TourTourContact temperature pin-on-disk


 Calculation of the contact temperature as a result of frictional heating.
 F N r 10-3 m K1 W/mK
 V m/s L 10-3 m K2 W/mK
  HB GPa k2 10-6 m2
  (default value of ball bearing steel)
dTbulk C
 Ar /An r 10-6 m dTflash C
 Temperature increase dT C
1Ashby, M.F., Abulawi, J., Kong, H.S., 1991, "Temperature maps for Frictional Heating in Dry sliding", Tribology Transactions, Vol.34, Number 4, October 1991, pp577-587.

The flash temperature in the asperity summits is found by entering a representative value for the contact radius of the junctions, i.e. rj=0.1e6/H  (Ashby

At a depth of 0.5 times the asperity radius the flash temperature is for 90% leveled out and reaches the interfacial bulk temperature.

With increasing contact pressure, Ar grows until it equals An, and the distinction between dTbulk and dTflash disappears. To achieve this dT=dTflits+(1-Ar/An)dTbulk, where Ar is the real contact area under tractive load (Johnson, 1968).