EXPERIMENTAL RESULTS FOR BENDING AND BUCKLING OF RECTANGULAR ORTHOTROPIC FIBER-REINFORCED PLASTIC PLATE STRUCTURES

摘要

Solid unstiffened, sandwich, and hat-stiffened rectangular orthotropic fiber-reinforced plastic(FRP)plates were tested in uniaxial in-plane compression and out-of-plane uniform pressure. The two short edges of all plates were clamped, whereas the two long edges of the unstiffened and sandwich plates were simply supported and the same edges of the hat-stiffened plate were left free. Unstiffened plates reached global buckling at about 688 kN(klb);however, the plates did not collapse up to the machine load limit of 1334 kN (300 klb).Sandwich plates never reached the overall elastic buckling load; they collapsed in local buckling by face sheet delamination and core shear failure at loads of about 939 kN (211 klb).