Experimental and analytical necking studies of anisotropic sheet metals

被引：93

作者：

Brunet, M ^{[1
]}

Morestin, F ^{[1
]}

机构：

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

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2001年 / 112卷 / 2-3期

关键词：

necking criterion; correlation technique; damage model; sheet-metals; plastic anisotropy; forming limit diagrams;

D O I：

10.1016/S0924-0136(01)00578-7

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 (FLDs). 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 localisation assumption is proposed. It includes the possibility to introduce the modified Gurson-Tvergaard damage model taking account the Hill's or others anisotropic yield surfaces and the influence of triaxial stress state in the neck. The criterion is written in an intrinsic form and is as well applicable to linear strain paths as well as to non-linear strain paths. Finally, the FLDs for an aluminium alloy, a mild steel and a titanium alloy obtained by experimental and theoretical ways are compared. (C) 2001 Elsevier Science B.V. Ah rights reserved.

引用

页码：214 / 226

页数：13

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