最適な短繊維分布による複合材積層板の固有振動数最大化(<特集>D & D 2007)

概要

論文の詳細を見る
A new design method of functional fiber reinforced plastics (FRP) which imitate micro structures of natural materials such as bones and shells is proposed in this work. The material has local anisotropy induced by optimally distributed short fibers which are defined in each element of the finite element method. To design such locally anisotropic thin plates, the present optimum design method combines a genetic algorithm method (GA) with layerwise optimization (LO) concept. The LO concept reduces multi-layer optimization into iterations of single-layer optimizations and the GA is used for a single-layer optimization to decide the fiber orientation angle in each element. The lowest natural frequency of the plates is chosen as an objective function to be maximized and it is found out that the present plates always give higher natural frequencies than conventional plates which are reinforced by parallel straight fibers. Moreover, it is revealed that optimally distributed short fibers tend to be allocated with certain tendency.
一般社団法人日本機械学会の論文
2008-05-25