کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
774803 1463110 2014 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A finite strain continuum damage model for simulating ductile fracture in steels
ترجمه فارسی عنوان
یک مدل آسیب ناپیوسته برای مدل سازی شبیه سازی شکستگی ورقه ای در فولاد
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• A new elastoplastic-damage model for modeling ductile fracture in steels is proposed.
• Scalar damage variable is used to model microvoid nucleation, growth and coalescence.
• Numerical algorithm for model implementation is presented and implemented.
• The constitutive parameters are calibrated and validated for A36 structural steels.

A new coupled plasticity-damage model is proposed within a finite deformation framework for modeling ductile fracture in ASTM A36 structural steels. Damage mechanics principles of effective stress and strain equivalence are employed to formulate a new constitutive model for simulating damage due to the physical processes associated with microvoid nucleation, growth and coalescence. A scalar damage variable is used to track the micro-structural changes that occur during the ductile fracture process. The model is calibrated and validated by comparing its response to the results obtained from experimental testing of four symmetrically and asymmetrically notched ASTM A36 steel specimens. The proposed model is shown to successfully model failure due to ductile fracture under stress states typically observed in structural engineering applications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Fracture Mechanics - Volume 116, January 2014, Pages 172–189
نویسندگان
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