Electromagnetic-mechanical repair patch of radar-absorbing structure with electroless nickel-plated glass fabric damaged by lightning strike
- Jeong, Gi-Won; Noh, Yeong-Hoon; Choi, Won-Ho; Shin, Joon-Hyung; Kweon, Jin-Hwe; Yook, Jong-Gwan; Nam, Young-Woo
- Issue Date
- SAGE PUBLICATIONS LTD
- Radar-absorbing structure; lightning strike damage; composite repair; electrical properties; mechanical properties
- JOURNAL OF COMPOSITE MATERIALS, v.55, no.7, pp.989 - 1001
- Journal Title
- JOURNAL OF COMPOSITE MATERIALS
- Start Page
- End Page
- This paper presents an electromagnetic-mechanical repair patch (EMRP) to restore the mechanical and electromagnetic (EM) wave absorption performance of a radar-absorbing structure (RAS) damaged by lightning strike. Several researchers have primarily focused on ensuring high repair efficiency, particularly in terms of the primary load-bearing properties of repaired fiber-reinforced plastics. However, no study has proposed a practical repair approach that considers the multi-functionality of the radar-absorbing structure. The EMRP method can be used to repair lightning strike damage in a radar-absorbing structure with electroless nickel-plated glass fabric, considering the need to maintain structural integrity and electrical continuity to achieve a high repair efficiency. Damage due to an artificial lightning strike was assessed in terms of area and depth of the damage using image processing, ultrasonic C-scan, and micro X-ray inspection. The EM characteristics of one-dimensional return loss scanning and the echo radar-cross-section level were measured to verify the stealth performance of the repaired radar absorber in the X-band. In addition, the tensile test results demonstrated that the repaired radar absorber had a high recovery rate of 93% compared to the pristine radar absorber. The experimental results obtained in this study validate the use of the proposed EMRP method in repairing radar-absorbing structures.
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- 공학계열 > Division of Mechanical and Aerospace Engineering > Journal Articles
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