The effect of contact conditions and material properties on elastic-plastic spherical contact

Abstract

The elastic-plastic contact between a sphere and rigid flat is analyzed under perfect slip and full stick conditions for a wide range of the sphere mechanical properties. The analysis provides comparison of the contact load, contact area and distribution of the contact pressure for these two contact conditions. It is found that the contact conditions and mechanical properties have little effect on the global contact parameters. However, the evolution of the plastic zone with increasing interference is substantially different for contacts under perfect slip or full stick conditions.

An analysis of three-dimensional elasto-plastic sinusoidal contact

“…To enhance convergence, as outlined by Brizmer et al [21], the material of the sinusoidal surface was assumed elasto-plastic bi-linear isotropic hardening with a yield stress, S y , of 1 GPa and a tangent modulus, E T , 2% of the Young's modulus E. This isotropic hardening significantly improves the convergence without causing a significant change in the results.…”

A comparison of stick and slip contact conditions for a coated sphere compressed by a rigid flat

“…As was stated in Ref. [23], 2% isotropic hardening is the upper limit of many practical materials; it improves convergence, compared to an elastic perfectly plastic material model, with a small effect on the results (of less than 2.5%).…”

“…At higher values of Poisson's ratio, the tangential stresses under the stick contact condition are lower and the critical values for stick and for slip become comparable. Brizmer et al [23] extended the study in Ref. [22] into the elastic-plastic regime.…”

“…The results, presented in Refs. [19,23], were experimentally verified by Overcharenko et al [24]. Goltsberg et al [25] investigated the plastic yield inception of a coated sphere pressed by a rigid flat under the slip contact condition.…”

Effect of Strain Hardening on Elastic-Plastic Contact of a Deformable Sphere against a Rigid Flat under Full Stick Contact Condition

“…Brizmer et al [31] first analyzed the effect of full stick condition on the elasticity terminus of a spherical contact using finite element software ANSYS. Brizmer et al [32] extended their study for the loading of an elastic plastic spherical contact both under full stick and perfect slip contact conditions. They found that the interfacial parameters are insensitive to the contact condition and material properties of the deformable sphere.…”