2010 Fiscal Year Final Research Report
Soundness evaluation for aged structures by a residual stress distribution measurement using grazing SH-wave
| Project/Area Number |
20560396
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Measurement engineering
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| Research Institution | Wakayama University |
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Principal Investigator |
MURATA Yorinobu Wakayama University, システム工学部, 准教 (50283958)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 超音波 / 音弾性 / 表面SH波 / 残留応力 / 非破壊評価 |
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| Research Abstract |
A grazing SH-wave acoustoelastic method using T-type grazing SH-wave sensor is possible to measure residual stress with high accuracy at inspection site even if initial values, such as material anisotropy, were unknown. In this study, the grazing SH-wave acoustoelasticity using thissensor has been applied to the soundness evaluation for aged steel structures. A possibility that the distribution along board thickness of residual stress could also be evaluated by measuring the surface anisotropy just under the surface using T-type grazing SH-wave sensor was shown. Furthermore, it was demonstrated that not only principal stress difference but also principal stress sum was able to be measured by using the value of the acoustic velocity of non-stress which was estimated by measuring surface anisotropy.
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