지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.10
- 수록면
- 336 - 345 (10page)
- DOI
- 10.7779/JKSNT.2020.40.5.336
이용수
초록· 키워드
오류제보하기
The determination of the acoustic nonlinearity parameter (β) for fluids or solids is composed of two-step measurements: receiver calibration and harmonic generation. The purpose of calibration is to find the receiver transfer function and convert the electrical output of the measured harmonic generation into physical displacements, from which the absolute β value is determined. Therefore, accurate measurement of the receiver transfer function is required for the accurate determination of β This paper presents an accurate and simplified calibration technique for receiving transducers that can eliminate the effects of impedance mismatch and minimize internal reflections from cabling/probe connections. The formula for the receiver transfer function is explicitly derived with the inclusion of diffraction and attenuation effects. After the transfer function is measured with minimal reflections from the cabling/probe connections, its effects on the β determination can be evaluated. Specifically, beam diffraction and material attenuation effects during calibration and harmonic generation measurements are systematically investigated. Diffraction and attenuation corrections were found to have more dominant effects on calibration measurements than on harmonic generation measurements in calculating the β value. After all necessary corrections are made, the β value of 6.46 ± 0.13 is obtained for Al 7075-T6511 samples with five different thicknesses (4, 6, 8, 10, and 12 cm), validating the proposed calibration and β measurement techniques.
목차
Abstract
1. Introduction
2. Receiver calibration and harmonic generation measurements
3. Results and discussion
4. Conclusions
References
참고문헌 (19)
참고문헌 신청
C. Pruell / 2007 / Evaluation of plasticity driven material damage using Lamb waves / Applied Physics Letters 91(23):231911
A. Hikata / 1965 / Dislocation contribution to the second harmonic generation of ultrasonic waves / Journal of Applied Physics 36(1):229~236
J. H. Cantrell / 2004 / Substructural organization, dislocation plasticity and harmonic generation in cyclically stressed wavy slip metals / Proceedings of the Royal Society of London A:Mathematical, Physical and Engineering Sciences 460(2043):757~780
Y. Xiang / 2015 / Creep degradation characterization of titanium alloy using nonlinear ultrasonic technique / NDT & E International 72:41~49
K. Balasubramaniam / 2011 / Creep damage characterization using a low amplitude nonlinear ultrasonic technique / Materials Characterization 62(3):275~286
A. Hikata / 1965 / Dislocation contribution to the second harmonic generation of ultrasonic waves / Journal of Applied Physics 36(1):229~236
J. H. Cantrell / 2004 / Substructural organization, dislocation plasticity and harmonic generation in cyclically stressed wavy slip metals / Proceedings of the Royal Society of London A:Mathematical, Physical and Engineering Sciences 460(2043):757~780
Y. Xiang / 2015 / Creep degradation characterization of titanium alloy using nonlinear ultrasonic technique / NDT & E International 72:41~49
K. Balasubramaniam / 2011 / Creep damage characterization using a low amplitude nonlinear ultrasonic technique / Materials Characterization 62(3):275~286
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