Strength of Mechanically Fastened Joints in 'Kevlar' Reinforced Composite Materials

摘要

In this investigation the structural use of 'Kevlar' fibre reinforced plastic is examined by an experimental analysis of mechanical joints in various types of laminates. The material used was woven fabric in 913 resin. Static tests on riveted joints (solid and hollow rivets) as well as pinned and bolted joints were carried out. Riveted joints in CFRP were also tested for the sake of comparison. Variables such as geometric factors, bolt clamping pressure, ply orientation and effect of clamping load on riveted joints with solid rivets were investigated. The compressive properties of 'Kevlar' in combination with the characteristics of woven fabrics, caused unexpected behaviour. In comparison with the CFRP laminates, the KFRP specimens exhibited 'metal-like' features at failure. The strength depended on lay-up and through-thickness clamping caused a change in failure mode.