Abstract
Forming process with pre-stacked and uncured thermoset fibre metal laminate offers improved deformability compared to full-cured laminate especially for the production of complex structural components. This work investigated the friction behaviour at the metal-prepreg interface of glass fibre reinforced aluminium laminate through an inter-ply friction test. The influence of sliding velocity, normal force, fibre orientation and resin viscosity coupled with temperature on static and kinetic friction coefficients were studied. The kinetic friction behavior in the transition region between mixed and hydrodynamic lubrication, showed a good agreement with the Stribeck-curve theory. While for the static friction, a modified Coulomb friction model was found to fit the experimental results. These models were translated into a phenomenological inter-ply friction model which was incorporated into Abaqus/Explicit as a user-defined friction subroutine for verification. The findings contribute to the development of the forming process with fibre metal laminates.
Highlights
Fibre metal laminates are the type of lightweight composite mate rials made by alternating layers of fibre reinforced polymers and thin metal sheets
This work investigated the friction behaviour at the metal-prepreg interface of glass fibre reinforced aluminium laminate through an inter-ply friction test
For thermoset based fibre metal laminate like glass fibre reinforced aluminium laminate (GLARE), the matrix obtains its properties through a cross-linking process, referred to as curing
Summary
Fibre metal laminates are the type of lightweight composite mate rials made by alternating layers of fibre reinforced polymers and thin metal sheets. For thermoset based fibre metal laminate like glass fibre reinforced aluminium laminate (GLARE), the matrix obtains its properties through a cross-linking process, referred to as curing This cross-linking mechanism is irreversible and usually performed in autoclaves to apply the required temperatures and pressures [3]. Preforming an initial flat blank requires the laminate that deforms following the desired shape in a predictable and repeatable way without the occurrence of fracture, wrinkles and other possible defects [6,7] This method is achieved by allowing the individual layers to deform by the intra-ply shear within the prepreg and inter-ply sliding in-between the metal sheets and pre preg layers
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