کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7178588 1467423 2018 35 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multiscale modeling of rapid failure in brittle solids: Branching instabilities
ترجمه فارسی عنوان
مدل سازی چند ضلعی شکست سریع در جامدات شکننده: عدم توانایی شاخه
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
The contribution presents results on the modeling of fracture instabilities with a dynamic two-scale damage approach. The evolution law for damage is deduced by homogenization from small-scale descriptions of mode I dynamic propagation of micro-cracks. The model is sensitive with respect to the size of the microstructure through a length parameter present in the damage law. We study the macroscopic failure evolution in brittle solids and the development of associated instabilities like micro-branching. The results of numerical simulations for a reduced-size specimen are compared with experimental results for tensile fracture of PMMA and it is shown that the damage model is able to reproduce the observed micro-branching instabilities and the corresponding crack speed evolutions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanics of Materials - Volume 116, January 2018, Pages 77-89
نویسندگان
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