Prediction of Forming Limit Diagram for Seamed Tube Hydroforming Based on Thickness Gradient Criterion

被引:4
|
作者
Chen, Xianfeng [1 ]
Lin, Zhongqin [1 ]
Yu, Zhongqi [1 ]
Chen, Xinping [2 ]
Li, Shuhui [1 ]
机构
[1] Shanghai Jiao Tong Univ, Shanghai Key Lab Digital Autobody Engn, Shanghai 200240, Peoples R China
[2] Shanghai Baoshan Iron & Steel Co Ltd, Shanghai 201900, Peoples R China
来源
8TH INTERNATIONAL CONFERENCE AND WORKSHOP ON NUMERICAL SIMULATION OF 3D SHEET METAL FORMING PROCESSES (NUMISHEET 2011), PTS A AND B | 2011年 / 1383卷
基金
中国国家自然科学基金;
关键词
Forming limit diagram (FLD); Seamed tube; Tube hydroforming; Thickness gradient criterion (TGC); TUBULAR MATERIALS; FORMABILITY;
D O I
10.1063/1.3623669
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
This study establishes the forming limit diagram (FLD) for QSTE340 seamed tube hydroforming by finite element method (FEM) simulation. FLD is commonly obtained from experiment, theoretical calculation and FEM simulation. But for tube hydroforming, both of the experimental and theoretical means are restricted in the application due to the equipment costs and the lack of authoritative theoretical knowledge. In this paper, a novel approach of predicting forming limit using thickness gradient criterion (TGC) is presented for seamed tube hydroforming. Firstly, tube bulge tests and uniaxial tensile tests are performed to obtain the stress-strain curve for tube three parts. Then one FE model for a classical tube free hydroforming and another FE model for a novel experimental apparatus by applying the lateral compression force and the internal pressure are constructed. After that, the forming limit strain is calculated based on TGC in the FEM simulation. Good agreement between the simulation and experimental results is indicated. By combining the TGC and FEM, an alternative way of predicting forming limit with enough accuracy and convenience is provided.
引用
收藏
页码:653 / +
页数:2
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