Free Vibrations of Functionally Graded Circular Cylindrical Shells under Internal Pressure

ADMT Journal

مقاله 7، دوره 6، شماره 4، اسفند 2013   

نویسندگان

A. Davar¹؛ S. Mohammad Reza Khalili²؛ H. Hadavinia^{* 3}

¹Islamic Azad University

²K.N. Toosi University of Technology

³Kingston University, London, UK

چکیده

Free vibration of simply supported circular cylindrical shell made of Functionally Graded Material (FGM) under internal pressure was investigated. The effective material properties are assumed to vary continuously along the thickness direction according to a volume fraction power law distribution. First order shear deformation theory based on Love's first approximation theory was utilized in the equilibrium equations. The effects of FGM parameters such as material configuration and power law exponent, internal pressure as well as geometrical parameters such as thickness to radius and length to radius ratios on the vibration behavior were investigated. The validation of the results was achieved by comparing with those available in the literature. The results show that the vibration characteristics of Functionally Graded (FG) shells are greatly influenced by FGM parameters. Also, internal pressure and geometrical parameters considerably influence the frequency behavior regarded to different values of FGM parameters.