滑动摩擦中不同润滑条件对应力层的影响研究
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摘要
真实工程表面接触时,微凸体将产生弹塑性变形。建立了在不同润滑条件下二维双粗糙弹塑性分形模型,分析了润滑对滑动摩擦中应力层的分布影响情况。在完全润滑和边界润滑时材料表层下方出现易断裂的循环应力区域,干摩擦时循环应力层消失。
The asperities are prone to elastic-plastic deformation in contacting between the engineering surfaces. In this arti-cle,the 2D double rough elastic-plastic fractal model under different lubrication conditions is established,and the influence oflubrication on the distribution of stress layer in sliding friction is then analyzed. There is the cyclic stress zone which is proneto broken within the surface of material under the condition of complete lubrication and boundary lubrication,and the stresslayer disappears when the dry friction occurs.
The asperities are prone to elastic-plastic deformation in contacting between the engineering surfaces. In this arti-cle,the 2D double rough elastic-plastic fractal model under different lubrication conditions is established,and the influence oflubrication on the distribution of stress layer in sliding friction is then analyzed. There is the cyclic stress zone which is proneto broken within the surface of material under the condition of complete lubrication and boundary lubrication,and the stresslayer disappears when the dry friction occurs.
引文
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[2]J.A.Grennwood,J.B.P.Williamson.Contact of Nominally Flat Surfaces.Proc[J].R.Soc.Lond.A,1966,95(242):300-319.
[3]J.Yang,K.Komvopoulos.A Mechanics Approach to Static Friction of Elastic–Plastic Fractal Surfaces[J].Tribology,2005,127(2):315-324.
[4]Robert L.Jackson,Jeffrey L.Streator.A multi-scale model for contactbetween rough surfaces[J].Wear,2006,261(2006):1337–1347.
[5]高秀坤,李兴照.滑动摩擦系数的离散元数值模拟与分析[J].石家庄铁道大学学报(自然科学版),2010,3(3):44-47.
[6]A Majumdar,B Bhushan.Role of Fractal Geometry in Roughness Characterization and Contact Mechanics of Surface[J].ASME Journal of Tribology,1990,112(2):205-216.
[7]B.B.Mandelbrot.How long is the cost of Britain?Statistical SelfSimilarity and Fractional Dimension[J].Science.1967:156:636-638.
[8]葛世荣,朱华.摩擦学的分形[M].第1版.北京:机械工业出版社,2005.
[9]Bowden F.P,Tabor D.The Friction and Lubrication of Solids.Part I[M].Oxford University Press,1950.
[10]Mulvihill D.M,Kartal M.E,Nowell D,Hills D.A.An elastic plastic asperity interaction model for sliding friction[J].Tribology International,2011,44(12):1679-1694.
[11]邵荷生,曲敬信,许小椂,等.摩擦磨损[M].北京:煤炭工业出版社,1992.