J1010202 Multi-objective Optimization of Productivity and Dynamics Strength of Fibrous Composite with Curvilinear Fibers

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  • J1010202 曲線状強化繊維を有する複合材の生産性と力学強度に関する多目的最適化

Abstract

The present study proposes a multi-objective optimization method of productivity and dynamic strength for the fibrous composite plate with curvilinear fibers. The fibrous composites have some problems in the practical application to structures. The productivity decreases and fiber density becomes nonuniform with increase in the maximum curvature of curvilinear fibers. Therefore, the relationships between the productivity and curvature are formulated by the experimental results and a practical optimum curvilinear fiber shapes are searched. Curvilinear fiber shapes are defined by the coefficients of the cubic polynomial function. Because principal strains are important in design of aircraft main wings, principal strains of the plate are calculated by the finite element method with eight-node quadrilateral isoparametric element. An Optimized Multi-Objective Particle Swarm Optimization (OMOPSO) based on the non-dominated sorting and crowded distance metric sorting is employed as an optimizer with an inertia weight controlled by the auto-tuning method. The numerical results showed that the present optimization considering the relationships between the density and curvature resulted in the more practical solutions than the previous solutions.

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