Variationally consistent eXtended FE model for 3D planar and curved imperfect interfaces

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• 作者：Elena Benvenuti ; Giulio Ventura ; Nicola Ponara ; Antonio Tralli
• 关键词：3D ; Cohesive ; Interface ; XFEM ; Spring model
• 刊名：Computer Methods in Applied Mechanics and Engineering
• 出版年：1 December, 2013
• 年：2013
• 卷：267
• 期：Complete
• 页码：434-457
• 全文大小：5388 K

文摘

We propose an eXtended Finite Element Method convergent to the asymptotic solution of a thin interface problem for both planar and curved imperfect interfaces in three dimensions. The main advantage over standard cohesive-zone models is the bulk-mesh size independence. With respect to standard eXtended Finite Element Method, in the proposed procedure, blending and quadrature sub-domains are not required. The focus is on the evaluation of the accuracy of the proposed approach in solving three-dimensional benchmark tests. The numerical results are compared with those available from analytical solutions and spring-like interface models.