期刊
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
卷 30, 期 4, 页码 571-583出版社
ELSEVIER
DOI: 10.1016/j.euromechsol.2011.01.005
关键词
Nonlinear vibration; Post-buckling analysis; Functionally graded beams; Nonlinear elastic foundation
类别
In this study, simple analytical expressions are presented for large amplitude free vibration and post-buckling analysis of functionally graded beams rest on nonlinear elastic foundation subjected to axial force. Euler-Bernoulli assumptions together with Von Karman's strain-displacement relation are employed to derive the governing partial differential equation of motion. Furthermore, the elastic foundation contains shearing layer and cubic nonlinearity. He's variational method is employed to obtain the approximate closed form solution of the nonlinear governing equation. Comparison between results of the present work and those available in literature shows the accuracy of this method. Some new results for the nonlinear natural frequencies and buckling load of the FG beams such as the effect of vibration amplitude, elastic coefficients of foundation, axial force, and material inhomogenity are presented for future references. (C) 2011 Elsevier Masson SAS. All rights reserved.
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