Publication: Anizotropik Ortam İçindeki Elipsoidal Parçacığın Elastik Zorlanma Enerjisi
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ÖZET Bu çalışmada, Eshelby teorisi esas alınarak, anizotropik homojen kristal katılarda yapışık arayiizlü elipsoidal çökelmenin esnek zorlanma enerjisi elipsoidin eksen oranının ve anafaz ile çökelme arasındaki yönelimin fonksiyonu olarak hesaplandı. Sayısal metod kullanıldı. Genel elipsoidden birçok özel durum elde etmek mümkün olduğundan, çökelmenin bu biçimi tercih edildi. Hesaplanan esneklik enerjileri stereografik birim üçgen üzerinde çizildi ve toplam esneklik enerjisinin minimum olduğu eksen oranı ve yönelim elde edildi. Dönüşüm zorlanması referans olarak alman anafaz koordinatlarında sabit olduğu zaman, zorlanma enerjisinin ürün' ün eksen oranına bağlı olduğu gibi yönelimine de bağlı olduğu bulundu. IV
ABSTRACT In this work, on the basis of Eshelby theory, the elastic strain energy of coherent ellipsoidal precipitates in anisotropic homogeneous crystalline solids has been calculated as a function of the ellipsoid aspect ratio and the orientation relationship between precipitate and matrix. A numerical method has been used. Since the general ellipsoid is versatile enough to cover a wide variety of particular cases, this shape of precipitate has been prefered. The calculated strain energies have been depicted on the stereographic triangle, and the aspect ratio and the orientation relationship that lead to the minimization of the total strain energy have been obtained. When the transformation strain is fixed with respect to the reference matrix coordinates, it has been found that the strain energy is dependent on the orientation of the inclusion as well as on its aspect ratio.
ABSTRACT In this work, on the basis of Eshelby theory, the elastic strain energy of coherent ellipsoidal precipitates in anisotropic homogeneous crystalline solids has been calculated as a function of the ellipsoid aspect ratio and the orientation relationship between precipitate and matrix. A numerical method has been used. Since the general ellipsoid is versatile enough to cover a wide variety of particular cases, this shape of precipitate has been prefered. The calculated strain energies have been depicted on the stereographic triangle, and the aspect ratio and the orientation relationship that lead to the minimization of the total strain energy have been obtained. When the transformation strain is fixed with respect to the reference matrix coordinates, it has been found that the strain energy is dependent on the orientation of the inclusion as well as on its aspect ratio.
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Tez (yüksek lisans) -- Ondokuz Mayıs Üniversitesi, 1994
Libra Kayıt No: 36230
Libra Kayıt No: 36230
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89
