C194铜合金轧制冷塑性变形有限元模型的建立

以C194铜合金为研究对象,利用Gleeble-1500D热模拟试验机进行了室温单向拉伸实验,获得了应变速率分别为0.01,0.1,1和10 s^-1的应力-应变曲线,构建了C194铜合金室温本构方程,验证了本构方程的准确性。基于Deform-3D有限元数值模拟平台,建立了C194铜合金轧制冷塑性变形有限元模型,并在相同工艺条件下进行了轧制变形实验,结果表明:除第5道次模拟结果与实验的厚度相对误差值为11%之外,其余误差值均小于10%,验证了轧制冷塑性变形有限元模型的可靠性和精确性。为研究C194铜合金板带变形规律及工艺优化奠定了基础。

Establishment of finite element model for cold plastic deformation of C194 copper alloy in rolling

For C194 copper alloy,the unidirectional tension test at room temperature was conducted by thermal simulator Gleeble-1500D,and the stress-strain curves were obtained under the strain rates of 0.01,0.1,1 and 10 s^-1 respectively.Then,the constitutive equation of C194 copper alloy at room temperature was constructed,and the accuracy of the constitutive equation was verified.Furthermore,based on the finite element numerical simulation platform Deform-3D,the finite element model of cold plastic deformation for C194 copper alloy in the rolling was established,and the rolling deformation experiments were carried out under the same technological conditions.The results show that the relative error value of thickness for the fifth pass between the simulation and the experiment is 11%,and the remaining error values are less than 10%.Thus,the reliability and accuracy of the finite element model for rolling cold plastic deformation are verified to provide the basis for studying the deformation law and the process optimization of C194 copper alloy strip.