Abstract This study presents a quantitative evaluation of the structural impact of lightning strikes on glass/epoxy and Ni-glass/epoxy composites used in radar-absorbing structures (RAS), as well as the actual design of a 5-slab RAS. Image processing was utilized to evaluate the fiber and resin in the damaged area caused by lightning. The decrease in mechanical properties due to lightning strikes were evaluated by compression-after-lightning tests. As a result, penetration failures were observed when current flowed in the thickness direction in the dielectric composites and the 5-slab radar-absorbing structure. This penetration failure resulted in greater than 50% reduction of the residual compressive strength because the damage was distributed throughout the entire specimen thickness, even at low energy current intensities (0–30 kA). Therefore, considering application systems, it is necessary to design lightning protection systems to prevent penetration failure in order to apply radar-absorbing structures to actual aircraft structures.

中文翻译：

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雷击对镍玻璃/环氧树脂吸波结构结构性能的影响

摘要 本研究介绍了雷击对雷达吸收结构 (RAS) 中使用的玻璃/环氧树脂和镍玻璃/环氧树脂复合材料的结构影响的定量评估，以及 5 板 RAS 的实际设计。利用图像处理对雷击损坏区域的纤维和树脂进行评估。雷击引起的机械性能下降通过雷击后压缩试验进行评估。结果，当电流沿厚度方向在介电复合材料和 5 板吸波结构中流动时，观察到穿透失败。这种穿透失败导致残余抗压强度降低 50% 以上，因为损伤分布在整个试样厚度，即使在低能量电流强度 (0-30 kA) 下也是如此。所以，