A Review on Delamination Failure Analysis and Performance Enhancement of Hybrid Polymer Composite Laminates

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A Review on Delamination Failure Analysis and Performance Enhancement of Hybrid Polymer Composite Laminates

Authors : Dhananjay G. Pardhi , Prashant M. Khanorkar

Abstract – Delamination is one of the most critical failure modes in hybrid polymer composite laminates, occurring when adjacent layers separate at their interfaces due to weak interlinear bonding, manufacturing defects, or mechanical loading. In laminated composite structures, different fiber materials and polymer matrices are combined to achieve improved mechanical performance. However, the mismatch in mechanical and thermal properties between layers often generates interfacial stresses that initiate and propagate delamination. This phenomenon significantly reduces the structural integrity, stiffness, and load-carrying capacity of composite materials. This review paper examines the mechanisms, causes, and analysis of delamination in hybrid polymer composites. Key contributing factors such as manufacturing imperfections, void formation, impact loading, and environmental effects are discussed. The study also highlights the importance of mechanical characterization techniques, including Mode I and Mode II fracture tests, for evaluating interlinear fracture toughness. Various mitigation strategies, including interlinear toughening, fiber hybridization, and optimization of manufacturing parameters, are also discussed. These approaches contribute to improving the mechanical performance and long-term reliability of hybrid polymer composite laminates.