CRITICAL BUCKLING LOAD ANALYSIS OF LAYERED FUNCTIONALLY GRADED SHELL STRUCTURES

Bu çalışmada, silisyum nitrür (Si3N4)/paslanmaz çelik (SUS304) derecelendirilmiş kabuk yapıların birinci mod için kritik burkulma yük analizi çalışılmıştır. Kabuk yapılar üç tabakalı olarak düşünülmüş ve tabaka pozisyonları L9 (33) ortogonal diziye göre gerçekleştirilmiştir. Tabakaların mekanik özellikleri, kompozit malzeme karışımının basit kuralına bağlı olarak hesaplanmıştır. Tabakaların mekanik özellikleri kontrol faktörleri olarak kabul edilmiştir. Optimum tabaka seviyeleri sinyal gürültü (S/N) analizi kullanılarak elde edilmiştir. Sonuçlar üzerinde önemli tabakalar ve onların yüzde katkıları varyans analizi (ANOVA) kullanılarak tespit edilmiştir. Maksimum burkulma yük değeri optimum tabakaların farklı sıralamasına bağlı gerçekleştirilmiştir

Anahtar Kelimeler:

Kabuk Yapılar, Fonksiyonel Derecelendirilmiş Malzemeler, Burkulma, Sonlu Elemanlar Yöntemi

TABAKALI FONKSİYONEL DERECELENDİRİLMİŞ KABUK YAPILARIN KRİTİK BURKULMA YÜKÜ ANALİZİ

In this study, critical buckling load analysis for first mode of layered functionally graded shell structures made of silicon nitride (Si3N4)/stainless steel (SUS304) systems is studied. The shell structures are considered as three layers and the layer positions are carried out according to L9 (33) orthogonal array. The mechanical properties of the layers are calculated according to a simple rule of mixture of composite materials. The mechanical properties of the layers is assumed to be control factors. Optimum layer levels are obtained using signal to noise (S/N) analysis. Significant layers and their percent contributions on the results are detected using analysis of variance (ANOVA). Maximum buckling load value is carried out based on different arrangements of optimum layer levels

Keywords:

Shell Structures, Functionally Graded Materials, Buckling, Finite Element Method,

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