Theory of viscoelastic adhesion and friction

We present a novel theory of the adhesive contact linear viscoelastic materials against rigid substrates moving at constant velocity. Despite non-conservative behavior system, closure equation problem can be rigorously formulated in form local energy balance. In case adhesiveless contacts, this is equivalent to enforce stationarity total stored into material. However, presence interfacial adhesion, appearance terms leads different values release rates G1 and G2 trailing leading edges, respectively. Specifically, predicts non-monotonic trend as function indenter velocity, well very significant enhancement hysteretic friction due coupling between adhesion viscoelasticity, compared case. Both predictions are good agreement with existing experimental data.