ISIL YÜK ALTINDA FONKSİYONEL DERECELENDİRİLMİŞ EĞRİ EKSENLİ PANELİN ELASTİK SINIRI

Bu çalışmada, radyal doğrultuda ısıl yüke maruz kalan fonksiyonel derecelendirilmiş silindirik eğri eksenli panelin elastik davranışı analitik olarak incelenmiştir. Eğri eksenli panelin elastisite modülünün radyal doğrultuda üstel parametreye bağlı olarak değiştiği varsayılmıştır. Panelin düzlem şekil değiştirme durumunda olduğu göz önüne alınmıştır. Panelin malzeme özellikleri üstel parametredeki değişimin etkisi ve genel karışım kanunu ile birlikte ele alındığında; panelin bütün özellikleri (Poisson oranı hariç) radyal doğrultuda değiştiği hesaba alınarak detaylı bir çalışma yapılmıştır. Elastik sınırlar von Mises akma kriterine göre belirlenmiştir. Pozitif ve negatif sıcaklıkta akmanın; panelin iç yüzeyinde, dış yüzeyinde veya aynı anda her iki yüzeyde başladığı gözlemlenmiştir. Sayısal sonuçlar alüminyum/çelik fonksiyonel derecelendirilmiş panel için grafikler halinde sunulmuştur.

Anahtar Kelimeler:

von Mises Kriteri, Fonksiyonel Derecelendirilmiş Malzeme (FDM), Eğri Eksenli Panel

Elastic Limit of Functionally Graded Curved Panel Under Thermal Load

In this study, the elastic behavior of a functional graded cylindrically curved panel subjected to thermal load in the radial direction is analytically investigated. It is assumed that the elasticity module of the curved panel changes in the radial direction depending on the exponential parameter. It is considered that the panel is in plane strain state. The material properties of the panel are considered together with the effect of the change in the exponential parameter and the general mixture law; all the characteristics of the panel (except for the Poisson ratio) has made a detailed study taking into account the changes in the radial direction. The elastic limit is determined according to the von Mises yield criterion. To yield in the positive and negative temperature; the panel inner surface, outer surface or both surfaces at the same time is observed to start. Numerical results are presented in graphical form for aluminum / steel functionally graded panel.

Keywords:

von Mises Criterion, Functionally Graded Material (FGM), Curved Panel,

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