Nonlinear vibration of functionally graded carbon nanotube-reinforced composite beams with geometric imperfections

Wu, H. L., Yang, J. and Kitipornchai, S. (2016) Nonlinear vibration of functionally graded carbon nanotube-reinforced composite beams with geometric imperfections. Composites Part B: Engineering, 90 86-86. doi:10.1016/j.compositesb.2015.12.007


Author Wu, H. L.
Yang, J.
Kitipornchai, S.
Title Nonlinear vibration of functionally graded carbon nanotube-reinforced composite beams with geometric imperfections
Journal name Composites Part B: Engineering   Check publisher's open access policy
ISSN 1359-8368
1879-1069
Publication date 2016-04-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.compositesb.2015.12.007
Open Access Status Not yet assessed
Volume 90
Start page 86
End page 86
Total pages 11
Place of publication Kidlington, Oxford United Kingdom
Publisher Pergamon Press
Collection year 2017
Language eng
Abstract The nonlinear vibration of imperfect shear deformable functionally graded carbon nanotube-reinforced composite (FG-CNTRC) beams is studied in this paper based on the first-order shear deformation beam theory and von Kármán geometric nonlinearity. A one-dimensional imperfection model in the form of the product of trigonometric and hyperbolic functions are used to describe the various possible geometric imperfections such as sine type, global, and localized imperfections. The governing equations are derived by employing the Ritz method and then solved by an iteration procedure. Special attention is given to the influences of imperfection mode, location, and amplitude on the nonlinear behaviour. The linear vibration is also discussed as a subset problem. Numerical results in tabular and graphical forms show that the nonlinear vibration behaviour of imperfect FG-CNTRC beams is considerably sensitive to sine type and global imperfections (except for G2-mode), whereas the effect of localized imperfection is much less pronounced. It is also observed that whether the FG-CNTRC beam exhibits the “hard-spring” or “soft-spring” vibration behaviour is largely dependent on the initial imperfection mode, its amplitude as well as the vibration amplitude.
Keyword B. Mechanical properties
B. Vibration
C. Analytical modelling
Functionally graded beam
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
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Created: Tue, 07 Mar 2017, 10:54:22 EST by Clare Nelson on behalf of School of Mechanical and Mining Engineering