**JOT Abstract**

### An Intersonic Slip Pulse at a Frictional Interface
Between Dissimilar Materials** **

G.G. Adams

Summary

Two homogeneous and isotropic elastic half-spaces are acted upon by
remote normal and shear tractions. The applied shear stress is less
than that which is required to produce overall sliding of the two
bodies. The possible existence of a slip pulse is investigated,
i.e. a finite-width region, on the interface, of altered normal and
shear stress which satisfies the Amontons-Coulomb law of friction.
Pulses which travel at a speed which is greater than the minimum shear
wave speed and less than the maximum dilatational wave of the two bodies,
are of interest
in this investigation. Such pulses are shown to exist for sufficient
friction and for modest mismatches in material combinations. The pulse
is weakly singular at the leading edge and bounded at the trailing
edge. Furthermore it travels at speeds just below the lesser
dilatational wave speed and in the opposite direction of sliding of the
lower wave-speed material. In addition, a pair of equations are given which
relate the interfacial normal and shear stress to the interfacial slip
velocity. These relations are analogous to the subsonic results of
Weertman, but are valid for an arbitrary speed range.

### Related Publications

### Journal Publications