2014 Fiscal Year Final Research Report
Mechanical field analysis of lattice defects in nanoscale composite materials
| Project/Area Number |
24560091
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 格子欠陥 / 計算力学 / 準連続体法 / 転位 / 粒界 / 原子シミュレーション / 複合材料 |
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| Outline of Final Research Achievements |
Non-linear mechanical fields around lattice defects in nano-scale composite materials was investigated by using the quasicontinuum (QC) and atomic simulations. First, the relationship between the grain size dependence of dislocation self-energy and the shear modulus of grain boundary (GB) regions was examined based on an elastic approach by the newly developed QC model. Next, GB structures were directly expressed by using atomic models and it was found that atomic shuffling in GB regions could shield the mechanical field caused by lattice dislocations. Furthermore, the influence of hetero-interface strength on the mechanical properties of multilayered composites was investigated by using atomic simulations. The decomposition of the lattice dislocation core structure at the hetero-interface is strongly affected by the interface strength; hence, the hetero-interface strength is one of the important factors to design an excellent material with high strength and high ductility.
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| Free Research Field |
計算材料力学
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