Journal of Theoretical
and Applied Mechanics
51, 1, pp. 15-24, Warsaw 2013
Strength and buckling of sandwich beams with corrugated core
The subject of the paper is a sandwich beam with a crosswise or lengthwise corrugated core. The beam is made of an aluminium alloy. The plane faces and the corrugated core are glued together. Geometrical properties and rigidities of the beams are described. The load cases investigated in the work are pure bending and axial compression. The relationship between the applied bending moment and the deflection of the beam under four-point bending is discussed. The analytical and numerical (FEM) calculations as well as experimental results are described and compared. Moreover, for the axial compression, the elastic global buckling problem of the analysed beams is presented. The critical loads for the beams with the crosswise and lengthwise corrugated core are determined. The comparison of the analytical and FEM results is shown.
Keywords: sandwich beam; corrugated core; strength; elastic buckling; deflection