Intrinsic diagram of sheet metal forming limits for arbitrary strain paths

被引：1

作者：

Fatmaoui, H. ^{[1
]}

Mesrar, R. ^{[1
]}

Chaoufi, J. ^{[1
]}

机构：

[1] Univ Ibn Zohr, Fac Sci, LGMP, Agadir 80000, Morocco

来源：

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS | 2008年 / 222卷 / L4期

关键词：

plasticity criterion; localization analysis; forming limit diagrams;

D O I：

10.1243/14644207JMDA188

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Localized necking in sheets under biaxial tension is analysed by all Marciniak-Kuczynski localization approach (MK-analysis) along with a new plane-stress criterion. Analysis is developed for a rigid viscoplastic behaviour based on flow-theory of plasticity. The model is introduced in numerical calculations to determine forming limits to ductility under linear and non-linear strain paths. However, the results are presented in a new diagram that represent the effective strain as a function of the Current strain-rate ratio. A comparison with classical forming limit diagrams shows the intrinsic character of the new diagram.

引用

页码：223 / 229

页数：7

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