Steel and Composite Structures

  • 제48권3호
  • /
  • Pages.275-291
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  • 2023
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Free vibration analysis of a laminated trapezoidal plate with GrF-PMC core and wavy CNT-reinforced face sheets

  • Yingqun Zhang (School of Architecture and Engineering, Weifang Engineering Vocational College) ;
  • Qian Zhao (School of Architecture and Engineering, Weifang Engineering Vocational College) ;
  • Qi Han (School of Architecture and Engineering, Weifang Engineering Vocational College) ;
  • N. Bohlooli (School of Civil Engineering, Urmia University)
  • 투고 : 2022.11.30
  • 심사 : 2023.07.26
  • 발행 : 2023.08.10
⟨ 이전 논문 다음 논문 ⟩

초록

This paper has focused on presenting vibration analysis of trapezoidal sandwich plates with 3D-graphene foam reinforced polymer matrix composites (GrF-PMC) core and FG wavy CNT-reinforced face sheets. The porous graphene foam possessing 3D scaffold structures has been introduced into polymers for enhancing the overall stiffness of the composite structure. Also, 3D graphene foams can distribute uniformly or non-uniformly in the plate thickness direction. The effective Young's modulus, mass density and Poisson's ratio are predicted by the 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 First-order shear deformation theory of plate is utilized to establish governing partial differential equations and boundary conditions for trapezoidal plate. The governing equations together with related boundary conditions are discretized using a mapping-generalized differential quadrature (GDQ) method in spatial domain. Then natural frequencies of the trapezoidal sandwich plates are obtained using GDQ method. Validity of the current study is evaluated by comparing its numerical results with those available in the literature. It is explicated that 3D-GrF skeleton type and weight fraction, carbon nanotubes (CNTs) waviness and CNT aspect ratio can significantly affect the vibrational behavior of the sandwich structure. The plate's normalized natural frequency decreased and the straight carbon nanotube (w=0) reached the highest frequency by increasing the values of the waviness index (w).

키워드

과제정보

Supported by Key Project of Vocational Education Teaching Reform Research in Shandong Province: Research and Practice on the Segmented Training Model of Building Engineering Technology Majors Based on the "Post Course Competition Certificate"(NO.2022050).

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