Fracture prediction in stretch forming using finite element simulation combined with ductile fracture criterion

被引：21
|
作者：
Takuda, H [1 ]
Mori, K [1 ]
Fujimoto, H [1 ]
Hatta, N [1 ]
机构：
[1] OSAKA UNIV,DEPT ENGN MECH,TOYONAKA,OSAKA 560,JAPAN
来源：
ARCHIVE OF APPLIED MECHANICS | 1997年 / 67卷 / 03期
关键词：
sheet metal forming; forming limit; ductile fracture criterion; FEM; stretch forming;
D O I：
10.1007/s004190050106
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A criterion for ductile fracture is introduced in the finite element simulation of sheet metal forming. From the calculated histories of stress and strain in each element, the fracture initiation site and the critical stroke are predicted by means of the ductile fracture criterion. The calculations are carried out for axisymmetric stretch forming of various aluminium alloy sheets and their laminates clad by mild steel sheets. The predictions so obtained are compared with experimental observations. The results show that the combination of the finite element simulation and the ductile fracture criterion enables the prediction of forming limit in a wide range of sheet metals.
引用
收藏
页码：143 / 150
页数：8
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