Nonlinear thermal dynamic buckling and global optimization of smart sandwich plate with porous homogeneous core and carbon nanotube reinforced nanocomposite layers

作     者：Dat, Ngo Dinh Quan, Tran Quoc Duc, Nguyen Dinh 

作者机构：Phenikaa Univ Phenikaa Inst Adv Study PIAS Hanoi 12116 Vietnam Phenikaa Univ Fac Mech Engn & Mechatron Hanoi 12116 Vietnam Univ Engn & Technol Dept Engn & Technol Construct & Transportat VNU Hanoi 144 Xuan Thuy Hanoi Vietnam 

出 版 物：《EUROPEAN JOURNAL OF MECHANICS A-SOLIDS》 (欧洲力学杂志；A:固体力学)

年 卷 期：2021年第90卷

页      面：104351-104351页

核心收录：

学科分类：08[工学] 080101[工学-一般力学与力学基础] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Vietnam National Foundation for Science and Technology Development (NAFOSTED) [107.02-2019.01] 

主　　题：Nonlinear thermal dynamic buckling Global optimization Smart sandwich plate Carbon nanotube reinforced nanocomposite Bees algorithm 

摘      要：The analytical investigation for the nonlinear thermal dynamic buckling of smart sandwich plate subjected to mechanical, thermal and electric loadings is presented. The sandwich plate is composed of a porous homogeneous core, two carbon nanotube reinforced composite (CNTRC) layers and two piezoelectric face sheets. Basic equations are derived based on the Reddy s higher order shear deformation plate theory and Hamilton s principle in which the initial imperfection and Pasternak-type elastic foundations are included. The external pressure is assumed to be uniformly distributed on the surface of the sandwich plate and depend on time according to the linear functions. The nonlinear dynamic response, the frequency - amplitude relation are obtained by using the Galerkin and Runge - Kutta methods and the critical dynamic buckling load is determined by using Budiansky - Roth criterion. Bees Algorithm is used to determine the maximum value of natural frequency of smart sandwich plate and the corresponding optimum values of geometrical and material parameters. The effects of geometrical parameters, CNT volume fraction, elastic foundations, temperature increment, initial imperfection and porosity coefficient on the nonlinear vibration and dynamic buckling of the smart sandwich plate are considered specifically. The numerical results are also compared with existing results using different theories.