1996 Fiscal Year Final Research Report Summary
Ultrasonic stress measurement and evaluation method of deterioration
| Project/Area Number |
07555136
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
土木材料・力学一般
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
KOBAYASHI Shoichi Kyoto Univ., Global Environ.Eng., Prof., 工学研究科, 教授 (90025908)
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| Co-Investigator(Kenkyū-buntansha) |
NISHIMURA Naoshi Kyoto Univ., Global Environ.Eng., Assoc.Prof., 工学研究科, 助教授 (90127118)
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| Project Period (FY) |
1995 – 1996
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| Keywords | Precise wave measurement / Laser velocimetry / sing-around unit / initial stress in a rock / axial force in a bolt / inverse flaw detection / 欠陥検出逆解析 |
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| Research Abstract |
This project aims at fundamental research of 1) ultrasonic stress measurement and 2) evaluation method of deterioration. Main results obtained are as follows :
1) Precise measuring system of ultrasonic wave measuring system is developed by combining a high-power pulse generator and a laser velocimetry.
2) Digital data acquisition, computational and control system is developed by combining the laser velocimetry, digital oscilloscope, GPIB and LabVIEW in stalled in a PC.
3) Using above systems, precise wave measurements are carried out and data are supplied for the fur ther computation and control.
4) Ultrasonic measurement of initial stress in a rock is proposed by characterizing the hysteresis behavior of a rock specimen.
5) Axial stress measurement of a high-strength bolt is proposed.
6) Inverse flaw detection method using observed data combined with boundary element technique is proposed.
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