Thermal contact conductance: effect of overloading and load cycling

Thermal contact conductance and its dependence on load cycling

“…Increments in TCC of up to 16% were observed in the first five load cycles and a further 2% up to the 30 th cycle. A similar study was conducted by Wahid and Madhusudana [15] and a similar conclusion was made. They reported an increment of 10% in TCC values for the first 25 cycles.…”

“…Both of these studies argue that the operational effect on TCC is important for at least the first 20 cycles. The load cycle effect was explained in terms of a different deformation mode operating for the contacting asperities during different cycles [14,15]. The current study presents data that contradict these earlier findings.…”

“…This shows that there is no measurable increase in TCC after the first unloading in disagreement with two previous studies [14,15]. Any increase in TCC observed by increasing the load cycle is within the errors of the experiment.…”

“…This work will also investigate the hysteresis effect that has been seen in previous work. The effect of load cycling on TCC has been attributed to the variation of deformation mode during loading history [14,15]. It has already been suggested that such a claim is difficult to substantiate.…”

“…The third group of lapped washers were grit blasted to get a rougher conforming surface. The various studies conducted on different interface geometries were to examine whether surface topography has an influence on the change of TCC with load cycling as reported in two previous studies [14,15].…”