境界要素法によるナノ超微粒子分散複合材料の力学的挙動に関する基礎的研究

概要

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Materials with ultrafine microstructures often display novel and improved properties compared to bulk. lt is known that composite materials containing nano fine particles do not obey the conventional rule of mixtures of mechanical properties. This paper presents how the mechanical properties for nanocomposite materials are estimated using the boundary element method (BEM). A model of a material, which is a spherical fine particle with transversely isotropic property embedded in an isotropic bulk materials, is considered for the present analysis. In particular, interfacial stresses originating from interfacial energy are considered as boundary conditions at the interface of particle and bulk. The model is analyzed by a multizone boundary element method, and the composite Young's modulus using the conventional rule of mixtures is compared with an apparent Young's modulus obtained from the analysis with surface stress on the interface. It was found that the apparent Young's modulus increases with decrease in particle size and the stress distribution in the particle is not uniform.
一般社団法人日本機械学会の論文
1996-08-25