有孔矩形板の剪断塑性坐屈に関する実験的研究

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Recently, it has been reported that the web plates of large ships, especially with a hole, are damaged by shear buckling. For the ratio of the Thickness to the breadth which is as usual in actual ships, buckling will occur within the plastic range. So, the authors have reserched experimentally the effect of the ratio of hole diameter to the plate dimention, the aspect ratio, the existence of weld joints and the method of stiffening for the pierced parts, on the plastic buckling strength using simple square plates. The conclusions are as follows; 1) The effect of aspect ratio, the ratio of hole diameter to the plate dimention, is represented by the following empirical farmula, τ_<cr>=τ_<cr1>[1-(-0.06β+1.09)D/S][-0.24β+1.24] where, β: aspect ratio D/S: hole diameter/breadth of plate τ_<cr1>: shear buckling stress of plate (β=1.0, D/S=0.0) τ_<cr>: shear buckling stress of any pierced plates. with the limitation {1.0≦β≦2.11 0.0≦D/S≦0.5 0.0128≦t/s≦0.0170 2) Approximate caluculation based on the stowell's theory verified the above mentioned empirical formula. 3) Strength of the plate with truck type perforation can be argued by the longer diameter. 4) Shear buckling strength of the model specimen composed of stiffener, double bottom plats is higher than the strength of simple plates. 5) The ratio of reduction of shear buckling strength due to existance of slot, weld joint are as follows; slot 10〜20%, butt joint: about 30% lap joint about 30%, lap joint in stiffening side about 6%. 6) As for the stiffening method, stiffener type is better than the ring type.
社団法人日本船舶海洋工学会の論文
1967-02-28

有孔矩形板の剪断塑性坐屈に関する実験的研究

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