• 文献标题:   Dynamic buckling of rotationally restrained FG porous arches reinforced with graphene nanoplatelets under a uniform step load
  • 文献类型:   Article
  • 作  者:   YANG ZC, WU D, YANG J, LAI SK, LV JE, LIU AR, FU JY
  • 作者关键词:   limit point dynamic buckling, bifurcation dynamic buckling, functionally graded porous arch, graphene platelet, uniform step loading, analytical solution
  • 出版物名称:   THINWALLED STRUCTURES
  • ISSN:   0263-8231 EI 1879-3223
  • 通讯作者地址:  
  • 被引频次:   42
  • DOI:   10.1016/j.tws.2021.108103 EA JUN 2021
  • 出版年:   2021

▎ 摘  要

This paper presents a dynamic buckling analysis for a rotationally restrained functionally graded (FG) graphene nanoplatelets (GPLs) reinforced composite (FG-GPLRC) porous arch under a uniform step load where GPL nanofillers are uniformly dispersed while the porosity coefficient varies along the thickness direction of the arch. The effective material properties of the FG-GPLRC porous arch are determined by the volume fraction distribution of materials. Analytical solutions for the symmetric limit point dynamic buckling and anti-symmetric bifurcation dynamic buckling loads of rotationally restrained FG-GPLRC porous arches are derived by using an energy-based approach. Critical geometric parameters that determine the dynamic buckling mode switching behavior are also identified and discussed. Depending on the geometric parameters and the rotational restraint stiffness, the FG-GPLRC porous arch can buckle in either a symmetric limit point mode or an anti-symmetric bifurcation mode dynamically. It is also found that the dynamic buckling load of the arch can be considerably improved by adding a small amount of GPLs as reinforcing nanofillers. The influences of the porosity coefficients, GPL weight fractions, arch dimensions and geometries on the dynamic buckling behavior of rotationally restrained FG-GPLRC porous arches are comprehensively investigated through extensive parametric studies.