کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
511877 865941 2006 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical simulation of low stress triaxiality ductile fracture
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Numerical simulation of low stress triaxiality ductile fracture
چکیده انگلیسی

One of the main shortcoming of existing damage models when applied to the simulation of metal forming operations is their limited validity under low stress triaxiality conditions. An extended Gurson model incorporating the effect of void shape and relative void spacing on the growth and coalescence has been developed in order to encompass both low and large stress triaxiality regimes. The constitutive model has been implemented into an implicit finite element code within a finite strain set up. Identification procedures from experimental data are proposed and illustrated in an application on copper bars exhibiting different strain hardening capacity. A parametric analysis of the damage evolution in specimens deformed under uniaxial tension with necking demonstrates the importance of properly accounting for void shape and void coalescence in the case of large strains problems.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Structures - Volume 84, Issues 26–27, October 2006, Pages 1641–1650
نویسندگان
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