An FFT-based transient flash temperature model for general three-dimensional rough surface contacts

A transient flash temperature model was developed based an a Fast Fourier Transform method. An analytical expression for the heat partition function was obtained. Together; these substantially increase the speed of flash temperature calculations. The effect of surface topography on the flash temperature was examined. According to the simulation results, the surface with a longitudinal roughness produced a noticeably higher flash temperature than the surface with a transverse roughness. The simulation results also indicate that there is a significant cross-heating activity between the asperities; the temperature profiles appeared surprisingly gradual although their contact pressures had extremely sharp peaks. [S0742-4787(00)04002-9].