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Modeling of dynamic cohesive fracture propagation in porous saturated media

Khoei, A. R ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1002/nag.955
  3. Publisher: 2011
  4. Abstract:
  5. In this paper, a mathematical model is presented for the analysis of dynamic fracture propagation in the saturated porous media. The solid behavior incorporates a discrete cohesive fracture model, coupled with the flow in porous media through the fracture network. The double-nodded zero-thickness cohesive interface element is employed for the mixed mode fracture behavior in tension and contact behavior in compression. The crack is automatically detected and propagated perpendicular to the maximum effective stress. The spatial discretization is continuously updated during the crack propagation. Numerical examples from the hydraulic fracturing test and the concrete gravity dam show the capability of the model to simulate dynamic fracture propagation. The comparison is performed between the quasi-static and fully dynamic solutions, and the performance of two analyses is investigated on the values of crack length and crack mouth opening
  6. Keywords:
  7. Cohesive interface element ; Saturated porous media ; Cohesive fracture ; Cohesive fracture model ; Cohesive interface ; Concrete gravity dams ; Contact behavior ; Crack length ; Crack mouth ; Dynamic fractures ; Dynamic solutions ; Effective stress ; Flow in porous media ; Fracture network ; Mixed mode fracture ; Modeling of dynamics ; Numerical example ; Quasi-static ; Saturated media ; Spatial discretizations ; Crack detection ; Cracks ; Dynamic analysis ; Gravity dams ; Hydraulic fracturing ; Mathematical models ; Porous materials ; Fracture ; Cohesive soil ; Compression ; Crack propagation ; Dynamic analysis ; Numerical model ; Porous medium ; Saturated medium
  8. Source: International Journal for Numerical and Analytical Methods in Geomechanics ; Volume 35, Issue 10 , 2011 , Pages 1160-1184 ; 03639061 (ISSN)
  9. URL: http://onlinelibrary.wiley.com/doi/10.1002/nag.955/abstract