Improvement of Crack Sizing Performance by using Nonlinear Ultrasonic Technique
- Title
- Improvement of Crack Sizing Performance by using Nonlinear Ultrasonic Technique
- Author
- 장경영
- Keywords
- Crack sizing; Contact interface; Contact Acoustic Nonlinearity (CAN); Harmonic wave generation; Pitch-catch method
- Issue Date
- 2014-11
- Publisher
- KOREAN SOC PRECISION ENG, RM 306, KWANGMYUNG BLDG, 5-4 NONHYUN-DONG, KANGNAM-GU, SEOUL, 135-010, SOUTH KOREA
- Citation
- INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING, 권: 15, 호: 11, 페이지: 2461-2464
- Abstract
- The nonlinear ultrasonic technique (NUT) based on the contact acoustic nonlinearity (CAN) has been considered as a promising method for the closed crack detection. However, most of the previous studies were limited to the modeling of the second-order harmonic wave generation at contacted interfaces and its verification by testing artificially contacted interfaces in the through-transmission method. In this study, we investigated experimentally the contact acoustic nonlinearity at a real crack by using the measurement system constructed in the pitch-catch method that permits the transducers to access the only single side of a test structure. Results showed that the magnitude of the second-order harmonic wave represented the existence of the closed area clearly and that the crack sizing performance was greatly improved by the combination of the linear and nonlinear ultrasonic techniques.
- URI
- https://link.springer.com/article/10.1007%2Fs12541-014-0614-4http://hdl.handle.net/20.500.11754/51401
- ISSN
- 2234-7593; 2005-4602
- DOI
- 10.1007/s12541-014-0614-4
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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