Damage Inspection of Shell Structures Using a Technology of Ultrasonic Propagation Visualization Based on Laser Scanning Excitation

Yaolu Liu; Jun Zhang; Xuyang Liu; Youxuan Zhao; Ning Hu

doi:10.7779/JKSNT.2018.38.3.149

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자료유형: 학술저널

저자정보: Yaolu Liu (Chongqing University) Jun Zhang (Chongqing University) Xuyang Liu (Chongqing University) Youxuan Zhao (Chongqing University) Ning Hu (Chongqing University)

저널정보: 한국비파괴검사학회 비파괴검사학회지 비파괴검사학회지 제38권 제3호

발행연도: 2018.6

수록면: 149 - 155 (7page)

DOI: 10.7779/JKSNT.2018.38.3.149

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연구주제

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연구배경

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연구방법

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연구결과

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In this work, a small pit on the internal surface of an aluminum thin-walled shell was inspected by using a technology of ultrasonic propagation visualization. This technology employs laser scanning within an inspection area to excite ultrasonic Lamb waves, and three cheap lead zirconate titanate (PZT) sensors to receive the wave signals. The laser scanning area and the three PZT sensors were located on the outside surface of the shell. Betti’s reciprocal theorem was further incorporated into the present technology to visualize the wave propagation in the time-domain. The occurrence of notable scattering around the pit identified from the wave propagation snapshots at different time points can be used to detect the pit damage easily. We further adopted a method based on wave energy flow (WEF) map concept proposed by us to evaluate the size and shape of the pit. It was found that, even using a fast laser scanning of a step size of 8 mm, the present technology can still detect the damage quickly, and evaluate the damage accurately.

#Nondestructive Inspection #Thin-walled Shell #Ultrasonic Lamb Waves #Wave Energy Flow #Visualization Technique

참고문헌 (11)

참고문헌 신청

[학술지(정기간행물)] - B. W. Drinkwater / 2006 / Ultrasonic arrays for nondestructive evaluation: A review / NDT International 39 (7) : 525 ~ 541

[학술지(정기간행물)] - F. Li / 2009 / Guided wave and damage detection in composite laminates using different fiber optic sensors / Sensors 9 (5) : 4005 ~ 4021

[학술지(정기간행물)] - D. Li / 2012 / Monitoring of temperature fatigue failure mechanism for polyvinyl alcohol fiber concrete using acoustic emission sensors / Sensors 12 (7) : 9502 ~ 9513

[학술지(정기간행물)] - M. Morii / 2011 / A new inverse algorithm for tomographic reconstruction of damage images using Lamb waves / Computers Materials & Continua 26 (1) : 37 ~ 66

[학술지(정기간행물)] - B. Hu / 2014 / Tomographic reconstruction of damage images in hollow cylinders using Lamb waves / Ultrasonics 54 (7) : 2015 ~ 2023

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