碳纤维增强复合材料雷击损伤实验及电-热耦合仿真
Experiment and electrical-thermal coupled simulation for lightning current damage of carbon fiber reinforced plastic

为了研究碳纤维增强复合材料(CFRP)在雷电流作用下的损伤规律,对CFRP进行了雷电流直接效应实验和电-热耦合效应仿真。首先,利用冲击电流发生装置进行了雷电流的直接效应实验,对比了不同电流峰值情况下CFRP的表面损伤情况,并通过C扫描观察了内部损伤。实验结果表明:CFRP的损伤范围随电流峰值增大而显著增大,且内部损伤的范围远大于表面损伤的范围。之后,对试件进行了电-热耦合有限元分析,并利用叠加的温度场范围近似表示内部损伤的范围,与实验结果的对比说明了此方法的有效性。不同类型及不同作用积分的冲击电流作用下的电-热耦合分析结果表明,作用积分是影响损伤范围的重要因素。 In order to study the damage law of carbon fiber reinforcement plastic (CFRP) caused by lightning current, direct effect experiment of lightning current and electrical-thermal coupled effect simulation for CFRP were carried out. At first, direct effect experiment of lightning current was implemented with the impulse current experiment apparatus. External damages subjected to currents with different peak-values were compared together, and internal damages were observed with C-scan. Experiment results show that damage range increases obviously with the increasing peak value of current, and the range of internal damage is much larger than that of the external damage. Then, electrical-thermal coupled finite element analysis of specimen was carried out, and the superimposed temperature field was approximately chosen to represent the range of internal damage. The comparison with the experiment results shows the effectiveness of this method. The results of thermal-electrical coupled analysis under impact currents with different types and action integrals show that the range of damage is greatly influenced by action integral. 国家自然科学基金(51477183, 51407198)