A Review on Wear Prediction Models of Polymers

Abstract: Now a days metallic material is replaced by polymer or its composites due to high strength to weight ratio, self-lubricating, elasticity, low friction and high wear resistance. Wear behaviour for polymer composites is more complicated than metallic materials due to operating conditions and mechanical properties of polymers and fillers used. Polymers have ability to form a thin film against the metallic counterpart which changes the wear behaviour of polymers. In this paper an attempt is made to discuss the various wear models used by researchers focusing on different operating parameters like normal load, sliding velocity, time, counterpart roughness, temperature. Mathematical model or empirical equations have been developed corelating these properties to predict the wear of materials on the basis of mechanism of types of wear. Initially only operating conditions and hardness were considered and assumed that operating conditions are linear. Later on, various mathematical models were studied and it was observed that in most of the models the operating parameters are non-linear such as load, sliding speed, counterface roughness, time. The major influencing parameters for the wear behaviour of polymer composites are load, temperature, speed, elastic modulus, hardness and toughness where as it was also observed that some parameters affect the wear but are less significant.