2018 Fiscal Year Final Research Report

Topology optimization of metallic polycrystalline microstructure to improve strength and deformability

Research Project

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Project/Area Number	16H04394
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Research Field	Structural engineering/Earthquake engineering/Maintenance management engineering
Research Institution	Nagoya University (2018) Tohoku University (2016-2017)
Principal Investigator	Kato Junji 名古屋大学, 工学研究科, 教授 (00594087)
Co-Investigator(Kenkyū-buntansha)	高瀬慎介八戸工業大学, 大学院工学研究科, 講師 (00748808) 高木知弘京都工芸繊維大学, 機械工学系, 教授 (50294260) 京谷孝史東北大学, 工学研究科, 教授 (00186347) 寺田賢二郎東北大学, 災害科学国際研究所, 教授 (40282678) 吉見享祐東北大学, 工学研究科, 教授 (80230803)
Project Period (FY)	2016-04-01 – 2019-03-31
Keywords	トポロジー最適化 / 結晶性材料
Outline of Final Research Achievements	Ductility is the most important mechanical characteristic for metallic materials and has co-relation with the strength and deformability. Those performances are determined by the microstructure, namely crystalline structure. In the meanwhile, it is well known that topology optimization is a powerful design tool to maximize the mechanical performance of structures/materials by applying computers. The present study developed a material design method to maximize the mechanical performance of polycrystalline microstructure, such as stiffness, ductility and thermal conductivity, and verified its usefulness by a series of numerical examples.
Free Research Field	計算力学
Academic Significance and Societal Importance of the Research Achievements	金属材料をはじめとする結晶材料は社会インフラを構成する基盤材料であり，その性能を改善するためにこれまで多くの研究が行われている．しかし，従来の方法はこれまでの実績と経験則に依存する部分が多く，より高度な材料の開発を推進するには限界がある．本研究は，それを改善するためのものであり，今後の先端材料開発における上流側の設計に大きく寄与するものであると考える．