FLEXURAL BEHAVIORS OF SANDWICH COMPOSITES PRODUCED USING RECYCLED AND NATURAL MATERIAL

Öz

Recently, for making the low-cost engineering materials the use of natural fibers as reinforcement in polymers composites has brought forth a lot of interest. The use of natural products instead of synthetic materials reduces the amount of carbon released into the atmosphere. Nevertheless, reuse of used materials by recycled is important both for the environment and for economic reasons. In this study, flexural behaviors of sandwich composites manufactured by using natural and recycled material were investigated. In this context, 9 different core materials, which were made by using 3 different granules size (1 mm, 2 mm and 4 mm) and 3 different core thickness (4 mm, 8 mm and 12 mm), were manufactured from waste vehicle tires. After, sandwich composites were produced by combining the core materials with natural jute fabric reinforced laminated composites. In order to test the usability of the produced sandwich composite materials as building material, the flexural behaviors of the sandwich composite were investigated under three-point bending load. Test results show that flexural behavior of the material varies according to the granular size and thickness of the core material.

Anahtar Kelimeler

• Sandwich composite,flexural modulus,flexural strength,recycling,natural fibers,granule size,core thickness

GERİ DÖNÜŞTÜRÜLMÜŞ VE DOĞAL MALZEME KULLANILARAK ÜRETİLEN SANDVİÇ KOMPOZİTLERİNİN EĞİLME DAVRANIŞLARI

Öz

Son yıllarda, düşük maliyetli mühendislik malzemeleri üretebilmek için polimer malzemelerde takviye olarak doğal fiberler kullanımı üzerine ilgi artmaktadır. Sentetik malzemeler yerine doğal ürünlerin kullanılması atmosfere salınan karbon miktarını azaltmaktadır. Bununla birlikte, kullanılmış malzemelerin geri dönüştürülerek yeniden kullanılması hem çevre hem de ekonomik nedenlerden dolayı önemlidir.  Bu çalışmada, doğal ve geri dönüştürülmüş malzeme kullanılarak üretilen sandviç kompozitlerin eğilme davranışları incelenmiştir. Bu bağlamda, 3 farklı granül boyutu (1 mm, 2 mm ve 4 mm) ve üç farklı çekirdek kalınlığı (4 mm, 8 mm ve 12 mm) kullanılarak yapılan dokuz farklı çekirdek malzemesi kullanılmış taşıt lastiğinden imal edilmiştir. Daha sonra çekirdek malzemeler doğal jüt kumaş takviyeli tabakalı kompozitler ile birleştirilerek sandviç kompozitler üretildi. Üretilen sandviç kompozit malzemelerin yapı malzemesi olarak kullanılabilirliğini test etmek için, üç nokta eğilme yükü altında eğilme davranışları incelenmiştir. Test sonuçları, malzemenin eğilme davranışının, çekirdek malzemenin tanecik boyutuna ve kalınlığına göre değiştiğini göstermektedir.

Anahtar Kelimeler

• Sandviç kompozit,eğilme modülü,eğilme dayanımı,geri dönüşüm,doğal lifler,granül boyutu,çekirdek kalınlığı

Kaynakça

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