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首页> 外文会议>World Tribology Congress III vol.1; 20050912-16; Washington,DC(US) >ON THE FRICTIONAL BEHAVIOR OF AN INCIPIENT-SLIDING CONTACT OF SPHERE-ON-FLAT WITH HIGH NORMAL LOADS
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ON THE FRICTIONAL BEHAVIOR OF AN INCIPIENT-SLIDING CONTACT OF SPHERE-ON-FLAT WITH HIGH NORMAL LOADS

机译：正常载荷作用下扁球缓滑接触的摩擦行为研究

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摘要

Levinson et al [1] present experimental results that show a steep reduction in the static coefficient of friction of a dry sphere-on-flat contact as the normal load increases. The experiments cover a range of loading conditions from elastic contact to contact with significant plastic deformation. A theoretical analysis is carried out in this study using a contact model of an elastic-plastic sphere on a rigid flat. The shear strength of the contact interface is assumed to be proportional to the contact pressure until it reaches a limiting value that is below the bulk shear strength of the sphere. The theory predicts a friction behavior that is consistent with that from the experimental results in [1] in all key aspects. The analysis reveals that a relatively low limiting shear strength in the contact interface is likely the key factor leading to the dramatic reduction in the friction coefficient and the negligible junction growth obtained in the experiments.
机译：Levinson等人[1]给出的实验结果表明，随着法向载荷的增加，干球对平面接触的静摩擦系数急剧降低。实验涵盖了从弹性接触到明显塑性变形接触的一系列载荷条件。在这项研究中，使用在刚性平面上的弹塑性球的接触模型进行了理论分析。假定接触界面的抗剪强度与接触压力成正比，直到达到低于球体整体抗剪强度的极限值为止。该理论预测的摩擦行为在所有关键方面均与[1]中的实验结果一致。分析表明，接触界面中相对较低的极限剪切强度可能是导致摩擦系数显着降低和实验中获得的可忽略的结生长的关键因素。

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