Effects of Shape Memory Alloys and Carbon Nanotubes on the Nonlinear Aerothermal Flutter Characteristics of Hybrid Nanocomposite Beam

Document Type : Research Article

Authors

Department of Mechanical Engineering, Malayer University, Malayer, Iran

Abstract

 In this study, the effect of aerodynamic and thermal forces on the flutter stability of an epoxy / fiber-based hybrid nanocomposite beam containing shape memory alloy wires and reinforced by functionally graduated distribution of carbon nanotubes are investigated. Carbon nanotubes help to increase the stiffness of the nanocomposite beam, and the shape memory alloys will increase the flutter stability boundaries by inducing tensile stress in the beam due to the increase in temperature and the aerodynamic pressure. In this study, the Brinson model is supposed to present the properties of shape memory alloy wires, also, the Euler-Bernoulli beam model is assumed to be in line with van-Karmen nonlinear strains. The boundaries of buckling stability and aerothermodynamics flutter have been investigated by studying the natural frequencies of the hybrid nanocomposite beam and the thermal bifurcation points. The primary objective of this study is to examine the impact of carbon nanotubes and shape memory alloy wire on improving the behavior of a composite beam flutter under the effect of airflow and temperature increase, simultaneously. The results showed that applying these two advanced reinforcing materials has a significant impact on increasing the static and dynamic stabilities of hybrid nanocomposite beams in the thermo-aerodynamic environment.

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References

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AUT Journal of Mechanical Engineering
Volume 6, Issue 2
June 2022
Pages 217-228

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