Abstract Thermal contact conductance (TCC) plays a vital role during any thermo-mechanical based analysis of the contacting surfaces. Inherently, it depends upon the actual contact-area at the interfaces, which is quite complex to estimate. This work aims to perform the micro-contact based structural, and thermal analysis of stochastically re-created rough surfaces, while using actual surface profile measurement, and proposes an experimentally validated FEM based approach for real contact area and TCC estimation. Different surface topography parameters estimation methods are compared, and a semi-deterministic based approach is evolved for the construction of surface topographies from actual roughness measurements. The asperities interactions and large deformation effects are incorporated during analysis. Close agreement between numerical and experimental TCC values shows the efficacy of the present approach.

中文翻译：

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基于实际表面粗糙度测量的接触面积和热导估计

摘要 热接触电导 (TCC) 在接触表面的任何基于热机械的分析中都起着至关重要的作用。本质上，它取决于界面处的实际接触面积，这是非常复杂的估计。这项工作旨在对随机重建的粗糙表面进行基于微接触的结构和热分析，同时使用实际的表面轮廓测量，并提出一种经过实验验证的基于 FEM 的真实接触面积和 TCC 估计方法。比较了不同的表面形貌参数估计方法，并发展了一种基于半确定性的方法，用于根据实际粗糙度测量值构建表面形貌。在分析过程中会结合凹凸相互作用和大变形效应。