軸圧縮荷重を受ける繊維複合材料サンドイッチ平板の最適設計 : アスペクト比が1より大きい場合(<小特集>強化プラスチックス小特集)

概要

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In the previous paper, one of the present authors proposed an analytical method useful for designing optimum fibrous laminated sandwich plates which can stand a given axial compressive load. The plate aspect ratio,however,was assumed to be less than unity in the previous study. This paper deals with the case where the aspect ratio of the sandwich plate is greater than unity. The previously proposed optimum design method,the Boundary Slope Method,is generally valid when the aspect ratio is greater than unity,but it is found to be not valid when the aspect ratio approaches to such values as 1.5,2.5,3.5,and so on. The reason is that the actual half number of bucking is always different from the assumed half number in such a range of aspect ratio. For instance,when the aspect ratio is near 1.5,the actual half wave number of the laminate which is optimized by assuming that the half wave number is one, becomes two,and the converse is also true. So, another new optimum design method in such a range of aspect ratio is proposed in this paper. The basic idea of the method is that the fiber orientation angles are determined so as that the bucking stress dose not change even if the bucking mode changes. This design criterion is in the range of critical aspect ratio where the former design method is not valid.
社団法人日本材料学会の論文
1986-05-15