Experimental characterisation and constitutive modelling of the intra-ply tensile and shear properties of unidirectional fibre reinforced thermoplastics (UD FRTPs) under solid-state stamp forming conditions

• DOI: 10.1016/j.compositesa.2024.108034
• Publication Date: 2024-01-18T09:40:13Z
• Authors: Hongyan Wang; Zerong Ding; Xingtong Chen; Haibao Liu; Nan Li

To enable the success of solid-state stamp forming unidirectional fibre reinforced thermoplastics (UD FRTPs), it is essential to accurately characterise and model material deformation under desired conditions. This paper comprehensively investigates intra-ply tensile shear properties carbon polyamide 6 CF/PA6), which a type commonly used UD FRTP. accomplish this, V-Notched Rail (VNR) tests are conducted for characterising transverse longitudinal properties, respectively. The temperature effects (180 – 220 ℃, at 0.01 /s 0.04 deformation) strain-rate (0.001 0.25 0.004 0.4 deformation, both 200 ℃) studied. It found that has significant on while marginal. also proposes new physically based constitutive considering all deformable constituents, i.e., polymer constituent by fibres (PrF) polymer-fibre interface (P-F). not only shows good prediction thermomechanical CF/PA6 deformations, but gives insights into mechanisms. successfully embedded Finite Element Analysis (FEA) software validated through accurate specimen bias-extension. methodologies developed here offer an effective tool predicting behaviours guiding process FRTPs.