Elastic Limit of Functionally Graded Curved Panel Under Thermal Load

Year 2018, Volume: 23 Issue: 2, 383 - 398, 31.08.2018

Mehmet Haskul

https://doi.org/10.17482/uumfd.403578

Abstract

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

ISIL YÜK ALTINDA FONKSİYONEL DERECELENDİRİLMİŞ EĞRİ EKSENLİ PANELİN ELASTİK SINIRI

Abstract

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.

Keywords

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

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