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首页> 外文会议>Leeds-Lyon Symposium on Tribology; 20000905-08; Lyon(FR) >Elastic waves induced by the frictional sliding of two elastic half-spaces
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Elastic waves induced by the frictional sliding of two elastic half-spaces

机译：由两个弹性半空间的摩擦滑动引起的弹性波

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摘要

The nominally steady state frictional sliding of two flat elastic half-spaces is investigated. It is shown that steady sliding is compatible with the formation of a pair of body waves (dilatational and shear) in each body radiated away from the sliding interface. Each wave propagates at a different angle such that the trace velocities along the interface are equal. The angles of propagation are determined by the material properties and by the coefficient of sliding friction. The wave amplitudes are subject only to the restriction that the perturbations in interface contact pressure and relative tangential velocity satisfy the inequality constraints for unilateral sliding contact. Furthermore these waves, which can be generated during frictional sliding and contribute to formation of friction induced vibrations, are shown to exist for a variety of frictional sliding laws, including speed-dependent and speed-independent friction. It is also shown that a slip-pulse can exist which allows the two bodies to undergo relative tangential motion with a ratio of applied shear to normal stress which is less than the friction coefficient. This phenomenon can result in a kinetic friction coefficient which decreases with increasing sliding velocity.
机译：研究了两个扁平弹性半空间的名义稳态摩擦滑动。结果表明，稳定的滑动与在每个远离滑动界面的辐射体中形成的一对体波（扩张和剪切）兼容。每个波以不同的角度传播，使得沿着界面的走线速度相等。传播角度取决于材料特性和滑动摩擦系数。波幅仅受到以下限制：界面接触压力和相对切向速度的扰动满足单侧滑动接触的不等式约束。此外，这些波可在摩擦滑动过程中产生并有助于形成摩擦感应的振动，对于各种摩擦滑动定律，包括速度相关和速度无关的摩擦，它们都存在。还显示出可以存在滑动脉冲，该滑动脉冲允许两个主体经历相对切向运动，并且所施加的剪切力与法向应力之比小于摩擦系数。这种现象会导致动摩擦系数随滑动速度的增加而减小。

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