217 曲線状繊維によって強化された複合材の多目的最適化

概要

論文の詳細を見る
The present study proposes a multi-objective optimization method to progress the mechanical property and minimizing the production cost for the fibrous composite plate with curvilinear fibers. The production cost is represented by the average curvature of the curvilinear fibers. Curvilinear fiber shapes are defined by the projections of contour lines for a cubic polynomial surface, and design variables are defined by the coefficients of the polynomial. Stresses and fundamental frequencies of the plate are calculated by a finite element code with isoparametric 8-node rectangular elements. An improved non-dominated sorting genetic algorithm (NSGA-II) based on the non-dominated sorting and crowded distance metric sorting is used as an optimizer with a mutation whose probability is controlled to maintain the variety of individuals and to keep searching ability strong. The numerical results showed that the present optimization method resulted in the widely distributed Pareto-optimum front ranging from parallel fibers to largely curved fibers.
一般社団法人日本機械学会の論文
2011-09-05