Dynamic behavior of triple-walled carbon nanotubes conveying fluid |
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Authors: | Y Yan XQ He LX Zhang CM Wang |
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Institution: | 1. Department of Engineering Mechanics, Kunming University of Science and Technology, Kunming 650051, Yunnan, China;2. Department of Building and Construction, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong;3. Engineering Science Programme and Department of Civil Engineering, National University of Singapore, Kent Ridge, Singapore 119260, Singapore |
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Abstract: | In this study, the instability of triple-walled carbon nanotubes (TWCNTs) conveying fluid is studied based on an Euler–Bernoulli beam model. The van der Waals (vdW) interactions between different carbon nanotubes (CNTs) are taken into account in the analysis, and the Galerkin discretization approach is used to solve the coupled equations of the motions. Numerical simulations show that the interlayer vdW interactions play a significant role in the natural frequencies and the stability of TWCNTs. The critical flow velocities—associated with divergence, restabilization and flutter—are determined. The effects of different inner radius and the value of mode N used in Galerkin discretization on the dynamical behaviors of the fluid-conveyed TWCNTs are also examined in detail. Results reveal that the internal moving fluid plays an important role in the instability of TWCNTs. |
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