Journal
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
Volume 29, Issue 2, Pages 213-229Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15376494.2020.1758257
Keywords
Polymer-matrix composites; delamination growth; delamination buckling; cohesive zone modeling; VCCT; interface fracture
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In this study, the key parameters of cohesive zone modeling that significantly affect the accuracy in delamination problems were examined. The results showed that the shape and strength of the interface law have a substantial impact on buckling delamination.
In this study, the key parameters of cohesive zone modeling, which significantly affect the accuracy in delamination problems, are examined. The study is performed on various standard fracture toughness specimens subjected to mode I, mode II and mixed mode loading. The compressive buckling of a composite laminate is then modeled and the results are validated using virtual crack closure technique. It is shown that the bi-linear interface law with identified parameters provides the best match for the standard fracture toughness specimens while for buckling delamination the effect of interface law shape and interfacial strength is substantial and cannot be ignored.
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