2009 Fiscal Year Final Research Report
Development of a structural integrity evaluation system based on remote visual and infrared stress/strain measurement.
| Project/Area Number |
19206015
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Osaka University |
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Principal Investigator |
SAKAGAMI Takahide Osaka University, 工学研究科, 教授 (50192589)
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| Co-Investigator(Kenkyū-buntansha) |
KUBO Shiro 大阪大学, 工学研究科, 教授 (20107139)
NISHIKAWA Izuru 大阪工業大学, 工学部, 教授 (90189267)
MURAKOSHI Jun 独立行政法人土木研究所, 上席研究員 (60355881)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 非破壊評価 / 赤外線サーモグラフィ / 熱弾性応力計測 / デジタル画像相関 / 疲労き裂 / 自己相関ロックイン赤外線法 |
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| Research Abstract |
A new structural integrity evaluation method for steel structures with fatigue cracks was constructed based on remote quantitative nondestructive crack evaluation technique utilizing self-reference lock-in infrared thermography and digital image correlation, as well as fracture mechanics analysis based on on-site thermoelastic stress measurement. It was found from experimental studies for laboratory samples and actual steel bridges that proposed method enabled us to conduct completely remote, noncontact and nondestructive detection of fatigue cracks and to evaluate stress distribution around fatigue cracks.
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