基于多尺度模拟的橡胶/钢帘线复合材料辐射散热行为机制研究

Study on the mechanism of radiation heat dissipation behavior of rubber/steel cord composites based on multi-scale simulation

橡胶/钢帘线复合材料的传热与温度场分析对橡胶制品的硫化成型、热氧老化、热疲劳寿命研究具有重要意义。本文基于多尺度传热模型对不同钢帘线占比、排列角度和温升工况下的橡胶/钢帘线复合材料传热和散热机制进行研究,并通过实验验证。结果表明,橡胶/钢帘线复合材料呈现明显的各向异性传热行为,传热界面的热流聚集效应会加速热量的层间扩散,使温度分布更均匀。模拟计算得到的辐射散热发射率高达0.95,且随着钢帘线占比增大和温度升高,辐射散热行为越明显。对比串并联传热模型,多尺度传热模型预测误差从10.1%减小到2.5%。

Heat transfer and temperature field analysis of rubber steel/cord composites are important for the study of vulcanization molding,thermo-oxidative aging,and thermal fatigue life of rubber products.In this paper,the heat transfer and heat dissipation mechanisms of rubber/steel cord composites with different steel cord ratios,laminate angles and temperature rise operating conditions are investigated based on a multi-scale heat transfer model and experimentally verified.The results show that the rubber/steel cord composites exhibit obvious anisotropic heat transfer behavior,and the heat flow aggregation effect at the heat transfer interface accelerates the interlayer diffusion of heat for more uniform temperature distribution.The radiative heat dissipation emissivity obtained from the simulation is as high as 0.95,and the radiative heat dissipation behavior is more pronounced as the percentage of steel cord increases and the temperature rises.Compared to the series-parallel heat transfer model,the prediction error of the multiscale heat transfer model is reduced from 10.1%to 2.5%.