Evaluating the Effectiveness of Aluminum Coatings on Patch-Repaired Composites Using Electro-Thermal Analysis

• DOI: 10.3390/app15105529
• Publication Date: 2025-05-15T10:10:44Z
• Authors: Zezhong Shan; Yanghan Zhai; Kai Ma; Tianqin Song; Yigang Sun; Haoran Hun

Lightning-induced ablation can severely compromise the structural integrity of composite materials. While metallic coatings have been widely studied for lightning protection, this study focuses on a different application—applying aluminum to repaired The goal is address challenge ensuring that structures withstand subsequent strikes after repair. This utilized an electro-thermal coupling finite element analysis model assess damage laminates and effectiveness identical material patches repairs. It found although patched may experience more severe when subjected same strike, application coating significantly mitigate damage. Furthermore, improved scheme, investigating impact width shape its protection efficacy. results indicate cross-shaped provides significant advantages in protecting against with reduction compared uncoated controls. However, it was noted narrowing could limit coating’s ability handle high current densities, potentially affecting protective capabilities. These insights contribute advancement repair strategies development innovative