锻压技术

工业纯钛TA1薄板杯突试验及其数值模拟

英文标题：Erichsen test and numerical simulation of commercial pure titanium TA1 sheets

作者：梁鹏飞1 2 陈拂晓1 2 郭俊卿1 2

分类号：

出版年,卷(期):页码：2016,41(4):45-48

摘要：

在BHB-80板料双向拉伸试验机上，对厚度分别为0.8，1.0和2.0 mm的工业纯钛TA1薄板进行了室温条件下的杯突试验。试验结果表明，3种厚度TA1薄板的杯突值（IE值）分别为11.00，11.10和11.90 mm，并且随着板料厚度的增加，杯突值随之增加。此外，在试验基础上利用有限元分析软件对TA1板的成形过程进行数值模拟，采用最大凸模力准则获得了虚拟的杯突值，分析了变形过程中等效应变的分布，并预测了试件开裂的部位。模拟结果表明，虚拟杯突值要小于试验获得的杯突值，但不改变板厚对杯突值的影响规律；随着变形增加，最大等效应变区发生转移；预测的开裂部位与试验结果一致。

The Erichsen tests of commercial pure titanium TA1 sheets were conducted by BHB-80 biaxial tensile tester under room temperature with thicknesses of 0.8, 1.0 and 2.0 mm respectively. The test results show that their cupping values(IE values) are 11.00,11.10 and 11.90 mm respectively，and the IE values increase with the increase of sheet thickness. In addition, based on the experiment, the forming processes of TA1 sheets were simulated by finite element method (FEM), and virtual IE values were obtained by the maximum punch force criterion (MPFC). Furthermore, the distribution of the effective strain was analyzed, and the fracture positions were predicted. The simulation results show that the virtual IE value is smaller than that obtained by testing, and the influence of sheet thickness on it is unchanged. With the increase of deformation, the areas of the maximum effective strain shifts, and the predicted fracture position is the same as the experimental results.

基金项目：

河南省基础与前沿技术研究计划项目（112300413227）

梁鹏飞（1990-），男，硕士研究生

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