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http://dx.doi.org/10.12989/scs.2019.31.6.641

Hygro-thermal wave propagation in functionally graded double-layered nanotubes systems  

She, Gui-Lin (State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University)
Ren, Yi-Ru (State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University)
Yuan, Fuh-Gwo (Department of Mechanical and Aerospace Engineering, North Carolina State University)
Publication Information
Steel and Composite Structures / v.31, no.6, 2019 , pp. 641-653 More about this Journal
Abstract
In this paper, wave propagation is studied and analyzed in double-layered nanotubes systems via the nonlocal strain gradient theory. To the author's knowledge, the present paper is the first to investigate the wave propagation characteristics of double-layered porous nanotubes systems. It is generally considered that the material properties of nanotubes are related to the porosity and hygro-thermal effects. The governing equations of the double-layered nanotubes systems are derived by using the Hamilton principle. The dispersion relations and displacement fields of wave propagation in the double nanotubes systems which experience three different types of motion are obtained and discussed. The results show that the phase velocities of the double nanotubes systems depend on porosity, humidity change, temperature change, material composition, non-local parameter, strain gradient parameter, interlayer spring, and wave number.
Keywords
wave propagation; double-layered nanotubes systems; phase velocity; hygro-thermal environment;
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Times Cited By KSCI : 23  (Citation Analysis)
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