Abstract
The finite cover method (FCM), which is a cover-based generalized finite element method, is extended for analyses of progressive failure processes involving cohesive zone fracture, starting from an interface debonding and evolving toward one of the constituents of heterogeneous solids and structures. Assuming that the constituents fail according to the maximum principal stress, we are able to represent the evolution of the resulting failure surfaces of discontinuity independent of mesh alignment owing to the distinctive features of the FCM. Also, interface elements with Lagrange multipliers are introduced to impose compatibility conditions on the material interface so that debonding is judged by the multipliers. Representative numerical examples demonstrate the capability of the proposed method in tracing the smooth transition of crack paths from interfacial to internal failure, and vice versa.
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Terada, K., Ishii, T., Kyoya, T. et al. Finite cover method for progressive failure with cohesive zone fracture in heterogeneous solids and structures. Comput Mech 39, 191–210 (2007). https://doi.org/10.1007/s00466-005-0017-6
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DOI: https://doi.org/10.1007/s00466-005-0017-6