文献类型：期刊文献

英文题名：Vibration analysis of sandwich sector plate with porous core and functionally graded wavy carbon nanotube-reinforced layers

作者：Feng, Hongwei[1];Shen, Daoming[1];Tahouneh, Vahid[2]

第一作者：冯红卫

通讯作者：Feng, HW[1];Tahouneh, V[2]

机构：[1]Xinxiang Univ, Sch Civil Engn & Architecture, Xinxiang 453000, Henan, Peoples R China;[2]Islamic Azad Univ, Islamshahr Branch, Young Researchers & Elite Club, Islamshahr, Iran

第一机构：新乡学院土木工程与建筑学院

通讯机构：[1]corresponding author), Xinxiang Univ, Sch Civil Engn & Architecture, Xinxiang 453000, Henan, Peoples R China;[2]corresponding author), Islamic Azad Univ, Islamshahr Branch, Young Researchers & Elite Club, Islamshahr, Iran.|[1107114]新乡学院土木工程与建筑学院;[11071]新乡学院;

年份：2020

卷号：37

期号：6

起止页码：711-731

外文期刊名：STEEL AND COMPOSITE STRUCTURES

收录：;EI(收录号：20205209685347);Scopus(收录号：2-s2.0-85098054485);WOS:【SCI-EXPANDED(收录号:WOS:000608440200006)】；

语种：英文

外文关键词：CNTs waviness and aspect ratio; sandwich sectorial plates; vibration; rule of mixture; two-parameter elastic foundations; Graphene Platelets (GPLs); 2D-Generalized Differential Quadrature Method (GDQM)

摘要：This paper deals with free vibration of FG sandwich annular sector plates on Pastemak elastic foundation with different boundary conditions, based on the three-dimensional theory of elasticity. The plates with simply supported radial edges and arbitrary boundary conditions on their circular edges are considered. The influence of carbon nanotubes (CNTs) waviness, aspect ratio, internal pores and graphene platelets (GPLs) on the vibrational behavior of functionally graded nanocomposite sandwich plates is investigated in this research work. The distributions of CNTs are considered functionally graded (FG) or uniform along the thickness of upper and bottom layers of the sandwich sectorial plates and their mechanical properties are estimated by an extended rule of mixture. In this study, the classical theory concerning the mechanical efficiency of a matrix embedding finite length fibers has been modified by introducing the tube-to-tube random contact, which explicitly accounts for the progressive reduction of the tubes' effective aspect ratio as the filler content increases. The core of structure is porous and the internal pores and graphene platelets (GPLs) are distributed in the matrix of core either uniformly or non-uniformly according to three different patterns. The elastic properties of the nanocomposite are obtained by employing Halpin-Tsai micromechanics model. A semi-analytic approach composed of 2D-Generalized Differential Quadrature Method (2D-GDQM) and series solution is adopted to solve the equations of motion. The fast rate of convergence and accuracy of the method are investigated through the different solved examples. Some new results for the natural frequencies of the plate are prepared, which include the effects of elastic coefficients of foundation, boundary conditions, material and geometrical parameters. The new results can be used as benchmark solutions for future researches.