An equivalent temperature model of 3-D steady heat conduction analysis for a fiber metal laminated plate coated with a thermal barrier

Abstract

In this paper, an equivalent temperature model of three-dimensional steady heat conduction analysis for a fiber metal laminated plate coated with a thermal barrier (CFML) is presented. The separate variable method (SVM) and equivalent temperature (ET) method are applied comprehensively to solve the temperature field at the interface between the thermal barrier and top aluminum 2024-T3 layer for the fiber metal laminated (FML) structure firstly, and values of other layers' temperature and thermal contact resistance are obtained based on balance principle of heat flux between respective adjacent top and bottom layers subsequently. The aim of this research is to understand the influences of kinds of fiber species, numbers of FML layers, thickness ratio between total CFML structure and thermal barrier as well as temperature distributed function on the values of thermal contact resistance between respective adjacent layers and temperature distribution from top to bottom surfaces for the CFML structure. Especially, the ratio of thermal contact resistance between maximum and minimum values are about 5 times no matter considering one or two kinds of fiber species. Besides the present results (mainly geometrical and physical parameters' effect) could guide engineers designing the CFML structures to adapt to high-temperature environment especially aerospace temperature environment.