Abstract
Single-curvature bending of fibre-reinforced thermoplastic (FRTP) composites has been demonstrated to be a useful method for determining the longitudinal shear behaviour of these materials. This paper further examines the vee-bending method as a means of analysing the transverse shear response of a glass fibre-reinforced polypropylene material. Laminated strips, with layers possessing reinforcing fibres aligned either parallel or perpendicular to the bend axis, are subjected to a novel bending operation between two highly polished platens, designed in such a way as to ensure a constant rate of shear deformation. Interpretation of the material's longitudinal and transverse behaviour is made by way of an idealised fibre-reinforced material (IFRM) model subject to the kinematic constraints of incompressibility and fibre inextensibility. The experiments demonstrate the suitability of the method for comparing the transverse and longitudinal shear behaviour of such materials.
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