Engineering and Technology Journal

Single Variable Thick Plate Buckling Problems Using Double Finite Sine Transform Method

Document Type : Research Paper

Author

Civil Engineering Dept., Enugu State University of Science and Technology, Agbani, Enugu State, Nigeria.

Abstract

This paper derives buckling solutions for single variable thick plate buckling problems using the double finite sine transform method (DFSTM). The problem governing partial differential equation (GPDE), originally formulated by Shimpi and others, uses a refined plate theory (RPT) and accounts for transverse shear deformations, rendering it applicable to thick plates. The thick plate is simply supported and subjected to (i) uniform uniaxial compressive load in the x direction. (ii) uniform biaxial compressive load in the x and y axes. The DFSTM was applied to the GPDE, and the problem transformed into an algebraic equation, which was simpler in this case due to the Dirichlet boundary conditions satisfied by the sinusoidal kernel of the DFSTM. Analytical buckling solutions were determined for the two considered cases of uniaxial and biaxial compressive loads in terms of the buckling modes, Poisson’s ratio (m), and thickness (h) to least dimension (a) ratio. Critical buckling loads (Pcr) determined at the first buckling modes agreed with previously obtained Navier solutions for Mindlin, Reddy, and Refined plates. Pcr calculated for ratios of h/a equal to 0.01 converged to the solutions obtained using Kirchhoff-Love plate theory (KLPT), illustrating the applicability of the GPDE to thin and thin plate buckling.

Graphical Abstract

Highlights

  • The double finite sine transform method was utilized to obtain exact buckling solutions for thick plate problems
  • The method simplified the problem to algebraic ones since the sinusoidal function satisfies the boundary conditions
  • The buckling solutions aligned with exact solutions for thick plates

Keywords

Main Subjects

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Engineering and Technology Journal
Volume 41, Issue 11
Civil Engineering
November 2023
Page 1403-1413
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