期刊
MECHANICS OF MATERIALS
卷 148, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mechmat.2020.103532
关键词
Stress-driven integral elasticity; Actuated hybrid nanotube; Nonlinear vibrations; Maximum deflections; Magnetic field; Thermal environment
资金
- Research Council of Shahid Chamran University of Ahvaz
- Ministry of Science and Higher Education, Poland [W/WM-IIM/3/2020]
In the present paper, the effects of material properties, nonlocal parameter, Lorentz and electric forces on maximum static deflections and natural frequencies of actuated hybrid carbon/boron-nitride nanotubes (CBNNT) subjected to thermal loads are studied for the first time. The displacement field of the nanotube satisfies assumptions of the Bernoulli-Euler beam theory. The Green-Lagrange small strains and moderate rotations for geometric nonlinearity of the nanotube are taken into consideration. Two nonlinear governing equations of motion for carbon and boron-nitride parts of the clamped nanotube are derived using the d'Alembert principle and the stress-driven nonlocal integral elasticity theory. Solution to the formulated nonlinear boundary value problem was obtained using the Galerkin modal expansion method. Validation of obtained results and parametric study are comprehensively presented. Obtained results show effect of variation of temperature, nonlocal parameter, ratio of length of carbon and boron-nitride components, direct current (DC) and alternating current (AC) voltages on shifting of the fundamental frequency and maximum deflection of hybrid nanotube.
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