Analytical and experimental studies of necking in sheet metal forming processes

被引：51

作者：

Brunet, M ^{[1
]}

Mguil, S ^{[1
]}

Morestin, F ^{[1
]}

机构：

[1] INSA 304, Mecan Solides Lab, F-69621 Villeurbanne, France

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 1998年 / 80-1卷

关键词：

necking criterion; correlation technique; damage model; aluminum; mild-steel;

D O I：

10.1016/S0924-0136(98)00131-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two approaches are detailed for the determination of forming limit diagrams (FLD). The first one is experimental: a correlation technique has been developed for the displacement field measurement on a sheet. The second approach is theoretical: a necking criterion based on the load-instability and plane strain localization assumptions is proposed. It includes the possibility to introduce the modified Gurson-Tvergaard damage model taking account Hill's or Barlat and Lian's anisotropy. The criterion is written in an intrinsic form and is applicable to linear strain paths as well as to non-linear strain paths. Finally, the FLD for three aluminum sheets and a mild-steel sheet obtained by experimental and theoretical ways are compared. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：40 / 46

页数：7

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