A METHOD OF EVALUATION OF ELASTIC HYSTERESIS LOSSES IN ROLLING CONTACT

Luminita IRIMESCU¹

lumi@fim.usv.ro

Emanuel DIACONESCU¹

emdi@fim.usv.ro

Yves BERTHIER²

Yves.Berthier@insa-lyon.fr

Ilie MUSCA¹

iliem@fim.usv.ro

¹ Department of Mechnical Enfineering, University of Suceava, Romania

² INSA de Lyon, France

Abstract. This paper advances a new method of hysteresis loss evaluation in normally loaded rolling contacts by using collision experiments. In a rolling contact, a typical element passes through a cycle of reversed shear similar to the two phases of compression and rebound existing in a collision. This analogy leads to the idea of studying hysteresis loss in rolling through energy loss in collision experiments. The energy dissipated by elastic hysteresis in a sphere-sphere collision is measured, finding a linear dependence on contact pressure. By extrapolation of experimental results, ie assuming a linear dependence of hysteresis losses on stressed volume, a relation between the energy loss in rolling and that in collision is found.

Keywords: elastic hysteresis, collision, rolling friction