Modeling of in-plane non-uniform flame spread behaviors of CFRPs: Development in universal three-dimensional flame spread model

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K14906
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 19020:Thermal engineering-related
• Research Institution: Gifu University
• Principal Investigator: Kobayashi Yoshinari 岐阜大学, 工学部, 助教 (00827016)
• Project Period (FY): 2019-04-01 – 2021-03-31
• Keywords: 炭素繊維強化プラスチック / 燃え拡がり / 炭素繊維配合方向 / 熱的異方性 / 限界酸素濃度 / 燃え拡がり速度

Outline of Final Research Achievements

Past studies on flame spread over solid materials targeted isotropic materials such as acrylic resins. Conventional flame spread models, therefore, assume such materials. On the other hand, carbon fiber reinforced plastics (CFRPs) are found to become anisotropic depending on carbon fiber orientation. Thus, the conventional models could not deal with the CFRPs. This work then fabricated CFRP sheets with different carbon fiber orientations and investigated their flame spread behaviors. Furthermore, it addressed the modeling of flame spread behaviors of CFRPs. Finally, a novel flame spread model which involves the solid-phase heat transfer via the carbon fibers was developed, and flame spread rates calculated via the developed model agreed with the experimental flame spread rates.

Free Research Field

燃焼工学

Academic Significance and Societal Importance of the Research Achievements

本研究で得られた知見および成果は，火災安全という点から固体材料の燃焼性評価に貢献することが期待できる．特に，構築した燃え拡がりモデルは，従来の燃え拡がりモデルではカバーできなかった異方材料にも適用することが可能であるため，より広範な材料の燃え拡がり挙動を予測することができる．今後は，当モデルをベースに限界酸素濃度や燃え拡がり速度などの特性値を定量予測できるよう高精度化していく．