Failure Assessment of CFRP Skinned Honeycomb Sandwich Beam With Delamination Using Cohesive Zone Model
Cohesive zone model to capture the failure behaviour and strength of CFRP skinned cantilever sandwich beam with delamination is carried out and verified through test. The inputs required to represent the interfacial behaviour between the skin and honeycomb core in cohesive zone model are determined by standard tests. Acoustic emission was monitored during the test. Comparison of the load-displacement response obtained shows a good agreement with the experimental result. Both the test and analysis show a buckling induced delamination resulting earlier buckling failure of the specimen. Prediction of failure load based on nonlinear buckling analysis with CZM and without CZM approach shows a deviation of 6 % and 9% respectively with the test.