%0 Journal Article
%@ 0263-8231
%A Nguyen, Dinh Duc
%A Pham, Dinh Nguyen
%A Nguyen, Dinh Khoa
%D 2017
%F SisLab:2813
%I Elsevier
%J Thin-Walled Structures
%P 178-189
%T Nonlinear dynamic analysis and vibration of eccentrically stiffened S-FGM elliptical cylindrical shells surrounded on elastic foundations in thermal  environments
%U https://eprints.uet.vnu.edu.vn/eprints/id/eprint/2813/
%V 117
%X Elliptical cylindrical shell is one of shells with special shape. Up to date, there is no publication on vibration and dynamic of functionally graded elliptical cylindrical shells. Therefore, the purpose of the present study is to  investigate the nonlinear dynamic response and vibration of imperfect eccentrically stiffness functionally graded  elliptical cylindrical shells on elastic foundations using both the classical shell theory (CST) and Airy stress  functions method with motion equations using Volmir's assumption. The material properties are assumed to be  temperature - dependent and graded in the thickness direction according to a Sigmoid power law distribution (S  FGM). The S-FGM elliptical cylindrical shell with metal-ceramic-metal layers are reinforced by outside metal  stiffeners. Both the S-FGM elliptical shell and metal stiffeners are assumed to be in thermal environment and  both of them are deformed under temperature simultaneously. Two cases of thermal loading (uniform  temperature rise and temperature variation through thickness) are considered. The nonlinear motion equations  are solved by Galerkin method and Runge-Kutta method (nonlinear dynamic response, natural frequencies). The  effects of geometrical parameters, material properties, elastic foundations Winkler and Pasternak, the nonlinear  dynamic analysis and nonlinear vibration of the elliptical cylindrical shells are studied. The some obtained  results are validated by comparing with those in the literature.