CFRPラミナートの雷による損傷と残留強度に関する数値的研究
Qian-Zhi Yin1, Jiapeng Bian1, Yin Fan1
1School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China.
Polymers
|August 28, 2025
まとめ
この研究は,デラミネーションを含む炭素繊維強化ポリマー (CFRP) の複合材料における雷による損傷をモデル化しています. このモデルは,航空安全にとって極めて重要な 圧縮力の低下を正確に予測します.
科学分野:
- 材料科学
- 航空宇宙工学
- 計算力学
背景:
- 炭素繊維強化ポリマー (CFRP) の雷による損傷に関する数値的な研究は,しばしばデラミネーションを無視し,残留強度分析に影響を与えます.
- CFRP複合材料の雷による損傷の正確な予測は,航空宇宙の安全性と構造的整合性に不可欠です.
研究 の 目的:
- CFRP複合材料の雷によるデラミネーションと損傷を予測するための電気熱機械結合数値モデルを開発し,検証する.
- インプット・ロードとスタッキング・シーケンスがインターラミナー・パイロリシスとデラミネーションに及ぼす影響を調査する.
- 打ち上げ後の圧縮強度に対するデラミネーションの影響を定量的に評価する.
主な方法:
- デラミネーションをシミュレートするためにコヘージー要素を組み込んだ結合電熱機械数値モデルの作成.
- 異なる入力負荷 (電流の振幅,波形) と層の積み重ねのシーケンスに関するパラメトリックの調査.
- 衝突後のシミュレートされた単軸の最終圧縮負荷に基づく量的な損傷評価.
主要な成果:
- デラミネーションを組み込んだモデルは,デラミネーション (21.12%) を無視したモデルと比較して,実験結果 (36.72%) と密接に一致する圧縮強さの28.91%の減少を予測しました.
- 熱分解は,特に熱と衝撃波の負荷を組み合わせた場合,圧縮強度の低下に大きく貢献します.
- 雷の波形 (C対D) は損傷メカニズムに影響を与えます. C波形は弧の熱効果を考慮する必要があり,D波形は衝撃負荷と熱効果を伴う. より高い電流幅と対称な積み重ねのシーケンスが損傷を悪化させる.
結論:
- 開発されたモデルは,熱分解と機械分解を統合することにより,マルチ物理の忠誠度を高めます.
- CFRPの雷による損傷におけるデラミネーションの重要な役割を強調し,数値モデルに含めることが必要である.
- この研究は,高度な航空宇宙複合構造における 雷打撃抵抗性を最適化するための基礎的な洞察を提供します.
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