Strain rate effects on the shear mechanical properties of a highly oriented thermoplastic composite material using a contacting displacement measurement methodology: Part A: elasticity and shear strength

摘要: This paper is concerned with the characterisation of shear mechanical properties glass-fibre-reinforced thermoplastic composite laminates over a range strain rates. The research was carried out as part DTI/EPSRC-funded CRACTAC programme, which FASMAT Foresight Vehicle suite projects. Twenty-two [±45]2s laid-up specimens each were tested at 5, 50 and 500 (mm/min) crosshead displacement rates, using universal testing machine. longitudinal transverse strains obtained experimentally contacting extensometry apparatus then transformed to ply axis Classical Laminate Theory. A rigourous statistical treatment method proposed for processing analysis raw data. modulus decreased increasing rate. failure stress increased Semi-empirical linear functions strength respect logarithm independent Finally, observed opposing trends in-plane suggested that damage evolution rate dependent examined material.