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.
초록· 키워드
오류제보하기
A two-dimensional numerical model based on the finite element method was built to simulate the wave propagation phenomena that occur during the ultrasonic time of flight diffraction (TOFD) process. First, longitudinal-wave TOFD was simulated, and the numerical results agreed well with the theoretical results. Shear-wave TOFD was also investigated because shear waves have higher intensity and resolution. The shear wave propagation was studied using three models with different boundary conditions, and the tip-diffracted shear-tolongitudinal wave was extracted from the A-scan signal difference between the cracked and non-cracked specimens. This signal showed very good agreement between the geometrical and numerical arrival times. The results of this study not only provide better understanding of the diffraction phenomena in TOFD, but also prove the potential of shear-wave TOFD for practical application.
목차
Abstract
1. Introduction
2. Background
3. Longitudinal-Wave TOFD Simulation
4. Shear-Wave TOFD Simulation
5. Conclusion Remarks
References
참고문헌 (17)
참고문헌 신청
1. [단행본] - J. P. Charlesworth. / 2000 / Engineering Applications of Ultrasonic Time of Flight Diffraction, Second Ed / Research Studies Press Ltd. : 2 ~ 10
2. [학술지(정기간행물)] - M. G. Silk / 1979 / Defect sizing using ultrasonic diffraction / Brit J. NDT 21 (1) : 12 ~ 15
3. [학술지(정기간행물)] - G. Baskaran. / 2006 / Shear wave time-of-flight diffraction(S-TOFD)technique / NDT&E International 39 : 458 ~ 467
4. [학술지(정기간행물)] - G. Baskaran. / 2007 / Simulation of the TOFD technique using the finite element method / Insight 49 (11) : 641 ~ 646
5. [학술지(정기간행물)] - G. Baskaran. / 2005 / A ray based model for the ultrasonic time-offlight diffraction simulation of thin walled structure inspection / Journal of Pressure Vessel Technology 127 (3) : 262 ~ 268
2. [학술지(정기간행물)] - M. G. Silk / 1979 / Defect sizing using ultrasonic diffraction / Brit J. NDT 21 (1) : 12 ~ 15
3. [학술지(정기간행물)] - G. Baskaran. / 2006 / Shear wave time-of-flight diffraction(S-TOFD)technique / NDT&E International 39 : 458 ~ 467
4. [학술지(정기간행물)] - G. Baskaran. / 2007 / Simulation of the TOFD technique using the finite element method / Insight 49 (11) : 641 ~ 646
5. [학술지(정기간행물)] - G. Baskaran. / 2005 / A ray based model for the ultrasonic time-offlight diffraction simulation of thin walled structure inspection / Journal of Pressure Vessel Technology 127 (3) : 262 ~ 268
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UCI(KEPA) : I410-ECN-0101-2015-500-001243889