Slip-dependent friction in dynamic electroviscoelasticity

Dynamic Contact Problems with Slip-dependent Friction in Viscoelasticity

The dynamic evolution with frictional contact of a viscoelastic body is considered. The assumptions on the functions used in modelling the contact are broad enough to include both the normal compliance and the Tresca models. The friction law uses a friction coefficient which is a non-monotone function of the slip. The existence and uniqueness of the solution are proved in the general three-dime...

Dynamic Contact with Signorini’s Condition and Slip Rate Dependent Friction

Existence of a weak solution for the problem of dynamic frictional contact between a viscoelastic body and a rigid foundation is established. Contact is modelled with the Signorini condition. Friction is described by a slip rate dependent friction coefficient and a nonlocal and regularized contact stress. The existence in the case of a friction coefficient that is a graph, which describes the j...

Dynamic scaling in stick-slip friction

Stabilizing stick-slip friction.

Even the most regular stick-slip frictional sliding is always stochastic, with irregularity in both the intervals between slip events and the sizes of the associated stress drops. Applying small-amplitude oscillations to the shear force, we show, experimentally and theoretically, that the stick-slip periods synchronize. We further show that this phase locking is related to the inhibition of slo...

Static Friction, Healing, and Constitutive Laws for Time- and Slip-dependent Friction

I summarize laboratory friction experiments on quartz powder sheared at room temperature and humidity. Slide-hold-slide experiments indicate that static friction and related parameters vary systematically with both hold time and loading velocity. The data indicate that healing is closely related to gouge porosity and that static friction and healing are not simple friction parameters, but rathe...