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Steel and Composite Structures Volume 43, Number 6, June25 2022 , pages 797-808 DOI: https://doi.org/10.12989/scs.2022.43.6.797 |
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Vibration characteristics of functionally graded carbon nanotube-reinforced composite double-beams in thermal environments |
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Jing-Lei Zhao, Xu Chen, Gui-Lin She, Yan Jing, Ru-Qing Bai, Jin Yi, Hua-Yan Pu and Jun Lu
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| Abstract | ||
| This paper presents an investigation on the free vibration characteristics of functionally graded nanocomposite double-beams reinforced by single-walled carbon nanotubes (SWCNTs). The double-beams coupled by an interlayer spring, resting on the elastic foundation with a linear layer and shear layer, and is simply supported in thermal environments. The SWCNTs gradient distributed in the thickness direction of the beam forms different reinforcement patterns. The materials properties of the functionally graded carbon nanotube-reinforced composites (FG-CNTRC) are estimated by rule of mixture. The first order shear deformation theory and Euler-Lagrange variational principle are employed to derive the motion equations incorporating the thermal effects. The vibration characteristics under several patterns of reinforcement are presented and discussed. We conducted a series of studies aimed at revealing the effects of the spring stiffness, environment temperature, thickness ratios and carbon nanotube volume fraction on the nature frequency. | ||
| Key Words | ||
| double beam; first order shear deformation theory; functionally graded carbon nanotube-reinforced composite; thermal environment; vibration characteristics | ||
| Address | ||
| Jing-Lei Zhao, Xu Chen, Gui-Lin She, Yan Jing, Ru-Qing Bai, Jin Yi, Hua-Yan Pu and Jun Lu:College of Mechanical and vehicle Engineering, Chongqing University, Chongqing,400044, China | ||