SEDL / STP / STP1105-EB / STP17665S

Wear Modeling : How Far Can We Get with First Principles ?

Godet, M
Professor of Mechanics and directs, Laboratoire de Mécanique des Contacts (CNRS URA 856) Institut National des Sciences Appliquées de Lyon, Villeurbanne,

Berthier, Y
Professor of Mechanics and directs, Laboratoire de Mécanique des Contacts (CNRS URA 856) Institut National des Sciences Appliquées de Lyon, Villeurbanne,

Lancaster, J
Professor of Mechanics and directs, Laboratoire de Mécanique des Contacts (CNRS URA 856) Institut National des Sciences Appliquées de Lyon, Villeurbanne,

Vincent, L
Professor of Mechanics and directs, Laboratoire de Mécanique des Contacts (CNRS URA 856) Institut National des Sciences Appliquées de Lyon, Villeurbanne,

Pages: 7    Published: Jan 1991

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Abstract

A brief description of what is meant by “wear modeling for design,” is given. The three contributors or triplet that must be considered in any wear modeling attempt are identified. These are : - mechanisms : i.e. all systems in which one or more contacts are established. Quasi-static liaisons such as gaskets, high speed bearings and gears are examples of mechanisms. - first-bodies : i.e. the rubbing elements of each mechanism; gear teeth, balls, races and cable strands, are examples of first-bodies. - third-bodies : i.e. any material, whether natural or artificial, which separates the rubbing first-bodies. Solid and liquid lubricants and debris beds are examples of third-bodies.

The diversity of conditions (loads, speeds, temperatures, environments) encountered in different mechanisms, the differences noted in stress and temperature fields found in first-bodies, the variations in composition and rheology observed in third-bodies are highlighted.