Development and modeling of interfacially engineered composites with designed failure

Marton, Gergő Zsolt and Szebényi, Gábor (2025) Development and modeling of interfacially engineered composites with designed failure. In: 4th International Conference on Composite Materials, 2025.08.04-2025.08.08., Baltimore.

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Abstract

There is a growing demand to increase the reliability of polymer composite materials by modifying their failure behavior. In this study, we developed and investigated a method that can be used to influence the damage processes and failure behaviour of composites by locally applying polycaprolactone (PCL) interlayer material. We manufactured locally interfacially engineered UD carbon/epoxy composite plates and conducted short-beam shear tests to investigate the effects related to the application and the geometry of PCL on the interlaminar shear strength, the damage processes and the final failure of the composite in case of interlaminar loading. Furthermore, we carried out finite element modeling using the cohesive zone method (CZM) to analyze the influence of PCL interlayer material on the initiation and propagation of damage. The results show that the application of PCL is suitable for modifying the damage and failure processes of UD carbon/epoxy composites when applied to interlaminar loading.

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