ИСТИНА

Sliding contact of a smooth indenter and a two-layered half-space is considered taking into account rheological properties of materials. Tangential stresses at the surface due to friction are also taken into account in problem formulation. The case of a viscoelastic layer bonded with a rigid half-space is analyzed as well as an opposite one, which is viscoelastic half-space covered by rigid layer. The problem is formulated as quasi-static. Numerical-analytical method of solution is based on boundary element method and iteration procedure. The solution, which is similar for both cases, is developed based on double integral Fourier transforms. New analytical solution is used to calculate influence coefficients for the computation procedure. Contact pressure, energy dissipation and internal stresses are analyzed in dependence on friction coefficient, sliding velocity, layer thickness and Poisson's ratio. The analysis of stresses inside the layer or in the viscoelastic substrate can be used to predict the coating fracture in friction interaction.