OS0418 繊維強化複合材料の微視的な弾性定数のばらつきに対するミクロ応力の確率応答解析(先端材料システムの力学とメゾスケールモデリング,オーガナイズドセッション)

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This paper describes a numerical result of stochastic analysis on a random variation of microscopic stress caused by a random variation in a material property of component materials. The stochastic properties such as the expectation, variance or coefficient of variance are computed with the Monte-Carlo simulation. The microscopic stress is analyzed with using the homogenization theory based finite element analysis. As an example, a microscopic stress in a unidirectional fiber reinforced composite under a uni-axial macroscopic strain is taken into account. The macroscopic strain may change caused by a random variation in a material property of a component material, the stochastic characteristic of the microscopic stress under both constant strain and stress conditions are investigated. From numerical results, it is confirmed that the stochastic characteristics of the microscopic stress depend on both a kind of microscopic random variation and macroscopic condition on the strain field.
2009-07-24