Study on superplastic blow-forming of 8090 Al-Li sheets in an ellip-cylindrical closed-die

被引：13

作者：

Hwang, YM ^{[1
]}

Lay, HS ^{[1
]}

Huang, JC ^{[1
]}

机构：

[1] Natl Sun Yat Sen Univ, Dept Mech Engn, Kaohsiung 804, Taiwan

来源：

INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE | 2002年 / 42卷 / 12期

关键词：

superplastic blow-forming; finite element analysis; ellip-cylindrical closed-die;

D O I：

10.1016/S0890-6955(02)00055-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The purpose of this paper is to explore the plastic deformation behavior of the sheet during blow-forming of a superplastic sheet into an ellip-cylindrical closed-die by the finite element method. A finite element commercial code "DEFORM" is used to carry out the simulations and calculate the pressurization profile and sheet thickness distribution during the blow-forming process. A pressure control algorithm is proposed to keep the maximum strain rate in the deformation zone of the sheet equal to the target value, which corresponds to the highest in value of the material being superplastically formed. The effects of various forming conditions, such as the friction coefficient between the sheet and die and the aspect ratio of the die, on the forming pressure and thickness distribution of the product are discussed. Experiments using 8090 Al-Li sheets on superplastic blow-forming in an ellip-cylindrical closed-die are also carried out. The theoretical predictions of thickness distribution of the product are compared with experimental results. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1363 / 1372

页数：10

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