BASINÇ RİJİTLİĞİNİN HİDROSTATİK BASINÇ ETKİSİ ALTINDAKİ KATMANLI KOMPOZİT SİLİNDİRLERİN BURULMALI BURKULMALARINA ETKİSİ
Bu çalışmada hidrostatik basınç altındaki ince ve orta kalınlıkta katmanlı kompozit kusursuzsilindirlerin burkulmasında basınç rijitliğinin etkisi araştırılmıştır. Sayısal neticeler dejenere-eğri birkabuk elemanı kullanılarak elde edilmiştir. Öncelikle bir doğrulama problem çözülmüş ve elemanbasınç rijitliğini içeren stabilite tahkiki için doğrulanmıştır. Daha sonra, dik-açılı ve eğik-açılı katmanlıkompozit silindirler seçilen uzunluk/çap değerleri ve katman düzenleri için incelenmiştir. Elde edilenneticeler basınç rijitliğinin özellikle kalın otrotropik silindirlerde burulmalı burkulmayı engellediğinigöstermektedir.
THE INFLUENCE OF PRESSURE STIFFNESS ON THE TORSIONAL BUCKLING OF LAMINATED COMPOSITE CYLINDERS UNDER EXTERNAL HYDROSTATIC PRESSURE
In this study, the influence of pressure stiffness on the torsional buckling of thin andmoderately thick laminated composite perfect cylinders under external hydrostatic pressure isinvestigated. A degenerated-curved shell element is used to obtain the numerical results. First, averification problem is solved and the element is validated for stability analysis including pressurestiffness. Then, cross-ply and angle-ply laminated composite cylinders are examined for selected lengthradiusratios and stacking sequences. The results obtained show that, pressure stiffness may have astabilizing effect against torsional buckling especially for thick orthotropic cylinders.
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