Oluklu alüminyum sandviç panellerde kor yüksekliğinin enerji sönümleme kapasitesine olan etkisi

Yıl 2020, , 17 - 26, 25.10.2019

Cenk Kılıçaslan , Musatafa Güden

https://doi.org/10.17341/gazimmfd.639834

Öz

Bu
çalışmada, sert lehim ve poliüretan ile birleştirilmiş oluklu kora sahip
alüminyum sandviç yapıların enerji sönümleme kapasiteleri incelenmiştir.
Sandviç yapılarda kor olarak yamuk ikizkenar şeklinde zikzak 1050 H14 Al
alaşımından yapılmış olan oluklu katmanlar ile yüz ve ara plakalar
kullanılmıştır. Her bir sandviç panel, 0°/0° veya 0°/90° kor oryantasyonuna
sahiptir. Çalışmada kullanılan oluklu korlar geleneksel oluklu korlara kıyasla
daha küçüktür ve 3 mm yüksekliğe sahiptir. Darbe testleri 3 ve 6 m/s hızlarında
küresel projektörler ile gerçekleştirilmiştir. Poliüretan ile birleştirilmiş sandviç
yapıların bir kısmı ayrıca 6 m/s darbe hızında düz ve konik projektörler ile
test edilmiştir. Oluklu korların deformasyon tipinin belirlenmesi amacıyla
deneyin nümerik simülasyonu LS-DYNA programı ile oluşturulmuştur. Düz ve konik
projektörler ile test edilen paneller tamamen delinmiştir ve 0°/0° kor
oryantasyonunda daha çok enerji sönümlemiştir. Küresel projektörler ile test
edilen paneller ise delinmemiştir ve enerji sönümleme değerleri 0°/90° kor
oryantasyonunda daha yüksektir. Panellerin enerji sönümleme kapasiteleri aynı
şekle sahip ancak 9 mm yüksekliğindeki oluklu korlu sandviç paneller ile
karşılaştırılmıştır. Çalışma sonunda kor yüksekliğinin artması ile efektif
ezilme uzunluğunun arttığı ve darbe enerjisinin panele daha homojen olarak
dağıtıldığı görülmüştür.

Anahtar Kelimeler

Simülasyon, sandviç, kor, darbe

Kaynakça

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