Abstract
Sliding contact of a smooth indenter and a two-layered half-space is considered taking into account rheological properties of materials. 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. 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 sliding velocity, layer thickness and Poisson's ratio.
Highlights
Rubbers and other polymers are often used as coatings to provide damping, anti-noise and other effects during friction
The method described above, was used to consider a sliding contact of a spherical indenter and a layered half-space with the viscoelastic material used as a layer or as a substrate
The following dimensionless parameters were used for analysis: dimensionless coordinates (x∗, y∗) = (x, y)/R, velocity V∗ = Vω/R = V′ω · a/R, layer thickness h∗ = h/R, load Q′ = Q/R2Gl and contact pressure p∗(x, y) = p(x, y)/Gl
Summary
Rubbers and other polymers are often used as coatings to provide damping, anti-noise and other effects during friction. Contact pressure distributions are used to calculate internal stresses in the viscoelastic layer or substrate. Expressions for such calculations were obtained for elastic layered half-space by (Nikishin and Shapiro, 1970): FIGURE 4 | Contact pressure distribution within central section of indenter and plane Oy. h∗ = 0.03, 0.1, ∞(curves 1-3 respectively), c = 5, ν = 0.3, Q∗ = 0.1, V∗ = 0.05.
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