The Effects of Nanoscale Texture Surface's Parameters on Sliding Friction Process
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摘要: 采用分子动力学方法研究了半球形刚性压头在单晶铜纹理表面上的纳观黏着滑动摩擦过程。对不同纹理密度下纹理形状和纹理深度对黏滑摩擦性能的影响进行了全面研究,通过对比分析不同纹理参数下的滑动摩擦力和基体变形,揭示了上述参数对纹理表面黏滑摩擦的影响规律。模拟结果表明:在相同的纹理密度下,柱状纹理表面的滑动摩擦力小于矩形纹理表面。相比矩形纹理,柱状纹理表面的结构稳定性较差,但纹理表面的结构稳定性随着纹理密度的增加而加强。在相同的纹理密度下,矩形纹理表面的滑动摩擦力随着纹理深度的增加而减小。Abstract: The nanoscale stick-slip friction process of a rigid hemispherical tip on a single crystal copper texturesurface was investigated by using molecular dynamics simulation. The effects of texture shape and texture depth onthe characteristics of stick-slip friction under different texture densities were studied. The comparative analysis ofsliding friction force and substrate's deformation with different texture parameters reveals the effects of these param-eters on the stick-slip friction process. The simulation results show that the sliding friction force on the square pillartexture surface is less than that on the groove texture surface with the same texture density; compared with thegroove texture surface,the square pillar texture surface's structural stability is poor,but the latter's structural sta-bility is strengthened while its texture density increases; when the surface texture density is constant,the slidingfriction force on the groove texture surface decreases with the increasing of the texture depth.
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Key words:
- molecular dynamics /
- texture surface /
- texture shape /
- texture depth /
- stick-slip friction
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