Modeling of cohesive crack growth using an adaptive mesh refinement via the modified-SPR technique |
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Authors: | A R Khoei H Moslemi K Majd Ardakany O R Barani H Azadi |
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Affiliation: | 1.Center of Excellence in Structural and Earthquake Engineering, Department of Civil Engineering,Sharif University of Technology,Tehran,Iran |
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Abstract: | In this paper, an adaptive finite element procedure is presented in modeling of mixed-mode cohesive crack propagation via
the modified superconvergent path recovery technique. The adaptive mesh refinement is performed based on the Zienkiewicz–Zhu
error estimator. The weighted-SPR recovery technique is employed to improve the accuracy of error estimation. The Espinosa–Zavattieri
bilinear cohesive zone model is applied to implement the traction-separation law. It is worth mentioning that no previous
information is necessary for the path of crack growth and no region of the domain is necessary to be filled by the cohesive
elements. The maximum principal stress criterion is employed for predicting the direction of extension of the cohesive crack
in order to implement the cohesive elements. Several numerical examples are analyzed numerically to demonstrate the capability
and efficiency of proposed computational algorithm. |
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