AN AVERAGING METHOD OF ELASTOPLASTIC BEHAVIOR OF COMPOSITES AND POLYCRYSTALLINE METALS

複合材料等の非均質材料の巨視的挙動の解析的な予測法に，森・田中理論に基づいた手法やHashin-Shtrikmanの上下界手法等があり，微視的な幾何条件とつり合いが考慮されている．著者らは弾性の場合に，古典的手法から上述の手法を包含し，かつさらに応用できる予測法を提案した．それは森・田中の考え方を3相材料に適用した上で，母材の体積比率を零にすることによって得られる2 相材料の予測手法で，従来の手法よりも実験値をより精度良く予測し，またHillのself-consistent解と同じ予測特性を持つことが明らかにされてきた．ここではその手法を弾塑性体に適用し，一般的な載荷状態で最適な母材の材料パラメータを選択する方法を提案する．そして，その予測結果を既存の実験値や他の解析結果等と比較し，精度と有用性を検討する．

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