TY - JOUR
T1 - Dynamic buckling of rotationally restrained FG porous arches reinforced with graphene nanoplatelets under a uniform step load
AU - Yang, Zhicheng
AU - Wu, Di
AU - Yang, Jie
AU - Lai, Siu Kai
AU - Lv, Jiangen
AU - Liu, Airong
AU - Fu, Jiyang
N1 - Funding Information:
This research is financially supported by the National Natural Science Foundation of China (Nos. 51925802 , 11972123 , 51878188 ), Technology Planning Project of Guangdong Province, China (No. 2020A1414010319 ), China-Australia Joint Research Centre for Resilient Material and Structures (No. 2020A050519002 ), the Research Grants Council of Hong Kong through the General Research Fund, China (Project No. PolyU 152008/19E ) and the Research Impact Fund, Australia (Project No. R5020-18 ), and the Australian Research Council Discovery Projects ( DP210103656 ). The authors are grateful for these supports.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/9
Y1 - 2021/9
N2 - 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.
AB - 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.
KW - Analytical solutions
KW - Bifurcation dynamic buckling
KW - Functionally graded porous arch
KW - Graphene platelets
KW - Limit point dynamic buckling
KW - Uniform step loading
UR - http://www.scopus.com/inward/record.url?scp=85108254417&partnerID=8YFLogxK
U2 - 10.1016/j.tws.2021.108103
DO - 10.1016/j.tws.2021.108103
M3 - Journal article
AN - SCOPUS:85108254417
SN - 0263-8231
VL - 166
JO - Thin-Walled Structures
JF - Thin-Walled Structures
M1 - 108103
ER -