傾斜機能シンタクチックフォームの機械的特性分布評価

概要

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We investigated mechanical properties in functionally graded syntactic foams which have graded distribution of Acrylonitrile hollow particles (micro-balloons) in epoxy resin matrix. In order to control the distributions of the mechanical properties, the density distributions in the foams were graded by floating phenomenon of the micro-balloons in the matrix resin during the curing process. The dynamic viscoelastic measurements and static compression tests were conducted to evaluate local mechanical properties of the functionally graded syntactic foams. Dynamic viscoelastic measurements revealed that the thermo-viscoelastic properties of the fabricated foams were determined by the properties of the epoxy matrix resin. The static compression test provided relations between the mechanical properties (the compressive Young's modulus and yield stress) and the density in the functionally graded syntactic foams. Consequently, the distributions of the mechanical properties in the functionally graded syntactic foams were identified from the density distribution.