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Three-dimensional cohesive fracture modeling of non-planar crack growth using adaptive FE technique

Khoei, A. R ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijsolstr.2012.04.036
  3. Publisher: 2012
  4. Abstract:
  5. In this paper, the three-dimensional adaptive finite element modeling is presented for cohesive fracture analysis of non-planer crack growth. The technique is performed based on the Zienkiewicz-Zhu error estimator by employing the modified superconvergent patch recovery procedure for the stress recovery. The Espinosa-Zavattieri bilinear constitutive equation is used to describe the cohesive tractions and displacement jumps. The 3D cohesive fracture element is employed to simulate the crack growth in a non-planar curved pattern. The crack growth criterion is proposed in terms of the principal stress and its direction. Finally, several numerical examples are analyzed to demonstrate the validity and capability of proposed computational algorithm. The predicted crack growth simulation and corresponding load-displacement curves are compared with the experimental and other numerical results reported in literature
  6. Keywords:
  7. 3D curved crack growth ; 3-D curved cracks ; Adaptive finite element ; Adaptive mesh refinement ; Cohesive fracture ; Cohesive tractions ; Cohesive zone model ; Computational algorithm ; Crack growth simulation ; Curved patterns ; Displacement jump ; Error estimators ; Load-displacement curve ; Numerical example ; Numerical results ; Principal stress ; Stress recovery ; Superconvergent patch recovery ; Weighted SPR technique ; Fracture ; Numerical analysis ; Three dimensional
  8. Source: International Journal of Solids and Structures ; Volume 49, Issue 17 , September , 2012 , Pages 2334-2348 ; 00207683 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0020768312001898