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首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference; 20071022-24; San Diego,CA(US) >PREDICTION OF DISSIPATION IN JOINTS SUBJECT TO OSCILLATING FORCE
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PREDICTION OF DISSIPATION IN JOINTS SUBJECT TO OSCILLATING FORCE

机译：预测关节应力中的耗散

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摘要

Energy dissipation in mechanical joints occurs as a result of micro-slip motion between contacting rough surfaces. An account of this phenomenon is especially challenging due to the vast differences in the length and time scales between the macro-mechanical structure and the micron-scale events at the joint interface. This paper considers the contact between two nominally flat surfaces containing micron-scale roughness. The rough surface interaction is viewed as a multi-sphere elastic interaction subject to a periodic tangential force. It combines the Mindlin's formulation for the elastic interaction of two spheres with the Greenwood and Williamson's statistical approach for the contact of two nominally flat rough surfaces so as to develop a model for multi-sphere problem in which sphere radii, contact load and the number of spheres in contact can only be known in a statistical sense and not deterministically.
机译：机械关节中的能量耗散是由于接触粗糙表面之间的微滑动而产生的。由于宏观力学结构与关节界面处的微米级事件之间的长度和时间尺度差异巨大，因此解决这一现象特别具有挑战性。本文考虑了两个包含微米级粗糙度的名义上平坦表面之间的接触。粗糙表面相互作用被视为经受周期性切向力的多球弹性相互作用。它结合了用于两个球的弹性相互作用的Mindlin公式，以及用于两个名义上平坦的粗糙表面接触的Greenwood和Williamson的统计方法，从而建立了一个多球问题的模型，在该模型中，球体半径，接触载荷和载荷数接触的球只能从统计意义上而不是确定地知道。

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