TABAKALI KOMPOZİT PLAKLARIN DÜŞÜK HIZLI DARBE ETKİSİNİN DENEYSEL ÇALIŞMASI

Bu çalışma düşük hızlı darbe yükü etkisi altında E-cam elyaf/epoxy tabakalı plakların tepkisinin incelenmesi ile ilgilidir. Darbe testleri, özel olarak tasarlanmış düşey ağırlık düşürme test cihazı kullanılarak yapılmıştır. Bu çalışmada 8 kat simetrik olarak tabakalanmış kompozitler kullanılmıştır. Bu kompozitler, [0/90]2s, [-30/30]2s, [-45/45]2s olarak üç faklı şekilde istiflenmiştir ve sonuçları birbirleri ile karşılaştırılmıştır. Hasar oluşumları numunede batmadan başlayarak tam delinme durumuna kadar kademeli olarak incelenmiştir. Çalışmalar 140mmx140mm’lik kare plakların iki ve dört taraflı ankastre bağlantı durumlarında yapılmıştır. Darbe yükleri plak ortalarına uygulanmıştır.

Anahtar Kelimeler:

Düşük hızlı darbe, E-cam fiber/epoxy, tabakalı kompozit malzemeler

AN EXPERIMENTAL STUDY OF LOW VELOCITY IMPACT RESPONSE FOR COMPOSITE LAMINATED PLATES

This paper deals with the response of E-glass/epoxy laminated plates subjected to low velocity impact loading. Impact tests were performed using a specially designed vertical drop-weight testing machine. The samples used for this study were 8 plies symmetric laminated composites. These composites were characterized by three different stacking sequences, [0/90]2s, [-30/30]2s, [-45/45]2s, and they were compared with each other. Specimens were impacted at constant weight and different impact energies. Damage processes examined step by step from initiation of damage to final perforation. The studies were carried out on plate dimension of 140mm x140mm with both four and two opposite sides clamped. Impact loads were applied at the center of each plate. Effect of different clamped cases, stacking sequences and impact energies were investigated on the composite structures.

Keywords:

Low velocity impact; E-glass/epoxy; laminated composite materials,

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