Free Vibration Analysis of a Functionally Graded Material Coated Aluminum Beam
Küçük Resim Yok
Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Amer Inst Aeronautics Astronautics
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This paper presents a theoretical investigation on the free vibration of a symmetric beam consisting of an aluminum core coated with functionally graded material. The elastic modulus and density are varied throughout the thickness of the coating material with both a polynomial and an exponential function, whereas a classical lamination theory is applied to determine the effective elastic modulus and density. To model the gradually changing mechanical properties in a truthful way, the coating is represented by 25 layers of material, whereas each layer itself is homogeneous and isotropic. To obtain a numerical solution, the Timoshenko finite element model beam theory (which also takes first-order shear deformation effects into account) is used. For this purpose, a finite element code is written in MATLAB and the natural frequencies of the beam are found. A detailed parametric study is conducted to show the influences of the core thickness to beam height ratio (h/H), the beam span to height ratio (L/H), the exponential function and power law index n, and multiple boundary conditions on the natural beam frequencies. It was observed that the studied parameters had a significant effect on the natural frequencies.
Açıklama
Anahtar Kelimeler
Timoshenko Beam
Kaynak
Aiaa Journal
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
58
Sayı
2
