Load Introduction in Carbon Fibre Composites for Automotive Applications

摘要: The introduction of carbon-fibre reinforced plastics in load bearing automotive structures provides a great potential to reduce vehicle weight and fuel consumption. A reduction overall manufacturing cost can be realised through part integration use cost-effective materials such as heavy tow carbon fibre. There is current drive within the industry develop technologies necessary allow components mass production vehicles. One key technology development reliable joining techniques. This thesis addresses several important aspects plastics. in-plane out-of-plane loads composite laminates based on non-crimp fabrics has been investigated experimentally numerically. strength considering effects laminate stacking sequence, geometry lateral clamping bolt-hole clearance. failure mode ultimate were found significantly dependent upon geometry, load. influence initial clearance strength, at 4% hole deformation load, was determined experimentally. Significant for both pin-loaded clamped laminates. It concluded that effect significant with regard design mechanically fastened joints. three-dimensional non-linear finite element model developed investigate stress field adjacent hole. magnitude distribution level importance minimising machining high tolerance, defect free holes highlighted. concentrated commonly avoided due their poor interlaminar through-thickness strengths. However, these occur frequently thus knowledge behaviour subject transverse loading necessary. Transverse fibre plastic specimen size, thickness sequence. load-displacement essentially linear occurring 20-30% governing modes by fractographic analysis matrix intralaminar shear failure. method used successfully predict structural first-ply Load Introduction Carbon Fibre Composites Automotive Applications v