1202 非線形特性を実現する材料構造設計の試み(GS-12 設計工学(1))

概要

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Material with a periodic microstructure has been studied recently. Although the linear elasticity is the basic assumption in many design problems, the nonlinear elastic properties is an attractive chracteristics to be designed. This article discusses a structural design of nonlinear elastic property that depends on the magnitude of macroscopic stress. The effective properties of the material with microstructure are evaluted by using the homogenization method. An internal boundary is introduced as a switching mechanism of the elastic properties. The minimum volume design is formulated as a topology design problem under the constraints of variable elastic properties and specified switching magnitude of macroscopic stress. A numerial case study showed that the proposed problem works effectively.
2000-03-16