Computational Methods for Debonding in Composites

7 Interaction Between Intraply and Interply Failure in Laminates 159
Both the delamination model and the softening plasticity model, put a serious
restriction on the maximum element size in the regions where failure occurs. The
cohesive zone in delamination and the localization band in intraply failure have to be
spanned by more than one element. In the already relatively costly three dimensional
framework, which is necessary to cover all possible failure events, this means that
there is a limit to the size of the structure that can be analyzed without excessive
growth of computation time.
Acknowledgements This research is supported by the Technology Foundation STW (under grant
DCB.6623) and the Ministry of Public Works and Water Management, The Netherlands.
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