Analysis of Nonlinear Vibrations of Slightly Curved Tripled-Walled Carbon Nanotubes Resting on Elastic Foundations in a Magneto-Thermal Environment
محورهای موضوعی : Mechanical EngineeringM.G Sobamowo 1 , J.O Akanmu 2 , O.A Adeleye 3 , A.A Yinusa 4
1 - Department of Mechanical Engineering, University of Lagos, Akoka, Lagos, Nigeria
2 - Department of Civil and Environmental Engineering, University of Lagos, Akoka, Lagos, Nigeria
3 - Department of System Engineering, University of Lagos, Akoka, Lagos, Nigeria
4 - Department of Mechanical Engineering, University of Lagos, Akoka, Lagos, Nigeria
کلید واژه: Multi-walled carbon nanotubes, Nonlocal elastic theory, Magnetic and thermal environment, Winkler and Pasternak foundations, Small-scale effects,
چکیده مقاله :
In this work, nonlocal elasticity theory is applied to analyze nonlinear free vibrations of slightly curved multi-walled carbon nanotubes resting on nonlinear Winkler and Pasternak foundations in a thermal and magnetic environment. With the aid of Galerkin decomposition method, the systems of nonlinear partial differential equations are transformed into systems of nonlinear ordinary differential equations which are solved using homotopy perturbation method. The influences of elastic foundations, magnetic field, temperature rise, interlayer forces, small scale parameter and boundary conditions on the frequency ratio are investigated. It is observed form the results that the frequency ratio for all boundary conditions decreases as the number of walls increases. Also, it is established that the frequency ratio is highest for clamped-simple supported and lowest for clamped-clamped supported. Further investigations on the controlling parameters of the phenomena reveal that the frequency ratio decreases with increase in the value of spring constant (k1) temperature and magnetic field strength. It is hoped that this work will enhance the applications of carbon nanotubes in structural, electrical, mechanical and biological applications especially in a thermal and magnetic environment.
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