Loading...
Search for:
cohesive-interface
0.01 seconds
3D modeling of cohesive crack growth in partially saturated porous media: A parametric study
, Article Engineering Fracture Mechanics ; Vol. 124-125, issue , 2014 , pp. 272-286 ; ISSN: 00137944 ; Khoei, A. R ; Sharif University of Technology
Abstract
In this paper, the 3D cohesive crack propagation is presented in partially saturated porous media. The double-nodded zero-thickness cohesive interface elements are employed to capture the mixed mode fracture behavior. In order to describe the behavior of fractured media, two balance equations are applied similar to those employed for the mixture of solid-fluid phase in semi-saturated media, including: the momentum balance of fractured media, and the balance of fluid mass within the fracture. Crack permeability is modified based on the data obtained from experimental results to consider the roughness of fracture walls effect
Modeling of dynamic cohesive fracture propagation in porous saturated media
, Article International Journal for Numerical and Analytical Methods in Geomechanics ; Volume 35, Issue 10 , 2011 , Pages 1160-1184 ; 03639061 (ISSN) ; Barani, O. R ; Mofid, M ; Sharif University of Technology
2011
Abstract
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...