| Summary: | 碩士 === 國立虎尾科技大學 === 機械與機電工程研究所 === 99 === Static micro-contact theory then has led to the development of the mechanical characteristics of further the understanding in the University. and also to solve parts of the surface and interface problems. but in static and dynamic are considerable micro-contact characteristics of the different. dynamic micro-contact understanding of micro-contact feature allows us to more accurately predict the interface properties.
This study used optical measurement to observe the hemispherical and semi-elliptical cooper metals with soft and tough properties, putting on hard and flat quartz glass. After applied normal per-load and tangential load, the cooper metals would slid on the platform, then explored the deformations of contact areas and geometric shapes after the asperity with various sizes and shapes applied various positive and sliding rate, and to realize the effects between adhesion, friction, and wear to the properties of two contact surface.
The results of experiment show that when the two contact objects start to slide, the interface growth, compression, and deformation are all nonlinear, these trends always generate at initial sliding stage; otherwise, the interface growth, compression, and deformation are all proportional to forward load and sliding speed, but inverse proportional to radius of curvature and ellipticity.Friction with the positive load the is proportional, but friction coefficient with the positive load the is inversely proportional, so positive load increase and friction changes is not as geometric. Regardless of the sliding speed changes, the static friction coefficient of maximum occurs the distance of 200μm to 300μm. Slip angle changes and the ellipticity change to regarding coefficient of friction and interface junction growth has not greatly affected.
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