Journal
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
Volume 63, Issue 5, Pages 760-788Publisher
WILEY
DOI: 10.1002/nme.1305
Keywords
extended finite element method; three-dimensional solids; continuum damage mechanics; cohesive law
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We present a new formulation and a numerical procedure for the quasi-static analysis of three-dimensional crack propagation in brittle and quasi-brittle solids. The extended finite element method (XFEM) is combined with linear tetrahedral elements. A viscosity-regularized continuum damage constitutive model is used and coupled with the XFEM formulation resulting in a regularized 'crack-band' version of XFEM. The evolving discontinuity surface is discretized through a C-0 surface formed by the union of the triangles and quadrilaterals that separate each cracked element in two. The element's properties allow a closed form integration and a particularly efficient implementation allowing large-scale 3D problems to be studied. Several examples of crack propagation are shown, illustrating the good results that can be achieved. Copyright (c) 2005 John Wiley & Sons, Ltd.
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