Modeling of crack propagation via an automatic adaptive mesh refinement based on modified superconvergent patch recovery technique |
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Authors: | AR Khoei H Azadi H Moslemi |
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Affiliation: | Center of Excellence in Structural and Earthquake Engineering, Department of Civil Engineering, Sharif University of Technology, P.O. Box 11365-9313, Tehran, Iran |
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Abstract: | In this paper, an automated adaptive remeshing procedure is presented for simulation of arbitrary shape crack growth in a 2D finite element mesh. The Zienkiewicz-Zhu error estimator is employed in conjunction with a modified SPR technique based on the recovery of gradients using analytical crack-tip fields in order to obtain more accurate estimation of errors. The optimization of crack-tip singular finite element size is achieved through the adaptive mesh strategy. Finally, several numerical examples are illustrated to demonstrate the effectiveness, robustness and accuracy of computational algorithm in calculation of fracture parameters and prediction of crack path pattern. |
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Keywords: | Crack propagation Adaptive remeshing Fracture Error control Modified SPR technique |
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