Study On The Wear Behaviour And The Wear-Resisting Design Criterion Of The C/Cu Composite Material

Carbon fiber copper matrix composite material (which is also called C/Cu composite material) is a kind of new material that can be used in a pair of unlubricated friction .So it is necessary to study both the wear and friction behaviours, and the wear-resisting design criterion of the material. The experiments are conducted under unlubricating condition on the block-on-ring wear test machine of model MG-200, and the test blocks are the C/Cu composite material but the material of the test ring is steel 45. The contents of the research are following :1. The experimental design for wearSeveral kinds of experimental design (factorial experiment design, orthogonal regression design, and so on) are reviewed, and the design by uniform distribution is found which is specially fitted for wear experiments. Compared with the traditional experimental designs in which the experimental results cannot mirror the full features of the wear this design procedure can cover a large enough factor space and all of the experimental parameters that go together in the space may reflect features of wear process of materials. It can be adapted to even more factor levels, reduce further times of wear experiment, and make the statistical result of the experimental data fine. The design by uniform distribution will provide scientific basis for the standardization of the wear experiments2. Wear probable prediction techniqueIn the research work, the wear rate is considered as a random variable, and the experimental design technique and the probability theory are employed to analyze the experimental results. After the experimental data with certain reliability are obtained and the wear-distribution parameters of the C/Cu composite material are determined the prediction equation is developed in which the wear rate is a function of the load (p), the sliding speed (v) and the reliability (R). The statistical test indicates that the equation has a high significance level. Thus the wear probable prediction of the C/Cu composite material is possible through the equation.The method is applied to the C/Cu composite material, and has wider...