NEW IMPROVEMENTS IN THE MULTI-STEP INVERSE FEM FOR THE FAST FORMABILITY PREDICTION OF MULTI-STEP AUTOBODY STAMING PROCESS

被引:0
|
作者
Tang, Bingtao [1 ]
Lu, Xiaoyang
机构
[1] Shandong Jianzhu Univ, Inst Engn Mech, Fengming Rd Lingang Dev Zone, Jinan 250101, Peoples R China
来源
ENGINEERING PLASTICITY AND ITS APPLICATIONS | 2010年
基金
中国国家自然科学基金;
关键词
Sheet metal forming; Inverse FEM; Constitutive equations; DESIGN;
D O I
暂无
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
In the paper, the multi-step inverse finite element method (FEM) has been introduced to improve the accuracy of simulation in sheet metal stamping. The multi-step inverse FEM can be used to obtain the strain/thickness distribution and shape of blank in the intermediate configurations. An efficient walk-through point location algorithm is used to deal with contact searching problem and restrain the movement of corresponding nodes of intermediate configurations. A constitutive equation based on pseudo deformation theory of plasticity is proposed in order to preserve the computational efficiency of inverse FEM. The presented algorithms are applied to a 2-step cylinder cup deep drawing product. The numerical results compared with explicit dynamic solver LS-DYNA3D confirm its validity in formability prediction of intermediate shapes and final workpiece.
引用
收藏
页码:151 / 155
页数:5
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