Khalfi1, YSallai2, BBellebna, Y2023-05-302023-05-302022-01-01Y. Khalfi1,*, B. Sallai2 and Y. Bellebna,BUCKLING ANALYSIS OF PLATES USING AN EFFICIENT SINUSOIDAL SHEAR DEFORMATION THEORY . Journal of Fundamental and sciences. vol.14, no 1. January 2022. Faculty of exact sciences. university of el oued. [visited in 01/01/2022]. available from [khalfi26yassine@yahoo.fr]http://dspace.univ-eloued.dz/handle/123456789/25099articleMechanical buckling response of isotropic and orthotropic plates using the two variable refined plate theory is presented in this paper. The theory takes account of transverse shear effects and parabolic distribution of the transverse shear strains through the thickness of the plate; hence it is unnecessary to use shear correction factors. Governing equations are derived from the principle of virtual displacements. The nonlinear strain-displacement of Von Karman relations are also taken into consideration. The closed-form solution of a simply supported rectangular plate subjected to in-plane loading has been obtained by using the Navier method. Numerical results are presented for the present efficient sinusoidal shear deformation theory, demonstrating its importance and accuracy in comparison to other theories.enBuckling analysis; Refined plate theory; The nonlinear strain-displacement of Von Karman relations; Isotropic plate; Orthotropic plate; Navier methodArticle