International Journal of Aeronautical and Space Sciences

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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An Approximate Method for the Buckling Analysis of a Composite Lattice Rectangular Plate

  • Kim, Yongha (Graduate School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Kim, Pyunghwa (Graduate School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Kim, Hiyeop (Graduate School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Park, Jungsun (Department of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • Received : 2017.04.24
  • Accepted : 2017.09.11
  • Published : 2017.09.30
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Abstract

This paper defines the modified effective membrane stiffness, bending stiffness considering the directionally dependent mechanical properties and mode shape function of a composite lattice rectangular plate, which is assumed to be a Kirchhoff-Love plate. It subsequently presents an approximate method of conducting a buckling analysis of the composite lattice rectangular plate with various boundary conditions under uniform compression using the Ritz method. This method considers the coupled buckling mode as well as the global and local buckling modes. The validity of the present method is verified by comparing the results of the finite element analysis. In addition, this paper performs a parametric analysis to investigate the effects of the design parameters on the critical load and buckling mode shape of the composite lattice rectangular plate based on the present method. The results allow a database to be obtained on the buckling characteristics of composite lattice rectangular plates. Consequently, it is concluded that the present method which facilitates the calculation of the critical load and buckling mode shape according to the design parameters as well as the parametric analysis are very useful not only because of their structural design but also because of the buckling analysis of composite lattice structures.

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