کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7178383 | 1467102 | 2012 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of microscale inertia on dynamic ductile crack growth
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effects of microscale inertia on dynamic ductile crack growth Effects of microscale inertia on dynamic ductile crack growth](/preview/png/7178383.png)
چکیده انگلیسی
The aim of this paper is to investigate the role of microscale inertia in dynamic ductile crack growth. A constitutive model for porous solids that accounts for dynamic effects due to void growth is proposed. The model has been implemented in a finite element code and simulations of crack growth in a notched bar and in an edge cracked specimen have been performed. Results are compared to predictions obtained via the Gurson-Tvergaard-Needleman (GTN) model where micro-inertia effects are not accounted for. It is found that microscale inertia has a significant influence on the crack growth. In particular, it is shown that micro-inertia plays an important role during the strain localisation process by impeding void growth. Therefore, the resulting damage accumulation occurs in a more progressive manner. For this reason, simulations based on the proposed modelling exhibit much less mesh sensitivity than those based on the viscoplastic GTN model. Microscale inertia is also found to lead to lower crack speeds. Effects of micro-inertia on fracture toughness are evaluated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanics and Physics of Solids - Volume 60, Issue 4, April 2012, Pages 665-690
Journal: Journal of the Mechanics and Physics of Solids - Volume 60, Issue 4, April 2012, Pages 665-690
نویسندگان
N. Jacques, S. Mercier, A. Molinari,