Work

Manufacturing, interfacial adhesion and mechanical investigations of inverse hybrid composite laminates: Carbon fibre-reinforced Polyamide-6/Aluminium

Year: 2025

Type: article

Abstract: Inverse hybrid laminates consist of a metallic sheet sandwiched between two continuous fibre-reinforced thermoplastic composites. This class of structures can be tailored using specific sub-components combination to achieve a desired mechanical performance. The combination studied in the present work consist of an aluminium alloy sheet sandwiched between two carbon fibre-reinforced polyamide-6 thermoplastic composites. Inverse hybrid laminates are manufactured under a controlled cycle of time, temperature, and pressure. Among the challenges in manufacturing this kind of hybrid laminates is the metal/composite interfacial adhesion. Metal/composite delamination take place upon the cooling step of manufacturing process is finished. To prevent this phenomenon functionalized thermoplastic foil adhesion promoters are used in combination with a mechanical treatment of the aluminium alloy sheet surfaces. In this regard two commercial adhesion promoters are used, and their performances are compared through inverse hybrid laminates mechanical testing: monolayer adhesive foil based on functionalized polypropylene, and a second one based on functionalized polypropylene/polyamide. Three-point bending, tensile, and interlaminar shear strength tests are conducted to evaluate the mechanical performances and failure modes of the manufactured inverse hybrid laminates and compared to those of the carbon fibre-reinforced thermoplastic composite.

Source: Journal of Materials Research and Technology

DOI: 10.1016/j.jmrt.2025.08.242