نوع مقاله : مکانیک جامدات
نویسندگان
1 دانشگاه رازی- دانشکده فنی مهندسی - گروه مهندسی مکانیک
2 کرمانشاه دانشگاه رازی
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In this paper an analytical model is presented to investigate the dynamic response of the nano-curved plate under impact loading of nanoparticles. Unlike the macroscale, long-range interatomic interactions, such as the Van der Waals (vdW) force, are considered at the nanoscales. The impact load on the nano- curved plate is considered as an interaction between the nanoparticle and the nano-plate. The vdW force between the carbon nanoparticle and silicon nano-curved plate is determined by the Lennard-Jones potential. The Love-Kirchhoff plate theory and Double Fourier series are used for determining the displacement field of the nano-plate. Also the governing equations of the nano-curved plate are derived by considering the residual surface stress, Gurtin and Murdoch relations and Hamilton's principle and are solved for a simply supported nano-curved plate by using the Rung-Kutta’s fourth order method in MATLAB. The analytical model results are validated with an analytical model that has investigated the dynamic response of the nanoparticle impact on a rectangular nano-plate. The effects of geometrical parameters such as curvature, thickness, mass and velocity are investigated. Also the surface effects of the nano-plate on the vdW force and the dynamic response of the nano-curved plate are studied. The results show that by increasing the radius of curvature, the maximum deformation at a constant curvature angle is decreased. Also, by considering the surface effect, the maximum displacement of the center of the nano-plate is reduced and the role of the surface effect on the maximum deflection of the nano-plate decreases with increasing nano-plate thickness.
کلیدواژهها [English]
10. Sun, W. F., Zeng, Q. H., Yu, A. B., and Kendall, K. “Calculation of Normal Contact Forces between Silica Nanospheres”, Langmuir, Vol. 29, No. 7, pp. 825–37, 2013.##
11. Liu, H., Liu, J., Yang, J. L., and Feng, X. Q. “Low velocity impact of a nanoparticle on a rectangular nanoplate: A theoretical study”, Int. J. Mech. Sci., Vol. 123 , pp. 253–259, 2017.##
12. Feng, X. Q., Li, H., Zhao, H. P., and Yu, S. W. “Numerical simulations of the normal impact of adhesive microparticles with a rigid substrate”, Powder Technol, Vol. 189, pp. 34–41, 2009.##
13. Yang, M. J., Qiao, P. Z. “Nonlinear impact analysis of fully backed composite sandwich structures”, Compos. Sci. Technol, Vol. 65 , No. 3-4, pp. 551–562, 2005.##
14. Zhao, D. M., Liu, J. L., Wang, L. “Nonlinear free vibration of a cantilever nanobeam with surface effects: semi-analytical solutions”, Int. J. Mech. Sci., Vol. 113, pp. 184–195, 2016.##
15. Gurtin, M. E., and Murdoch, A. I. “A continuum theory of elastic material surfaces”, Arch Ratio Mech Anal, Vol. 57, pp. 291–323, 1975.##
16. Reddy, J. N. “Energy principles and variational methods in applied mechanics”, second ed, John Wiley & Sons, New Jersy, 2002.##