Thermo-electro-mechanical postbuckling of piezoelectric FG-CNTRC beams with geometric imperfections

Wu, H, Kitipornchai, S and Yang, J 2016, 'Thermo-electro-mechanical postbuckling of piezoelectric FG-CNTRC beams with geometric imperfections', Smart Materials and Structures, vol. 25, no. 9, 95022, pp. 1-14.


Document type: Journal Article
Collection: Journal Articles

Title Thermo-electro-mechanical postbuckling of piezoelectric FG-CNTRC beams with geometric imperfections
Author(s) Wu, H
Kitipornchai, S
Yang, J
Year 2016
Journal name Smart Materials and Structures
Volume number 25
Issue number 9
Article Number 95022
Start page 1
End page 14
Total pages 14
Publisher Institute of Physics Publishing
Abstract This paper presents thermo-electro-mechanical postbuckling analysis of geometrically imperfect functionally graded carbon nanotube-reinforced composite (FG-CNTRC) hybrid beams that are integrated with surface-bonded piezoelectric actuators. The material properties of FG-CNTRCs are assumed to be temperature-dependent and graded in the thickness direction. By using a generic imperfection function, various possible imperfections with different shapes and locations in the beam are considered. The theoretical formulations are based on the first-order shear deformation beam theory with von-Karman nonlinearity. A differential quadrature approximation based iteration process is employed to obtain the postbuckling equilibrium path of piezoelectric FG-CNTRC hybrid beams under thermo-electro-mechanical loading. Parametric studies are conducted to examine the effect of geometric imperfection, distribution pattern and volume fraction of carbon nanotubes, temperature rise, actuator voltage, beam geometry and boundary conditions on the thermo-electro-mechanical postbuckling behaviour. The results show that the thermo-electro-mechanical postbuckling is considerably affected by the imperfection mode, half-wave number, location and amplitude, as well as the temperature rise and boundary conditions. The effect of applied actuator voltage is much less pronounced but tends to be relatively more noticeable as the slenderness ratio increases.
Subject Solid Mechanics
Keyword(s) differential quadrature method
functionally graded beam
carbon nanotube- reinforced composites
piezoelectric materials
thermo-electro-mechanical postbuckling
DOI - identifier 10.1088/0964-1726/25/9/095022
Copyright notice © 2016 IOP Publishing
ISSN 0964-1726
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Citation counts: TR Web of Science Citation Count  Cited 18 times in Thomson Reuters Web of Science Article | Citations
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