Abstract
The heat transfers are investigated between a phenolic pin sliding against a steel disc. Inverse heat conduction methods are used to identify the temperature fields and the heat fluxes at the contact surface for each part. Experimentals tests are performed on the High Speed Tribometer designed to reproduce mechanical and thermal conditions met in forming and braking applications at reduced scale. It allows to measure temperatures inside rotating part in seven locations with K-type thermocouples sensors connected to a telemetry system. Their positions have been chosen regarding a sensibility analysis performed in expected thermal conditions. The heat distribution on the disc surface, the heat repartition parameter α between the pin and the disc and the sliding thermal conductance hc are discussed regarding the friction conditions during the tribological tests performed. In this tribological system, the temperature and the pressure influences on hc are highlighted. The originality of this work is the possibility to calculate two dimensional transient heat fluxes for sliding speed until 15m.s-1 thanks to several thermocouple measurements.
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