Mode I Interlaminar Fracture Toughness Characterisation of Carbon Fibre Reinforced Thermoplastic Composites

摘要

Delamination has always been regarded as one of the most critical failures inlaminated composites. The growing interest in a more rapid, out-of-autoclave (OOA)manufacturing techniques for automotive applications such as compression mouldingand thermoforming has prompted the engineering community to further investigate andunderstand the delamination resistance of carbon fibre reinforced thermoplastic(CFRTP) composites over the more conventional carbon fibre reinforced thermosetting(CFRTS) counterparts.In this study, the mode I (opening) interlaminar fracture toughness of two non-crimpfabric (NCF) biaxial (0/90º) carbon/thermoplastic composite systems with fibre volumefraction (FVF) of 50%; T700/polyamide 6.6 and T700/polyphenylene sulphide havebeen characterised. The mode I delamination resistance, onfl for both materials wasdetermined using the double cantilever beam (DCB) specimen. Following theexperimental results and data reduction, the Mode I interlaminar fracture toughnesswere compared. Fractographic analysis was conducted using a scanning electronmicroscope (SEM) to characterise the microstructure of the failed specimens.