Loading...

3D Modeling of damage growth and crack initiation using adaptive finite element technique

Moslemi, H ; Sharif University of Technology

1883 Viewed
  1. Type of Document: Article
  2. Abstract:
  3. In this paper, the continuum damage mechanics model originally proposed by Lemaitre (Journal of Engineering Materials and Technology. 1985; 107: 83-89) 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 microcrack 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 several 3D numerical examples
  4. Keywords:
  5. 3-D modeling ; Adaptive finite element ; Adaptive finite element methods ; Adaptive mesh refinement ; Closure effects ; Computational algorithm ; Continuum damage mechanics model ; Continuum damage model ; Damage evolution ; Damage growth ; Damage mechanics ; Damage variables ; Ductile materials ; Engineering materials ; Error estimations ; Numerical example ; Posteriori error estimator ; Propagation criterion ; Superconvergence patch recovery ; Transfer process ; Continuum damage mechanics ; Crack closure ; Crack initiation ; Data transfer ; Mechanics ; Stress corrosion cracking ; Thermoelectricity ; Three dimensional ; Algorithm ; Crack ; Damage ; Ductility ; Finite element method ; Three-dimensional modeling
  6. Source: Scientia Iranica ; Volume 17, Issue 5 A , 2010 , Pages 372-386 ; 10263098 (ISSN)
  7. URL: http://archive.scientiairanica.com/PDF/Articles/00001451/khoei.pdf