2016 Fiscal Year Final Research Report
Development of Derivation Method of Dynamic Constants for Constitutive Equation by Indentation
Project/Area Number |
25709004
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Research Category |
Grant-in-Aid for Young Scientists (A)
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Allocation Type | Partial Multi-year Fund |
Research Field |
Materials/Mechanics of materials
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Research Institution | 防衛大学校(総合教育学群、人文社会科学群、応用科学群、電気情報学群及びシステム工学群) |
Principal Investigator |
Yamada Hiroyuki 防衛大学校(総合教育学群、人文社会科学群、応用科学群、電気情報学群及びシステム工, システム工学群, 准教授 (80582907)
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Research Collaborator |
OGASAWARA Nagahisa 防衛大学校, システム工学群, 教授
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Project Period (FY) |
2013-04-01 – 2017-03-31
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Keywords | インデンテーション / ひずみ速度 / 材料構成式 / スプリット・ホプキンソン棒法 / 有限要素法 / 代表ひずみ速度 |
Outline of Final Research Achievements |
In the present design and development of transportation equipment, it is mainstream to conduct simulation analysis using a constitutive equation considering the strain rate dependence of the structural material. In that case, a high-precision constitutive equation is required. Therefore, the dynamic strength properties of the materials are investigated using a high-rate deformation test apparatus such as the split Hopkinson pressure bar method. However, these apparatus require knowledge and skills for users, which hinders the expansion of use to public in general. Therefore, considering to utilize the effect of the strain rate processed as an error factor in the indentation test by the reversal idea, a simple evaluation method of dynamic constants for constitutive equation using the indentation has been developed. In addition, we clarified the physical meaning of the effect of the strain rate on the indentation.
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Free Research Field |
衝撃工学,材料力学,機械材料学
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