TY - JOUR T1 - FİBER KOMPOZİT ÇOK KATLI TÜPSEL SİLİNDİRLERİN BURULMA EKSENEL BASKI YÜKÜ VE DIŞ BASINÇ YÜKLEMELERİ ALTINDA BURKULMA DENKLEMLERİNİN ÇIKARILIŞLARI TT - DERIVATIONS OF BUCKLING EQUATIONS FOR THE MULTILAYERED FIBER COMPOSITE TUBULAR CYLINDERS UNDER TORSION AXIAL COMPRESSIVE LOAD AND EXTERNAL PRESSURE AU - Günay, Ezgi AU - Sivri, Cihan PY - 2013 DA - March JF - Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi JO - GUMMFD PB - Gazi Üniversitesi WT - DergiPark SN - 1300-1884 SP - 327 EP - 339 VL - 21 IS - 2 LA - tr AB - Bu çalışmada, çok katlı fiber kompozit silindirlerin denge denklemleri aynı anda etkiyen burulma, eksenel yükve dış basınç yüklemeleri altında burkulma analizi için incelenmiştir. Denge denklemleri, Klasik ve BirinciMertebeden Kayma Deformasyon Teorilerine göre olmak üzere her ikisi içinde, iki grup çıkarımlarda matrisformunda elde edilmişlerdir. Bu denklemlerin her birinde, başlangıç gerilme yüklemelerinin etkisi dikkatealınmıştır. Bütün bu ifadeler, üç değişik yüklemenin aynı anda etkidiği fiber kompozit silindirin dengedenklemleridir. Daha önce tanımlanmış olan iki ana teoriye göre çözümleme yapabilmek için, yerdeğiştirmelercinsinden elde edilen denge denklemleri ilgili yaklaşık seri açılımları ile birlikte kullanılarak tanımlanmışlardır.Elde edilen ifadeler, özdeğer probleminin sıkıştırılmış matris formunu veren şekliyle görülmüşlerdir. KW - Burkulma KW - ortotropik KW - fiber kompozit KW - denge denklemleri KW - özdeğer-problemi KW - silindir N2 - In this study, equilibrium equations of multi-layered fiber composite cylinders under combined torsion, axial force and external pressure were examined for buckling analysis. Equations of equilibrium were obtained for both Classical and First Order Shear Deformation Theories in the two groups of derivations as matrix equation. In each of these equations, initial stress loading was included. 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