Delamination Buckling and Propagation Analysis of Honeycomb Panels Using a Cohesive Element Approach
Resource
International Journal of Fracture 115 (2): 101-123
Journal
International Journal of Fracture
Journal Volume
115
Journal Issue
2
Pages
101-123
Date Issued
2002
Date
2002
Author(s)
Abstract
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. To determine the critical energy release rate (Gc) of the cohesive model, Double Cantilever Beam (DCB) fracture tests were performed. The peak strength (σc) of the cohesive model was determined from Flatwise Tension (FWT) tests. The DCB coupon test was simulated using the measured fracture parameters, and sensitivity studies on the parameters for the cohesive model of the interface element were performed. The cohesive model determined from DCB tests was then applied to a full-scale, 914 × 914 mm (36 × 36 in.) debond panel under edge compression loading, and results were compared with an experiment. It is concluded that the cohesive element approach can predict delamination propagation of a honeycomb panel with reasonable accuracy.
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Type
journal article
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