二軸圧縮負荷を受ける有円孔 FRP 平板の座屈強度

概要

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The thin plates structure has often opening for lightweight and some other necessities. Therefore, buckling behavior of Fiber Reinforced Plastics (FRP) plate with a centrally located circular hole is a important problem for the lightweight structure. In the present study, the buckling analysis of a thin plate is treated which is made of the cross-ply infinite laminates and unidirectional fiber oriented rectangular construction with a hole, and is subjected to uniaxial and biaxial compression. Carbon-fiber/epoxy (CFRP) plates are mainly used in analysis. Finite Element methode are used for the analysis of buckling and deformative mode. In both cross-ply laminates and unidirectional fiber oriented plates, the buckling load relates obviously to cut-out dimensions. That is, as cut-out dimension becomes large, the buckling load decreases gradually. It is also observed that the compressive load from x-direction (longitudinal axis subjected to loading) is more effective comparison to transverse load to x-direction. Deformative mode appear more easily in the plate of unidirectional fiber oriented θ=0゜ and θ=90゜, than that of θ=0゜. As for the effect of the buckling load reduction of the plate which has a centrally located circular hole against non-hole, the strong anisotropic material, that is CFRP, is bigger than the others.
東海大学の論文