Preliminary analysis of thermal response of dielectric and conducting composite structures durnig lightning strike

• Autorzy: Katunin A. , Krukiewicz K.

Warianty tytułu

PL

Wstępna analiza odpowiedzi cieplnej dielektrycznych i przewodzących struktur kompozytowych podczas uderzenia pioruna

• Języki publikacji: EN

Abstrakty

EN

The phenomenon of a lightning strike occurring during aircraft operation may seriously affect the integrity of its components due to the electrically insulating properties of polymers and polymeric composites used for manufacturing the fuselage elements of an aircraft. Due to the very high magnitude of temperature fields appearing during lightning strikes, decomposition and vaporization of the matrix and reinforcement materials occur. This results in a pyrolysis reaction and leads to rapid degradation of polymeric composites. One of the ways to limit such degradation is to make the matrix electrically conducting. Such a material is currently being developed by the authors’ team. In order to perform preliminary evaluation of the ability of the new material to minimize temperature magnitude and degradation during a lightning strike, a comparative study with a carbon fiber-reinforced polymeric composite, typical for aircraft applications, was performed. The comparative analysis was performed based on the coupled thermal-electrical analytical model of the considered composites subjected to a lightning strike. The obtained results show that the developed material, due to its electrical conductivity, receives much less thermal energy during a lightning strike and thus, minimizes degradation processes.

PL

Zjawisko uderzenia pioruna występujące podczas eksploatacji statków powietrznych może istotnie wpływać na integralność ich elementów ze względu na właściwości elektrycznej izolacji polimerów i kompozytów polimerowych stosowanych przy wytwarzaniu elementów kadłubów samolotów. Ze względu na bardzo wysokie wartości pól temperatury powstających podczas uderzeń piorunów zachodzi dekompozycja i odparowywanie materiałów osnowy i wzmocnienia. Powoduje to reakcję pirolizy i prowadzi do szybkiej degradacji kompozytów polimerowych. Jednym ze sposobów ograniczenia takiej degradacji jest wykorzystanie osnowy polimerowej zdolnej do przewodzenia prądu. Taki materiał jest obecnie opracowywany przez zespół autorów. W celu dokonania wstępnej oceny zdolności nowego materiału do minimalizacji wartości temperatury i degradacji podczas uderzenia pioruna przeprowadzono badania porównawcze z kompozytem polimerowym umacnianym włóknem węglowym, typowym w zastosowaniach lotniczych. Analiza porównawcza została przeprowadzona w oparciu o sprzężony termoelektryczny model analityczny rozpatrywanych kompozytów poddanych uderzeniu pioruna. Uzyskane wyniki wskazują, że opracowywany materiał, ze względu na swoją przewodność elektryczną, otrzymuje znacznie mniej energii cieplnej podczas uderzenia pioruna, a tym samym minimalizuje procesy degradacji.

Słowa kluczowe

EN

aircraft structures; lightning strike; conducting polymers; electrical conductivity; heat-induced structural degradation

PL

struktury lotnicze; uderzenie pioruna; polimery przewodzące; przewodność elektryczna; degradacja strukturalna indukowana ciepłem

• Wydawca: Polskie Towarzystwo Materiałów Kompozytowych
• Czasopismo: Composites Theory and Practice
• Rocznik: 2016
• Tom: R. 16, nr 1
• Strony: 8--14
• Opis fizyczny: Bibliogr. 37 poz., rys., tab.

Twórcy

autor

Katunin A.

• Silesian University of Technology, Institute of Fundamentals of Machinery Design,ul. Konarskiego 18A, 44-100 Gliwice, Poland

autor

Krukiewicz K.

• Silesian University of Technology, Department of Physical Chemistry and Technology of Polymers, ul. Strzody 9, 44-100 Gliwice, Poland

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.