Analysis of biaxially stressed laminated composite porous plate

In the present research, uniaxial and biaxial critical buckling analysis of laminated porous composite plate was analysed by improved third-order shear deformation theory. The free surface at the top and bottom is ensured by zero transverse shear stress at the top and bottom of the plate. The various porosity distributions were introduced in the whole thickness of the plate. A 2D finite element model of the present mathematical model was developed to analyse the uniaxial and biaxial stressed behaviour of the porous plate. Imposed transverse shear stress continuity of individual layers, improved third-order theory gives better results for the porous plate compared to first-, second-, and third-order deformation theory. An in-house code using FORTRAN is developed by the authors. The effects of different modulus ratios, thickness ratios, fibre orientation angles, and material properties were investigated under uniaxial and biaxial compression of the laminated porous plate. The validation result is in good agreement with the literature. The convergence study is also done for the applicability and reliability of the model and hence the results using different numerical examples.