کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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500486 | 863091 | 2006 | 18 صفحه PDF | دانلود رایگان |

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.
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 195, Issues 41–43, 15 August 2006, Pages 5343–5360