Predicting Interfacial Failure in Laminate Composite by using the Finite Element Method (FEM) : A Cohesive Zone Modeling Approach for Delamination

Abstract

This study explores the interfacial failure modes of laminate composite, focusing ondelamination and debonding. To simulate these failures, a cohesive zone model (CZM) is employed, witha key component being the traction-separation law that characterizes softening near the delamination tip.The study demonstrates the modeling of debonding using the COMSOL® 5.6 software based on theFinite Element Method (FEM) decohesion model. The CZM's effectiveness in predicting mixed-modesoftening and delamination propagation is showcased through a model of mixed-mode bending in acomposite beam. By subjecting the beam to various loading conditions, the CZM accurately predictssoftening behavior and delamination progression. This research highlights the CZM's value inunderstanding and predicting interfacial failure, enabling improved design and structural integrity oflaminate structures.