ID | 60282 |
フルテキストURL | |
著者 |
Sakamoto, Junji
Graduate School of Natural Science and Technology, Okayama University
Tada, Naoya
Graduate School of Natural Science and Technology, Okayama University
ORCID
Kaken ID
publons
researchmap
Uemori, Takeshi
Graduate School of Natural Science and Technology, Okayama University
Kaken ID
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Kuniyasu, Hayato
Shimadzu Corporation
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抄録 | Turbine blades for thermal power plants are exposed to severe environments, making it necessary to ensure safety against damage, such as crack formation. A previous method detected internal cracks by applying a small load to a target member. Changes in the surface properties of the material were detected before and after the load using a digital holographic microscope and a digital height correlation method. In this study, this technique was applied in combination with finite element analysis using a 2D and 3D model simulating the turbine blades. Analysis clarified that the change in the surface properties under a small load varied according to the presence or absence of a crack, and elucidated the strain distribution that caused the difference in the change. In addition, analyses of the 2D model considering the material anisotropy and thermal barrier coating were conducted. The difference in the change in the surface properties and strain distribution according to the presence or absence of cracks was elucidated. The difference in the change in the top surface height distribution of the materials with and without a crack was directly proportional to the crack length. As the value was large with respect to the vertical resolution of 0.2 nm of the digital holographic microscope, the change could be detected by the microscope.
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キーワード | nondestructive inspection
crack detection
low loading
surface profile
turbine blade
finite element analysis
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発行日 | 2020-07-16
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出版物タイトル |
Applied Sciences
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巻 | 10巻
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号 | 14号
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出版者 | MDPI
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開始ページ | 4883
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ISSN | 2076-3417
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資料タイプ |
学術雑誌論文
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言語 |
英語
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OAI-PMH Set |
岡山大学
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著作権者 | © 2020 by the authors.
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論文のバージョン | publisher
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DOI | |
Web of Science KeyUT | |
関連URL | isVersionOf https://doi.org/10.3390/app10144883
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ライセンス | http://creativecommons.org/licenses/by/4.0/
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助成機関名 |
日本学術振興会
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助成番号 | P18H01337
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