An FFT-based transient flash temperature model for general three-dimensional rough surface contacts
An FFT-based transient flash temperature model for general three-dimensional rough surface contacts
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DOI：
10.1115/1.555395
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发表时间：
2000-07
影响因子：
2.5
通讯作者：
Jian-Li Gao;Si C. Lee;X. Ai;H. Nixon
中科院分区：
文献类型：
--
作者：
Jian-Li Gao;Si C. Lee;X. Ai;H. Nixon
建立了基于快速傅里叶变换的瞬态闪温模型。得到了热配分函数的解析表达式。总之，这些大大提高了闪蒸温度计算的速度。研究了表面形貌对闪光温度的影响。根据模拟结果，与横向粗糙度的表面相比，具有纵向粗糙度的表面产生了明显更高的闪光温度。模拟结果还表明，在微凸体之间存在着明显的交叉加热现象，尽管接触压力有非常尖锐的峰值，但温度曲线却呈现出令人惊讶的平缓。S0742-4787~00！04002-9#
A transient flash temperature model was developed based on 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#