کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1562169 999580 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Three-dimensional modeling to compute plastic zone in front of crack in compact tension sample of multiphase material
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
Three-dimensional modeling to compute plastic zone in front of crack in compact tension sample of multiphase material
چکیده انگلیسی

Two-dimensional modeling to compute plastic zone in front of a crack in a compact tension specimen of a multiphase material was published previously. This paper is the continuation of it, using the same concept, but in three dimensions. The heart of this study is to develop a simulation method to predict the effect of microstructural morphology in multiphase steel in three dimensions utilizing commercial software.The object of the model, multiphase of ferrite and martensite, is known to benefit its fatigue performance by its high toughness yet maintains the high tensile properties due to controlled microstructure. Multiphase steel having a microstructure consisting of polygonal ferrite and martensite has received a great deal of attention due to their useful combination of high strength, high work hardening rate, and ductility. From the fracture mechanics point of view, the key to its fatigue performance is the large plastic zone size in front of the crack. In this research, a sub-modeling technique is used, by using three-dimensional modeling of cube with variation of ferrite fraction as local models. The global model, a compact tension specimen, is treated as a homogeneous material. The results show strong correlation and similarity with that of two-dimensional model. The analysis result shows the variation of the plastic zone sizes as the ferrite fraction varies and saturates at about 60% ferrite fraction.

Research highlights▸ A simulation method to predict the effect of microstructural morphology in multiphase steel in three-dimensions utilizing commercial software was performed. ▸ A sub-modeling technique was used; which is by using three-dimensional modeling of cube with variation of ferrite fraction as local models and compact tension sample as a global model. ▸ The result shows the variation of the plastic zone sizes as the ferrite fraction varies and saturates at about 60% ferrite fraction, in agreement with two dimensional modeling.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 50, Issue 4, February 2011, Pages 1499–1503
نویسندگان
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