Lightning damage mechanism elucidation and multiphysics numerical analysis of carbon fiber reinforced polymer composites for aircraft structures

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H02342
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 24010:Aerospace engineering-related
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Ogasawara Toshio 東京農工大学, 工学(系)研究科(研究院), 教授 (20344244)
• Co-Investigator(Kenkyū-buntansha): 平野 義鎭 国立研究開発法人宇宙航空研究開発機構, 航空技術部門, 主任研究開発員 (90425786)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 航空宇宙工学 / 複合材料 / 落雷 / 損傷・破壊 / 数値解析

Outline of Final Research Achievements

To elucidate the mechanism of lightning damage in CFRP for aircraft structures, the following were conducted: elucidation of lightning damage phenomena in CFRP to which an impulse current is directly applied; identification and verification of electrical and mechanical loads on CFRP in a simulated lightning test by experiment; and multiphysics numerical analysis of lightning damage using thermal-electrical coupling. Based on the experimental results, a coupled thermo-electrical strike damage analysis model was developed, taking into account the nonlinear I-V characteristics in the CFRP thickness direction and the time evolution of the arc root near the current source. It was confirmed that the analytical results were consistent with the experimental results.

Free Research Field

航空宇宙工学

Academic Significance and Societal Importance of the Research Achievements

航空機用炭素繊維強化プラスチック（CFRP）における非線形の電流-電圧挙動を実験的に解明し、この現象を考慮することによって、雷撃による損傷挙動を精度良く予測できることを明らかにした。この成果は、航空機のみならずエネルギーやインフラなどCFRPの適用が拡大している多くの分野において有用であり、社会的な意義も高い。また、耐雷撃損傷性に優れた材料開発にも寄与できる。