Coupled thermal–electrical analysis for carbon fiber/epoxy composites exposed to simulated lightning current

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• 作者：Toshio Ogasawara ; Yoshiyasu Hirano ; Akinori Yoshimura
• 关键词：A. Carbon fiber ; B. Delamination ; C. Numerical analysis ; D. Thermal analysis
• 刊名：Composites Part A: Applied Science and Manufacturing (Incorporating Composites and Composites Manufacturing)
• 出版年：2010
• 出版时间：August 2010
• 年：2010
• 卷：41
• 期：8
• 页码：973-981
• 全文大小：1998 K

文摘

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.