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On the Buckling of Functionally Graded Cylindrical Shells Under Combined External Pressure and Axial Compression

[+] Author and Article Information
P. Khazaeinejad

Department of Mechanical Engineering, Arak Branch, Islamic Azad University, Arak 38135-567, Irankhazaeinejad@asme.org

M. M. Najafizadeh, J. Jenabi

Department of Mechanical Engineering, Arak Branch, Islamic Azad University, Arak 38135-567, Iran

M. R. Isvandzibaei

Department of Mechanical Engineering, Sinhgad College of Engineering, University of Pune, Ganeshkhind Road, Pune 411007, India

J. Pressure Vessel Technol 132(6), 064501 (Oct 15, 2010) (6 pages) doi:10.1115/1.4001659 History: Received January 25, 2010; Revised March 19, 2010; Published October 15, 2010; Online October 15, 2010

The stability problem of a circular cylindrical shell composed of functionally graded materials with elasticity modulus varying continuously in the thickness direction under combined external pressure and axial compression loads is studied in this paper. The formulation is based on the first-order shear deformation theory. A load interaction parameter is defined to express the combination of applied axial compression and external pressure. The stability equations are derived by the adjacent equilibrium criterion method. These equations are employed to analyze the buckling behavior and obtain the critical buckling loads. A detailed numerical study is carried out to bring out the effects of the power law index of functionally graded material, load interaction parameter, thickness ratio, and aspect ratio on the critical buckling loads. The validity of the present analysis was checked by comparing the present results with those results available in literature.

Copyright © 2010 by American Society of Mechanical Engineers
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Grahic Jump Location
Figure 1

FG cylindrical shell under load



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