کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5026881 1470629 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Coupled ASB-and-microvoiding-assisted Dynamic Ductile Failure
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Coupled ASB-and-microvoiding-assisted Dynamic Ductile Failure
چکیده انگلیسی

Adiabatic shear banding (ASB) is a dynamic localization phenomenon resulting from thermomechanical instability under high strain rate and low stress triaxiality loading conditions. High strength, steels and lightweight alloys of titanium and aluminum are highly susceptible to this phenomenon which leads to premature material failure. At an advanced stage of the localization process, the adiabatic shear bands have been shown to contain micro-voids which coalesce to form cracks and ultimately lead to the fracture of the structure. A physics-motivated, unified constitutive model accounting for the coupled effects of ASB and micro-voiding has been developed in the context of large deformation, high strain rate and high temperature rise. The enlarged model is herein implemented as user material into the engineering finite element (FE) computation code LS-DYNA in the context of standard FE kinematic formulation and its performances are assessed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Procedia Engineering - Volume 197, 2017, Pages 60-68
نویسندگان
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