Journal
COMPOSITE STRUCTURES
Volume 204, Issue -, Pages 301-312Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2018.07.072
Keywords
Buckling; Postbuckling; Graphene nanoplatelets; Functionally graded nanocomposite; Analytical solutions
Categories
Funding
- National Natural Science Foundation of China [51578166]
- Project of Chief Scientist of the Yangcheng Scholar [1201541551]
- Technology Planning Project of Guangdong Province [2016B050501004]
- Postdoctoral Research Funding of Guangzhou [GDBSH2016006]
- Innovation Research for the Postgraduates of Guangzhou University [2017GDJC-D17]
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This paper investigates the in-plane instability of functionally graded multilayer composite shallow arches reinforced with a low content of graphene platelets (GPLs) under a central point load. The GPL weight fraction, which is a constant within each individual GPL reinforced composite (GPLRC) layer, follows a layer-wise variation along the thickness direction. The effective Young' modulus of the GPLRC is estimated by modified Halpin-Tsai micromechanics model. The virtual work principle is used to establish the nonlinear equilibrium equations for the FG-GPLRC arch fixed or pinned at both ends which are then solved analytically. A parametric study is conducted to examine the effects of distribution pattern, weight fraction, and size of GPL nanofillers and the geometrical parameters of the FG-GPLRC arch on its buckling and postbuckling behaviors. The conditions for multiple limit point buckling to occur in an FG-GPLRC pinned arch are also discussed. It is found that GPL nanofillers have a remarkable reinforcing effect on buckling and postbuckling performances of nanocomposite shallow arches.
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