In-situ Raman spectroscopic measurements and micro-photoelastic evaluation of glass structure prior to failure during indentation
Project/Area Number |
16K06730
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Inorganic materials/Physical properties
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Research Institution | The University of Shiga Prefecture |
Principal Investigator |
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Project Period (FY) |
2016-04-01 – 2019-03-31
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Project Status |
Completed (Fiscal Year 2018)
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Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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Keywords | ガラス / 破壊 / 押し込み / 圧子 / ラマン分光 / 光弾性 / 構造 / インデンテーション / 変形 |
Outline of Final Research Achievements |
Raman indenter, which enables us to obtain Raman spectra of glass during indentation, was successfully constructed in this project. Using this set-up, it is found that highly polymerized glass with a lot of bridging oxygens shows more distored microscopic structure under a Vickers indenter than that under a hydrostatic pressure. On the other hand, microscopic structure of de-polymerized glass with non-bridging oxygens is quite different from that under hydrostatic pressure. From in-situ microphotoelastic measurements, it is shown that shear flow in glass under the indenter causes tensile stress around the plastic zone created by the indenter. This is a first experimental confirmation of indentation-induced three-dimensional stress field.
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Academic Significance and Societal Importance of the Research Achievements |
本研究の研究成果は,5件の査読付き論文と10件の学会発表として公開した。論文のうち3件が国際共著論文で,学会発表のうち8件が国際会議における発表(3件の招待講演を含む)であることから,本研究が国際的にも認められ,我が国におけるガラスの強度研究の優位性を世界にアピールできる内容であったことが示される。破壊直前のガラス構造,特に応力により誘起される不均質構造は,現在もなお注目される研究トピックである。本研究の成果を基礎として,今後も国際的な協力関係の下で研究を発展させていくことにより,ガラスの脆さを克服するヒントが得られることが期待される。
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Report
(4 results)
Research Products
(23 results)
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[Journal Article] Micro-Photoelastic Evaluation of Indentation-Induced Stress in Glass2019
Author(s)
Asai, K., Yoshida, S., Yamada, A., Matsuoka, J., Errapart, A. and Kurkjian, C.R.
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Journal Title
MATERIALS TRANSACTIONS
Volume: 60
Issue: 8
Pages: 1423-1427
DOI
NAID
ISSN
1345-9678, 1347-5320
Year and Date
2019-07-01
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] Compositional dependence of indentation-induced residual stresses of sodium aluminosilicate glasses2016
Author(s)
Keisuke Yoshida, Satoshi Yoshida, Akihiro Yamada, Jun Matsuoka, Andrei Errapart, Vera Pukhkaya, Jeremie Teisseire, Etienne Barthel, Charles R. Kurkjian
Organizer
2016 Glass and Optical Division Meeting, The American Ceramic Society
Place of Presentation
Madison, WI, US
Year and Date
2016-05-21
Related Report
Int'l Joint Research
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