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http://dx.doi.org/10.12989/scs.2017.24.6.727

Mathematical modelling of the stability of carbon nanotube-reinforced panels  

Sobhani Aragh, B. (Young Researchers and Elite Club, Arak Branch, Islamic Azad University)
Publication Information
Steel and Composite Structures / v.24, no.6, 2017 , pp. 727-740 More about this Journal
Abstract
The present paper studies the stability analysis of the continuously graded CNT-Reinforced Composite (CNTRC) panel stiffened by rings and stringers. The Stiffened Panel (SP) subjected to axial and lateral loads is reinforced by agglomerated CNTs smoothly graded through the thickness. A two-parameter Eshelby-Mori-Tanaka (EMT) model is adopted to derive the effective material moduli of the CNTRC. The stability equations of the CNRTC SP are obtained by means of the adjacent equilibrium criterion. Notwithstanding most available literature in which the stiffener effects were smeared out over the respective stiffener spacing, in the present work, the stiffeners are modeled as Euler-Bernoulli beams. The Generalized Differential Quadrature Method (GDQM) is employed to discretize the stability equations. A numerical study is performed to investigate the influences of different types of parameters involved on the critical buckling of the SP reinforced by agglomerated CNTs. The results achieved reveal that continuously distributing of CNTs adjacent to the inner and outer panel's surface results in improving the stiffness of the SP and, as a consequence, inclining the critical buckling load. Furthermore, it has been concluded that the decline rate of buckling load intensity factor owing to the increase of the panel angle is significantly more sensible for the smaller values of panel angle.
Keywords
panel structure; buckling stability; Generalized Differential Quadrature Method (GDQM); polymer matrix; two-parameter Eshelby-Mori-Tanaka (EMT); carbon-nanotubes; third-order shear deformation theory;
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Times Cited By KSCI : 3  (Citation Analysis)
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