Sıcaklığa maruz fonksiyonel derecelendirilmiş malzemeden yapılmış eğri eksenli kirişte plastik akmanın başlaması

Year 2020, Volume: 26 Issue: 4, 587 - 593, 20.08.2020

Mehmet Haskul

Abstract

Bu çalışmada fonksiyonel derecelendirilmiş malzemeden yapılmış silindirik olarak eğri eksenli kirişin elastik davranışı analitik olarak incelenmiştir. Çalışmada elastisite modülü üstel kuvvete bağlı olarak kirişin kalınlığı boyunca değiştiği varsayılmaktadır. Aynı zamanda genel lineer karışım kanunu uygulanarak, diğer özellikleri de (ısıl genleşme katsayısı, ısı iletim katsayısı, akma dayanımı) üstel kuvvete göre değişmektedir. Poisson oranı ise sabit kalmakta değişmemektedir. Kirişe uygulanan sıcaklık dağılımı kirişin kalınlığı doğrultusunda ve radyal koordinatın bir fonksiyonu olarak değişmektedir. Kiriş düzlem gerilme durumunda olduğu varsayılmaktadır. Elastik davranışı belirlemek için von Mises akma kriteri kullanılmıştır. Kirişe pozitif, negatif ve homojen sıcaklıklar uygulanmış ve akmanın iç yüzeyde, dış yüzeyde ve aynı anda her iki yüzeyde başladığı görülmüştür.

Keywords

Fonksiyonel derecelendirilmiş malzeme, Sıcaklık etkisi, von Mises kriteri, Eğri eksenli kiriş

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