Postbuckling analysis of bi-directional functionally graded imperfect beams based on a novel third-order shear deformation theory

In this work, postbuckling response of bi-directional functionally graded (FG) beams with porosities is investigated. The transverse shear deformation is taken into account based on a novel third-order shear deformation theory in which the kinematic of displacements is derived from an elastic formulation. Porosities owing to the technical issue during the preparation of functionally graded materials (FGMs) with even and uneven distributions are...