کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
500486 863091 2006 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis of fracture in thin shells by overlapping paired elements
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Analysis of fracture in thin shells by overlapping paired elements
چکیده انگلیسی

A finite element methodology for evolution of cracks in thin shells using mid-surface displacement and director field discontinuities is presented. We enrich the mid-surface displacement and director fields of a discrete Kirchhoff–Love quadrilateral element using a piecewise decomposition of element kinematics, which leads to a basis that is a variant of the one used in the extended finite element method. This allows considerable simplifications in the inclusion of the shell director field. A cohesive law is employed to represent the progressive release of the fracture energy. In contrast with previous works, we retain the original quadrature points after the formation of a crack, which, in combination with an elasto-plastic multiplicative decomposition of the deformation gradient, avoids the previously required internal variable mapping during crack evolution. Results are presented for large strain elastic and elasto-plastic crack propagation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 195, Issues 41–43, 15 August 2006, Pages 5343–5360
نویسندگان
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