锻压技术

一种考虑包辛格效应的等效拉深筋模型

英文标题：An equivalent drawbead model considering Bauschinger effect

作者：韩超董湘怀

单位：上海交通大学

分类号：TG386.3+2

出版年,卷(期):页码：2017,42(4):33-39

摘要：

基于Voce各向同性硬化模型和Armstrong-Frederic随动硬化模型，建立了一个考虑包辛格效应影响的混合硬化模型，并通过CR4钢板的拉压循环实验验证了该混合硬化模型的准确性。将该混合硬化模型引入Stoughton等效拉深筋阻力模型，替换原有的各向同性硬化模型，考虑包辛格效应的影响对该等效拉深筋阻力模型进行了改进。利用专门设计的拉深筋阻力测定装置，针对矩形拉深筋和半圆形拉深筋，分别获取了不同几何结构参数下的拉深筋阻力，经实验验证，改进后的等效拉深筋模型能够有效地提高拉深筋阻力的计算精度。

Based on Voce isotropic hardening model and Armstrong-Frederic nonlinear kinematic hardening model, a combined hardening model considering Bauschinger effect was proposed, and its veracity was verified by tension-compression tests for CR4 sheet metal. Then, the combined hardening model was introduced into the Stoughton equivalent drawbead model to replace the original isotropic hardening model, which improved the model by considering Bauschinger effect. For the rectangle and semicircle drawbeads, the drawbead restraining forces with different geometry parameters were obtained by the specially designed drawbead restraining force test device. The comparative results between calculation and experiment show that the drawbead restraining force predicted by the modified equivalent drawbead model is more accurate than that by the original model.

基金项目：

国家自然科学基金资助项目(51275297)

韩超(1991-)，男，硕士研究生 E-mail：hanchao@sjtu.edu.cn 通讯作者：董湘怀(1955-)，男，博士，教授 E-mail：dongxh@sjtu.edu.cn

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