二维粗糙面间滑动摩擦过程中平稳性研究
发布时间:2018-01-17 02:00
本文关键词:二维粗糙面间滑动摩擦过程中平稳性研究 出处:《机械设计与制造工程》2016年11期 论文类型:期刊论文
【摘要】:基于现有的分形模型,考虑到黏着现象的普遍性,通过在界面引入黏着剪切强度并考虑材料断裂,建立了考虑黏着、弹塑性变形影响的二维分形金属粗糙面间的滑动摩擦模型,并运用有限元软件进行数值求解。通过设置不同界面剪切强度及滑动速度参数,研究了两粗糙面间滑动过程中的平稳性。对建立的二维双粗糙弹塑性分形模型的实例进行分析,结果表明:当界面剪切强度较小时,法向速度波动幅值增大;当界面剪切强度增大到一定值后,法向速度波动幅值迅速的减小,使滑动较为平稳。滑动速度对平稳性的影响较大,滑动速度越大,滑动过程中振动越剧烈。
[Abstract]:Based on the existing fractal model, considering the universality of adhesion phenomenon, the adhesion is considered by introducing adhesive shear strength into the interface and considering the fracture of the material. The sliding friction model of two-dimensional fractal metal rough surface affected by elastic-plastic deformation is numerically solved by using finite element software. Different interface shear strength and sliding velocity parameters are set up. The stability of the sliding process between two rough surfaces is studied. An example of two-dimensional double rough elastoplastic fractal model is analyzed. The results show that the amplitude of normal velocity fluctuation increases when the shear strength of interface is small. When the shear strength of the interface increases to a certain value, the amplitude of the normal velocity fluctuation decreases rapidly, which makes the slip more stable. The greater the sliding velocity, the more violent the vibration in the sliding process.
【作者单位】: 四川文理学院智能制造学院;
【基金】:四川文理学院特色培育项目(2015TP005Y)
【分类号】:TH117.1
【正文快照】: 摩擦磨损产生的根本原因在于接触对受到接较准确地模拟真实粗糙表面[7]。在滑动过程中,触表面力的相互作用,产生一系列的变化,如黏着、摩擦磨损与力的变化都主要发生在摩擦副元件的形变、疲劳与犁沟等。这些相互作用的结果都与接表层,文中通过在界面引入黏着剪切强度,考虑材触,
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