Coupled Thermal-Electrical Analysis for Carbon Fiber Composites Exposed to Simulated Lightning Current
Coupled Thermal-Electrical Analysis for Carbon Fiber Composites Exposed to Simulated Lightning Current
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DOI：
10.2322/jjsass.57.336
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发表时间：
2010-08
期刊：
影响因子：
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通讯作者：
T. Ogasawara;Y. Hirano;A. Yoshimura
中科院分区：
文献类型：
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作者：
T. Ogasawara;Y. Hirano;A. Yoshimura
摘要对碳纤维增强聚合物复合材料（CFRP）在模拟雷电流作用下的损伤行为进行了热电耦合分析，并将数值计算结果与实验结果进行了比较。基于实验结果和初步分析，揭示了CFRP热分解后沿厚度方向导电的具体机理，为准确的数值模拟提供了一个关键参数。特别地，假设厚度方向上的电导率在从环氧树脂分解温度到碳升华温度的范围内相对于温度是线性的，产生了合理的数值结果。根据数值计算结果和碳纤维布的热分解行为估算了分层面积和损伤深度，估算的损伤面积与实验结果定性吻合。数值结果表明，焦耳热产生显着影响雷击损伤。
Abstract A coupled thermal–electrical analysis of carbon fiber reinforced polymer composites (CFRP) exposed to simulated lightning current was conducted in order to elucidate the damage behavior caused by a lightning strike with the numerical results being compared to experimental results. Based on the experimental results and a preliminary analysis, the specific mechanism of electrical conduction through the thickness direction of CFRP following thermal decomposition was revealed to be a key parameter for accurate numerical simulation. In particular, assuming the electrical conductivity in the thickness direction to be linear with respect to temperature in the range from the epoxy decomposition temperature to carbon sublimation temperature produced reasonable numerical results. The delamination area and damage depth were estimated from numerical results and thermal decomposition behavior of CFRP with the estimated damage area agreeing qualitatively with the experimental results. Numerical results suggest that Joule heat generation significantly influences lightning strike damage.