| 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 et.al.).
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).
|