
180 Friction-Induced Vibration and Self-Organization
For the frictional sliding contact of two elastic bodies, there are four bound-
ary conditions (Nosonovsky and Adams 2002):
(6.215)
yy yy
(6.216)
xy xy
(6.217)
+τ =µ −τqxtp xt*(,0,) [* (,0, )]
xy yy
(6.218)
In Equation (6.218), μ is the interface coefcient of friction (i.e., the ratio of
shear to normal stress at the interface), as dened in Table6.1. Moreover, if
steady motion occurs, then the ratio q*/p* is dened as the apparent coef-
cient of friction (μ*). At this point of the analysis, Equation (6.218) requires μ*
and μ to be ...