Fiber Metal Laminat Malzemelerde Kompozit Katman Kalınlığının Düşük Hızda Darbe Davranışına Etkisinin Sayısal ve İstatistiksel Olarak İncelenmesi

Öz

Havacılık alanında daha hafif araç tasarlayarak yakıt maliyetleri düşürmek böylelikle daha çevreci hava araçları üretmek en önemli konuların başında gelmektedir. Bu durum uçak üretici firmaların daha hafif ve dayanıklı malzeme arayaşına yöneltmiştir. Bu sebepten dolayı özellikle havacılık endüstrisinde üstün yorulma ve darbe dayanımı özelliklerinden dolayı kullanılan Fiber Metal Laminat(FML) yapılar ilgi çekmektedir. FML hibrit yapı ailesinin en özgün üyesi olan karbon elyaf takiviyeli alüminyum plakalara(CARALL) araştırmacıların ilgisini çekmektedir. Bu çalışmada farklı kompozit katman kalınlığına sahip CARALL FML yapıların farklı enerji yüklemesi(8J-12J-18J) ve farklı vurucu tiplerinde(Ø15 ve Ø20) düşük hızda darbe davranışı istatiksel olarak incelenmiştir. CARALL FML yapılar 2/1 dizilimde (Al-〖0°〗_([1])-Al, Al-〖0°〗_([3])-Al, Al-〖0°〗_([5])-Al) olacak şekilde LS-DYNA sonlu elemanlar programında modellenmiştir. Enerji yüklemesinin artmasıyla beraber Fmax tepe yükünün arttığı gözlemlenmiştir. Vurucu çapının artması absorbe edilen enerji miktarını düşürürken geri tepmeyi artırmıştır.

Anahtar Kelimeler

• Fiber Metal Laminat
• Düşük hızda darbe
• composite
• CFRP
• FML
• Sayısal Analiz
• CARALL
• ANOVA

Numerical and Statistical İnvestigation Of The Effect Of Composite Layer Thickness On Low-Velocity İmpact Behaviour in Fibre Metal Laminate Materials

Öz

In the field of aviation, reducing fuel costs by designing lighter vehicles and thus producing more environmentally friendly aircraft is one of the most important issues. This situation has led aircraft manufacturers to search for lighter and more durable materials. For this reason, Fibre Metal Laminate (FML) structures, which are used especially in the aerospace industry due to their superior fatigue and impact resistance properties, attract attention. Carbon fibre reinforced aluminium plates (CARALL), the most unique member of the FML hybrid structure family, has attracted the attention of researchers. In this study, the low velocity impact behaviour of CARALL FML structures with different composite layer thicknesses at different energy loading (8J-12J-18J) and different impactor types (Ø15 and Ø20) were statistically investigated. CARALL FML structures were modelled in 2/1 arrangement (Al-〖0°〗_([1])-Al, Al-〖0°〗_([3])-Al, Al-〖0°〗_([5])-Al) in LS-DYNA finite element programme. It is observed that the peak load Fmax increases with increasing energy loading. The increase in striker diameter decreased the amount of absorbed energy and increased the rebound.

Anahtar Kelimeler

• Fiber Metal Laminat
• Low-velocity impact
• composite
• CFRP
• FML
• Numerical Analysis
• CARALL
• ANOVA

Kaynakça

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