کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9708877 | 1466792 | 2005 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Failure analysis of anisotropic sheet-metals using a non-local plastic damage model
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
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چکیده انگلیسی
A ductile damage model which takes account of void shape effect and anisotropy of the matrix material is integrated into an explicit finite element framework to predict the damage evolution which occurs under crash or stamping process. The void coalescence failure mechanism by internal necking is also considered by using a modified Thomason's plastic limit-load model. The pathological mesh dependence has been overcome by a non-local approach where the Laplacians of the effective plastic strain and of the porosity are incorporated. In this paper, the implicit gradient formulation constitutes an additional partial differential equation of the Helmholtz type which is solved separately by a boundary element method (BEM). The presented formulation is applied to a mild-steel, a Ni-based sheet-metal (INCO 718) and an aluminium alloy (AA 5182). The effectiveness of the numerical predictions is verified carrying out a set of experimental tests with a flat-headed punch.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 170, Issues 1â2, 14 December 2005, Pages 457-470
Journal: Journal of Materials Processing Technology - Volume 170, Issues 1â2, 14 December 2005, Pages 457-470
نویسندگان
M. Brunet, F. Morestin, H. Walter-Leberre,