Nonlocal effect on the axisymmetric nonlinear vibrational response of nano-disks using variational iteration method | ||
| Journal of Computational Applied Mechanics | ||
| دوره 52، شماره 3، آذر 2021، صفحه 507-534 اصل مقاله (1.82 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/jcamech.2021.305561.525 | ||
| نویسندگان | ||
| Mojtaba Shariati1؛ Mohammad Shishesaz* 1؛ Reza Mosalmani1؛ Seyed Alireza Seyed Roknizadeh1؛ Mohammad Hosseini2 | ||
| 1Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran | ||
| 2Department of Mechanical Engineering, University of Hormozgan, Bandar Abbas, Iran | ||
| چکیده | ||
| In this study, the nonlinear free vibration of a nano-disk considering small scale effects has been investigated by using the nonlocal elasticity. To take into account the nonlinear geometric effects, the nonlinear model of von Karman strain has been used while the governing differential equation was extracted according to Hamilton principle. The Galerkin weighted residual method in conjunction with the variational iteration method (VIM) was introduced to solve the governing equations for simply supported and clamped edge boundary conditions. For further comparison, the nonlinear equation was solved using the fourth-order Runge-Kutta method. Very good agreements were observed between the results of both methods, while the former method made the solution much easier. Additionally, it was observed that the ratio of thickness to radius, h/R, plays an important role on the nonlinear frequencies. This effect appears to be minute if the local elasticity theory is adopted. However, results indicated that the nonlocal effect may be ignored provided h/R ratio is very small. | ||
| کلیدواژهها | ||
| Nonlinear free vibration؛ nano-disks؛ Nonlocal elasticity Theory؛ Von Karman strain | ||
| مراجع | ||
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