Application of cohesive element approach to analysis of delamination buckling and propagation in honeycomb panels

T.-S. Han, A.R. Ingraffea & S.L. Billington (School of Civil and Environmental Engineering, Cornell University, Ithaca, NY, USA)

The cohesive element approach is proposed as a tool for simulating delamination propagation between a facesheet and a core in a honeycomb core composite panel. The cohesive model has two parameters (critical energy release rate (Gc) and tensile strength (_c)), and the parameters are selected from the experiments. The proposed model is validated by simulating the 914_914 mm (36_36 in.) debond panel experiment under edge compression loading. It is concluded that the cohesive element approach can predict delamination propagation of a honeycomb panel with reasonable accuracy.

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