence of temperature rise caused by plastic work heat transformation on the accuracy of the constitutive equation was studied and the constitutive equation of the material with temperature compensation was established. The results show that there is a linear relationship between temperature rise and true strain caused by the transformation heat of plastic work during high-speed compression (ε 觯 ≥1s-1). Constructing a constitutive equation with temperature compensation can improve the accuracy of the constitutive equation.