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
收藏
页码：223 / 229
页数：7
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