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3D modeling of damage growth and ductile crack propagation using adaptive FEM technique

Moslemi, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. In this paper, the continuum damage mechanics model originally proposed by Lemaitre [1] is presented through an adaptive finite element method for three-dimensional ductile materials. The macro-crack initiation-propagation criterion is used based on the distribution of damage variable in the continuum damage model. The micro-crack closure effect is incorporated to simulate the damage evolution more realistic. The Zienkiewicz-Zhu posteriori error estimator is employed in conjunction with a weighted superconvergence patch recovery (SPR) technique at each patch to improve the accuracy of error estimation and data transfer process. Finally, the robustness and accuracy of proposed computational algorithm is demonstrated by a 3D numerical example
  4. Keywords:
  5. Adaptive mesh refinement ; Crack closure ; Crack initiation ; Damage mechanics ; Weighted SPR technique ; 3-d modeling ; Adaptive finite element methods ; Closure effects ; Computational algorithm ; Continuum damage mechanics model ; Continuum damage model ; Damage evolution ; Damage growth ; Damage variables ; Ductile materials ; FEM techniques ; Numerical example ; Posteriori error estimator ; Superconvergence patch recovery ; Transfer process ; Data transfer ; Finite element method ; Three dimensional
  6. Source: Computational Plasticity XI - Fundamentals and Applications, COMPLAS XI ; 2011 , Pages 996-1007 ; 9788489925731 (ISBN)
  7. URL: http://en.journals.sid.ir/ViewPaper.aspx?ID=183713