Tribological Modeling
Abstract
Analytical modeling of tribological behavior of interacting bodies is undertaken in three parts: modeling stresses at the surface and in the coatings of a coated solid, friction or traction at the interface between two contacting solids, and modeling of wear under given conditions of operation. Stress modeling of coated solids is accomplished by plane strain numerical solutions for line contact problems and finite element solutions of the more complex elliptical contacts. Both mechanical and thermal stresses in the solid are modeled. Semi-empirical relations are derived by regression analysis of experimental traction-slip data for several solid lubricants. The traction equations are readily applicable for the design and performance simulation of mechanical components. Wear is modeled as a multi-process phenomena. A generalized wear equation is developed such that one of the terms consists of Archard-type sliding wear while others represent thermally activated phenomena with varying activation energies. The model thus provides wear prediction as a function of load, speed and temperature. Similar to the traction model, coefficients of the wear equations are derived by fitting the model to experimental data. Good correlations of the model are demonstrated with two sets of experimental wear data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1998
- Accession Number
- ADA372092
Entities
People
- Pradeep K. Gupta