An enriched cohesive zone model for delamination in brittle interfaces

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Abstract

Application of standard cohesive zone models in a finite element framework to simulate delamination in brittle interfaces may trigger non-smooth load-displacement responses that lead to the failure of iterative solution procedures. This non-smoothness is an artifact of the discretization; and hence it can be avoided by sufficiently refining the mesh leading to unacceptably high computational costs and a low efficiency and robustness. In this paper, a process-driven hierarchical extension is proposed to enrich the separation approximation in the process zone of a cohesive crack. Some numerical examples show that instead of mesh refinement, a more efficient enriched formulation can be used to prevent a non-smooth solution.
Original languageEnglish
Pages (from-to)609-630
JournalInternational Journal for Numerical Methods in Engineering
Volume80
Issue number5
DOIs
Publication statusPublished - 2009

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