Advances in nano research

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Static stability analysis of graphene origami-reinforced nanocomposite toroidal shells with various auxetic cores

  • Farzad Ebrahimi (Department of Mechanical Engineering, Faculty of Engineering, Imam Khomeini International University) ;
  • Mohammadhossein Goudarzfallahi (Mechanical Engineering Department, Science and Research branch, Islamic Azad University) ;
  • Ali Alinia Ziazi (Mechanical Engineering Department, Science and Research branch, Islamic Azad University)
  • Received : 2018.12.29
  • Accepted : 2021.05.11
  • Published : 2024.07.25
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Abstract

In this paper, stability analysis of sandwich toroidal shell segments (TSSs) with carbon nanotube (CNT)-reinforced face sheets featuring various types of auxetic cores, surrounded by elastic foundations under radial pressure is presented. Two distinct types of auxetic structures are considered for the core, including re-entrant auxetic structure and graphene origami (GOri)-enabled auxetic structure. The nonlinear stability equilibrium equations of the longitudinally shallow shells are formulated using the von Karman shell theory, in conjunction with Stein and McElman approximation while considering Winkler-Pasternak's elastic foundation to simulate the interaction between the shell and elastic foundation. The Galerkin method is employed to derive the nonlinear stability responses of the shells. The numerical investigations show the influences of various types of auxetic-core layers, CNT-reinforced face sheets, as well as elastic foundation on the stability of sandwich shells.

Keywords

References

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