On a Simplified Model for Numerical Simulation of Wear During Dry Rolling Contacts

Abstract

We deal with rolling contact between quasi-identical bodies. As normal and tangential problems are uncoupled in that case, the simplified approach to determine contact area and normal loading distribution for rolling contact problems is presented in Sec. 2. In Sec. 3, the solution of the tangential problem is used to update the rolling profiles and enables to follow the wear evolution versus time. The method used to solve the normal problem is called semi-Hertzian approach with diffusion. It allows fast determination of the contact area for non-Hertzian cases. The method is based on the geometrical indentation of bodies in contact: The contact area is found with correct dimensions but affected by some irregularities coming from the curvature’s discontinuity that may arise during a wear process. Diffusion between independent stripes smoothes the contact area and the pressure distribution. The tangential problem is also solved on each stripe of the contact area using an extension of the simplified approach developed by Kalker and called FASTSIM. At the end, this approach gives the dissipated power distribution in the contact during rolling and this power is related to wear by Archard’s law. This enables the profiles of the bodies to be updated and the evolution of the geometry to be followed.

Abrasive Wear Resistance of Plasma-Nitrided Ti Enhanced by Ultrasonic Surface Rolling Processing Pre-Treatment

“…Additionally, USRP pre-treatment resulted in a dimpled surface with a greater number of micropores on the surface of the plasma nitriding (Figure 3 and Figure 4). The dimpled surface could keep some wear debris on the worn surface (Figure 12), and finally, the rolling and polishing of abrasive SLRPs resulted in a low friction coefficient (Figure 7) [5,28,30]. Consequently, the S&N850 Ti showed the best friction reduction and anti-wear performance among the Ti treated by USRP pre-treatment and plasma nitriding when sliding with abrasive SLRPs.…”

Reliability estimation from test data using two different approaches

“…It is therefore important to take the mechanical quantities at interface: contact pressure, tangential stress due to friction between two solids, the material parameters, etc ... We place ourselves in case where the steel materials in contact have elastic deformation and wear which is generated by removal of material. We do not present modeling in this article that is widely described in the work of [4], [8], [10][11] that use [12][13][14].…”

Stochastic simulation of top load test on poly(ethylene terephthalate) bottles: An experimental study on dispersion of elastic properties

“…Using virtual field method both on bottle under pressure and on cut specimen with a central hole, 18 one can provide accurate information on Young modulus E z and E θ , Poisson's ratio, and shear modulus. Bottles have been produced using the same set-up and optimized process parameters, defined based on actual industrial conditions, concerning preform, mold, process temperatures, air pressure and stretching rod velocity.…”