Nonlinear Ultrasonic Phased Array Imaging for Fatigue Crack Propagation Location Detection

doi:10.3901/JME.2024.24.025

Abstract

Abstract: A nonlinear ultrasonic phased array imaging method is developed for fatigue crack growth monitoring. An equivalent amplitude modulation of incident wave is realized through two phased array focusing modes of physical focusing and virtual focusing. The nonlinear harmonic generation is analyzed indirectly by using the fundamental frequency energy loss ratio. The nonlinear imaging detection of closed fatigue crack under conventional phased array hardware conditions is realized, and verified by second harmonic scanning. This method was further applied to the monitoring of fatigue crack growth process, and its ability of quantifying crack size, detecting early damage and monitoring fatigue life was investigated with the aid of micro measurement. The results show that compared with conventional linear ultrasonic phased array, nonlinear ultrasonic phased array imaging detect the closed part of fatigue crack more effectively. The method is sensitive to early damage, and effective detection can be achieved from about 16% of the fatigue life, and the fatigue crack size can be accurately quantified and the crack propagation can be monitored. This method has a good development prospect in service structure life research and emergency prevention.

Key words: phased array, nonlinear imaging, fatigue crack, monitoring

CLC Number:

TG156

TENG Da, LIU Zhiyong, LIU Lishuai, XIANGYanxun, XUANFuzhen. Nonlinear Ultrasonic Phased Array Imaging for Fatigue Crack Propagation Location Detection[J]. Journal of Mechanical Engineering, 2024, 60(24): 25-34.

References

[1] DRINKWATER B W，WILCOX P D. Ultrasonic arrays for non-destructive evaluation: a review[J]. NDT&E INT，2006，39(7)：525-541.
[2] NAGY P B. Fatigue damage assessment by nonlinear ultrasonic materials characterization[J]. Ultrasonics，1998，36(1)：375-381.
[3] 周正干，刘斯明. 非线性无损检测技术的研究、应用和发展[J]. 机械工程学报，2011，47(8)：2-11.ZHOU Zhenggan，LIU Siming. Research，application and development of nonlinear non-destructive testing technology[J]. Journal of Mechanical Engineering，2011，47(8)：2-11.
[4] OHARA Y，MIHARA T，SASAKI R，et al. Imaging of closed cracks using nonlinear response of elastic waves at subharmonic frequency[J]. Applied Physics Letters，2007，90(1)：011902.
[5] OHARA Y，YAMAMOTO S，MIHARA T，et al. Ultrasonic evaluation of closed cracks using subharmonic phased array[J]. Japanese Journal of Applied Physics，2008，47(5)：3908-3915.
[6] SUGAWARA A，JINNO K，OHARA Y，et al. Closed-crack imaging and scattering behavior analysis using confocal subharmonic phased array[J]. Japanese Journal of Applied Physics，2015，5：07HC08.
[7] OHARA Y，HORINOCHI S，HASHIMOTO M，et al. Nonlinear ultrasonic imaging method for closed cracks using subtraction of responses at different external loads[J]. Ultrasonics，2011，51(6)：661-666.
[8] TAKAHASHI K，JINNO K，OHARA Y，et al. Evaluation of crack closure stress by analyses of ultrasonic phased array images during global preheating and local cooling[J]. Japanese Journal of Applied Physics，2014，53：07KC20.
[9] OHARA Y，TAKAHASHI K，INO Y，et al. High-selectivity imaging of closed cracks in a coarse-grained stainless steel by nonlinear ultrasonic phased array[J]. NDT&E INT，2017，91(1)：139-147.
[10] OHARA Y，POTTER J，NAKAJIMA H，et al. Multi-mode nonlinear ultrasonic phased array for imaging closed cracks[J]. Japanese Journal of Applied Physics，2019，5：SGGB06.
[11] PARK C S，KIM J W，CHO S，et al. A high resolution approach for nonlinear sub-harmonic imaging[J]. NDT&E INT，2016，79：114-122.
[12] 高鹏，李法新. 非线性超声相控阵无损检测系统及实验研究[J]. 实验力学，2014，29(1)：1-11. GAO Peng，LI Faxin. Nonlinear ultrasonic phased array nondestructive testing：System and performance study[J]. Journal of Experimental Mechanics，2014，29(1)： 1-11.
[13] YUN D，KIM J，JHANG K Y. Imaging of contact acoustic nonlinearity using synthetic aperture technique[J]. Ultrasonics，2013，53(7)：1349-1354.
[14] SEO H，PYUN D K，JHANG K Y. Synthetic aperture imaging of contact acoustic nonlinearity to visualize the closing interfaces using tone-burst ultrasonic waves[J]. Mechanical Systems and Signal Processing，2019，125：257-274.
[15] IKEUCHI M，JINNO K，OHARA Y，et al. Improvement of closed crack selectivity in nonlinear ultrasonic imaging using fundamental wave amplitude difference[J]. Japanese Journal of Applied Physics，2013，52：07HC08.
[16] OHARA Y，NAKAJIMA H，HAUPERT S，et al. Nonlinear ultrasonic phased array with fixed-voltage fundamental wave amplitude difference for high-selectivity imaging of closed cracks[J]. Acoustical Society of America，2019，146(1)：266-277.
[17] OHARA Y，NAKAJIMA H，HAUPERT S，et al. Imaging of three-dimensional crack open/closed distribution by nonlinear ultrasonic phased array based on fundamental wave amplitude difference[J]. Japanese Journal of Applied Physics，2020，59：SKKB01.
[18] HAUPERT S，RENAUD G，SCHUMM A. Ultrasonic imaging of nonlinear scatterers buried in a medium[J]. NDT&E INT，2017，87(5)：1-6.
[19] HAUPERT S，OHARA Y，CARCREFF E，et al. Fundamental wave amplitude difference imaging for detection and characterization of embedded cracks[J]. Ultrasonics，2019，96：132-139.
[20] POTTER J N，CROXFORD A J，WILCOX P D. Nonlinear ultrasonic phased array imaging[J]. Physical Review Letters，2014，113(14)：144301.
[21] CHENG J，POTTER J N，CROXFORD A J，et al. Monitoring fatigue crack growth using nonlinear ultrasonic phased array imaging[J]. Smart Materials and Structures，2017，26(5)：055006.
[22] CHENG J，POTTER J N，DRINKWATER B W. The parallel-sequential field subtraction technique for coherent nonlinear ultrasonic imaging[J]. Smart Materials and Structures，2018，27(6)：065002.
[23] POTTER J，CROXFORD A J. Characterization of nonlinear ultrasonic diffuse energy imaging[J]. Ultrasonics，Ferroelectrics，and Frequency Control，IEEE Transactions on，2018，65(5)：870-880.
[24] 焦敬品，杨素方，马婷，等. 基于不同相控聚焦模式的非线性超声阵列成像方法研究[J]. 机械工程学报，2016，52(14)：15-24.JIAO Jingpin，YANG Sufang，MA Ting，et al. Nonlinear imaging using ultrasonic array under different phased mode[J]. Journal of Mechanical Engineering，2016，52(14)：15-24.
[25] HOLMES C，DRINKWATER B W，WILCOX P D. Post-processing of the full matrix of ultrasonic transmit–receive array data for non-destructive evaluation[J]. NDT & E International，2005，38(8)：701-711.