Theory and Experiments of Local Buckling in CFRP Sandwich Panels

摘要

An alternative new CFRP (carbon fiver reinforced polymer) sandwich structures have been studied in this paper. The sandwich structure elements are composed of two CFRP faces, a foam core and some latticed GFRP (glass fiver reinforced polymer) ribs. The sandwich structure elements can exhibit local buckling under bending or compression. This paper presents an analytical solution to the local buckling problem of sandwich panels with latticed ribs. The effect of the three-dimensional interaction between the face and the core on the local buckling criteria is considered. The local buckling stress is given from the stationary theorem of the total potential energy. On the other hand, the flat rectangular sandwich panels were tested in edgewise compression and under four points bending. The good agreement between the presented theory and the experiments for the buckling stress and wavelength is shown.