The strength, hardness, wear resistance and other properties of the material surface
can be improved by using gradient nanostructured coating. Full stick contact which
prevents relative sliding between two contact surfaces can guarantee the stability and
safety of the mechanical system, reduce the wear and fatigue, and lower the energy
consumption. This paper focuses on the full stick contact problem for the gradient
nanostructured coated half space under a rigid spherical indenter by considering the
size effect. The contact problem for gradient nanostructured coating in which the
material parameters vary along the thickness direction bonded to the half space is
considered based on couple stress theory and a laminated model. The full stick
contact problem for gradient nanostructured coating is described by the
coupled singular integral equations with the help of the Hankel integral
transform technique and transfer matrix method. The influence of gradient
index of coating on the mechanical response in full stick contact problem by
considering the size effect are analyzed. The results provide an effective way for
designing the gradient nanostructured coating to minimize contact damage and
failure.
Keywords
size effect, full stick contact, gradient nanostructured
coating, singular integral equations
