Numerical Prediction of Fatigue Damage Progress in Holed CFRP Laminates Using Cohesive Elements

Shigeki Yashiro, Tomonaga Okabe

Research output: Contribution to journalArticle

Abstract

This study presents a numerical simulation to predict damage progress in notched composite laminates under cyclic loading by using a cohesive zone model. A damage-mechanics concept was introduced directly into the fracture process in the cohesive elements in order to express crack growth by cyclic loading. This approach then conformed to the established damage mechanics and facilitated understanding the procedure and reducing computation costs. We numerically investigated the damage progress in holed CFRP cross-ply laminates under tensile cyclic loading and compared the predicted damage patterns with experiment results. The predicted damage patterns agreed with the experiment results that exhibited the extension of multiple types of damage (splits, transverse cracks, and delamination) near the hole. A numerical study indicated that the change in the distribution of in-plane shear stress due to delamination induced the extension of splits and transverse cracks near the hole.
Original languageEnglish
Pages (from-to)1212-1221
Number of pages10
JournalJSMME
Volume3
Issue number11
DOIs
Publication statusPublished - Nov 2009

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