Imperfection sensitivity of thermal post-buckling behaviour of functionally graded carbon nanotube-reinforced composite beams

Wu, Helong, Kitipornchai, Sritawat and Yang, Jie (2017) Imperfection sensitivity of thermal post-buckling behaviour of functionally graded carbon nanotube-reinforced composite beams. Applied Mathematical Modelling, 42 735-752. doi:10.1016/j.apm.2016.10.045


Author Wu, Helong
Kitipornchai, Sritawat
Yang, Jie
Title Imperfection sensitivity of thermal post-buckling behaviour of functionally graded carbon nanotube-reinforced composite beams
Journal name Applied Mathematical Modelling   Check publisher's open access policy
ISSN 0307-904X
1872-8480
Publication date 2017-02-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.apm.2016.10.045
Open Access Status Not yet assessed
Volume 42
Start page 735
End page 752
Total pages 18
Place of publication New York, NY, United States
Publisher Elsevier
Language eng
Subject 2611 Modelling and Simulation
2604 Applied Mathematics
Abstract This paper investigates the imperfection sensitivity of thermal post-buckling behaviour of functionally graded carbon nanotube-reinforced composite (FG-CNTRC) beams subjected to in-plane temperature variation. The material properties of FG-CNTRCs are assumed to be graded in the thickness direction and temperature-dependent. A generic imperfection function is used to model various possible imperfections, including sine type, global and localized imperfections. The governing equations are derived based on the first-order shear deformation beam theory and von-Kármán geometric nonlinearity. The differential quadrature method in conjunction with modified Newton–Raphson technique is employed to determine the thermal post-buckling equilibrium path of imperfect FG-CNTRC beams. Thermal buckling is treated as a subset problem. A parametric study is conducted to examine the effects of imperfection mode, half-wave number, location and amplitude on their thermal post-buckling performance. The influences of distribution pattern and volume fraction of carbon nanotubes, boundary conditions and slenderness ratio are discussed as well. The results indicate that the thermal post-buckling is highly sensitive to the imperfection mode, half-wave number, location as well as its amplitude. It is also shown that the clamped-clamped FG-CNTRC beam is more sensitive to imperfections than those with other boundary conditions whereas other parameters do not substantially affect the imperfection sensitivity of thermal post-buckling behaviour.
Keyword Carbon nanotube-reinforced composite
Differential quadrature method
Functionally graded beam
Geometric imperfection
Thermal post-buckling
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
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