1995 Fiscal Year Final Research Report Summary
Investigation in Properties of Interface Flaws by Use of Ultrasonics
| Project/Area Number |
06650499
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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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 University, Faculty of Engineering, Professor, 工学部, 教授 (90025908)
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| Co-Investigator(Kenkyū-buntansha) |
NISHIMURA Naoshi Kyoto University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (90127118)
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| Project Period (FY) |
1994 – 1995
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| Keywords | Ultrasonic / Flaw detection / Inverse analysis / Laser-Doppler vibrometer / Time-domain Boundary Element Method / Digital-data acquisition |
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| Research Abstract |
We intended to investigated in the followings :
1) Identification of flaws : We develop a technique for inverse numerical analysis making use of the time-domain Boundary Elenment Method, which may enable us to detect a flaw in a 3-D body using only several data measured on the surface points.
2) High-precision digital data acquisition system for ultrasonic surface motions : Making use of a laser-Doppler vibrometer and a digital oscilloscope, we set up a high-precision data acquisition system.
3) Inverse analysis using data of wave motions observed in a model surface containing a slit : Using the above-mentioned system we collected scattered wave motion data at several points on the surface of a model having a flaw induced by incident waves of several directions.
4) Evaluation of deterioration of materials : Data obtained using the above-mentioned system are supplied to investigate in several important characteristics as specter, damping, phase and to evaluate the deterioratio of materials.
5) To these objects the followings are results :
1) Almost achieved. 2) Completed. 3) Partly-done, in progress. 4) In preparation.
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