锻压技术

各向异性屈服函数及其参数识别方法对成形极限预测的影响

英文标题：Influence of anisotropic yield function and parameter identification method on forming limit prediction

作者：朱杰黄尚宇刘维胡建华邹希凡

单位：武汉理工大学

分类号：TG301

出版年,卷(期):页码：2018,43(6):151-155

摘要：

为准确预测金属板料各向异性行为，各向异性屈服准则一般要引入一定参数，在参数识别过程中要使用到一定试验数据。等双轴拉伸试验数据是经常被使用在参数识别中的数据之一。但由于等双轴拉伸试验或参数逆向识别方法的复杂性，采用平面应变试验与标准单轴拉伸试验相结合的方法，进行各向异性屈服函数的参数识别。针对Yld2000-2d屈服函数，分别基于等双拉试验数据和平面应变试验数据进行了参数识别，并将识别的Yld2000-2d屈服函数用于M-K模型，完成了AA5182-O铝合金和TRIP780钢两种板料成形极限的数值预测。通过与实验结果及Mises和Hill48屈服函数预测值的对比，验证了Yld2000-2d屈服函数的准确性以及采用平面应变数据进行参数识别的有效性。

Certain parameters should be introduced to anisotropic yield criteria to accurately predict anisotropic behavior of metal sheets, and some experiment data should be applied in the process of parameter identification. And the data of the equibiaxial tensile test is one of the data that are usually used in parameter identification. However, due to the complexity of equibiaxial tensile test and parameter inverse identification, parameter identification of anisotropic yield function was conducted by the method of plane strain test combined with standardized uniaxial tensile test. For the Yld2000-2d yield function, the parameters were identified by equibiaxial tensile test data and plane strain test data respectively, and the identified Yld2000-2d yield function was implemented in MK model to numerically predict the forming limit of aluminum alloy sheet AA5182-O and steel sheet TRIP780. By comparing with the experimental results and the prediction value obtained by Mises and Hill48 yield functions, the accuracy of Yld2000-2d yield function and the effectiveness of parameter identification by plane strain data were verified.

基金项目：

国家自然科学基金资助项目（51475345）；华中科技大学材料成形与模具技术国家重点实验室开放基金（P2018-013）

朱杰（1993-），男，硕士研究生；Email：zhujie1604@edu.cn；通讯作者：刘维（1986-），男，博士，讲师；Email:weiliu@whut.edu.cn

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