Abstract
Friction and wear properties between unidirectionally oriented fibre-reinforced plastics and carbon steel have been investigated. A wide variety of fibre-reinforced plastics were prepared for experiments; the fibre-reinforcements used were high-tensile-strength carbon fibre, high-modulus carbon fibre, E-glass fibre, stainless steel fibre and aramid fibre (Kevlar-49), while epoxy resin, polyester resin and PTFE were employed as matrix material. The law of mixtures in the calculation of the friction coefficient of composite materials is deduced, and the validity of this law is discussed by a comparison of computed values with experimental data. The wear performances of seven different kinds of fibre-reinforced plastics are summarised. Surfaces of composite materials after wear are studied using scanning electron microscopy, and a model is proposed stating that the wear of composite materials proceeds by wear-thinning of the fibre-reinforcements, subsequent breakdown of the fibres and by peeling-off of the fibres from the matrix. The equation of wear of composite materials is also proposed stating that the Young's modulus and interlaminar shear strength of fibre-reinforced plastics are the influential factors on their specific wear rates.
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