A numerical method, using a special mixed finite element associated with the virtual crack extension technique, has been developed to evaluate the energy release rate for kinking cracks. The element is two dimensional 7-node mixed finite element with 5 displacement nodes and 2 stress nodes. The mixed finite element ensures the continuity of stress and displacement vectors on the coherent part and the free edge effect. This element has been formulated starting from a parent element in a natural plane with the aim to model different types of cracks with various orientations. Example problems with kinking cracks in a homogeneous material and bimaterial are presented to assess the computational accuracies.
Bouziane Salah, Bouzerd Hamoudi, Boulares Noureddine : Department of Civil Engineering, University of 20 August 1955 Skikda, Skikda, Algeria
Guenfoud Mohamed : Laboratory of Civil Engineering and Hydraulics, University of Guelma, Guelma, Algeria
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