Composite FG plates with different internal cutouts: Adaptive IGA buckling analysis without trimmed surfaces

This work is devoted to numerical investigation for buckling of functionally graded plates (FGPs) with internal holes using an efficient adaptive isogeometric analysis (IGA). The locally refined (LR) B-splines, which possess the local refinement ability, are used as basis functions in IGA. Kinematics of plate structures are derived using the simple quasi-3D hyperbolic shear deformation theory (S-Q3HSDT), which has few unknowns, free from shear...