Investigation of interlayering effect on the mechanical properties and interlaminar fracture toughness of laminated composites: A review

Document Type : Research Paper

Authors

1 Department of Mechanical Engineering, Arak University of Technology, Arak, Iran.

2 1Department of Mechanical Engineering, Arak University of Technology, Arak, Iran.

Abstract

This study investigates the impact of interlayering on the interlaminar fracture toughness of laminated composites. Laminated composites are prone to delamination due to the different behavior of their constituents and poor adhesive bonding between layers. Delamination is the most common failure mechanism in these composites. Different solutions have been proposed to strengthen them against delamination, including fiber surface modification, matrix enhancement, and Z-Pinning. Among these solutions, interlayering has the greatest influence on maintaining the longitudinal properties of the composites. To improve interlaminar fracture toughness, good adhesion with other layers, high strength to resist crack growth, and prevention of nanoparticle agglomeration are essential. Interlayers can take different forms in terms of material and geometry. The research findings suggest hybrid interlayers composed of polymer and nanoparticles have the best influence on interlaminar fracture toughness. Also, in terms of geometry, interlayers with appropriate porosity and a 3D network, such as Buckypapers, yield the best results.

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