Sliding Contact Stress Field Due to a Spherical Indenter on a Layered Elastic Half-Space

Abstract

The quasi-static sliding contact stress field due to a spherical indenter on an elastic half-space with a single layer is studied. The contact problem is solved using a least-squares iterative approach and the stress field in the layer and substrate is determined using the Papkovich-Neuber potentials. The resulting stresses are discussed for different values of the layer stiffness relative to the substrate and also for different values of the friction coefficient.

Determination of Adhesion Energy of CNxThin Film on Silicon from Micro-Scratch Testing

“…The interfacial shear stress becomes larger when the hardness of the film increases relative to the substrate. The results agree with the findings of O'Sullivan and King (19). In addition, the effect of Young's modulus of the film, E 1 , and substrate, E 2 , respectively, on L c has also been examined with our current method.…”

Tribology and Micromechanics of Chromium Nitride Based Multilayer Coatings on Soft and Hard Substrates

“…However, friction plays a decisive role, affecting the tangential forces and, thus, the shear stresses in the coating-substrate system [31]. In the theory of pure indentation or at zero friction (µ = 0), yielding in the coated surface always initiates at the coating/substrate interface below the center of the contact (highest von-Mises stresses), and the plastic zone does not grow towards the surface below the indenter [32,33]. Applying friction load (µ > 0), the point of first yield moves from the center position backwards or forwards, depending on the friction coefficient [33]: For µ = 0.25, the highest stressed region moves closer to the surface compared to the non-coated case, being ~40% higher as non-coated and ~50% as coated surface and µ = 0.…”

Finite-element analysis of layered rolling contacts

“…King [13] in 1987 analysed the normal contact of layered, isotropic solids, and dealt with the effective elastic modulus of a layered medium. In a highly cited paper, King and O'Sullivan [14] in 1987 extended the work of Chen and Engel [8] to twodimensional, sliding contacts and, in the following year (1988), to three-dimensional contacts [15].…”