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Damage Detection on Thin-walled Structures Utilizing Laser Scanning and Standing Waves

레이저 스캐닝 및 정상파를 이용한 평판 구조물의 손상탐지

  • Kang, Se Hyeok (School of Mechanical Engineering, Chonnam Nat'l Univ.) ;
  • Jeon, Jun Young (School of Mechanical Engineering, Chonnam Nat'l Univ.) ;
  • Kim, Du Hwan (School of Mechanical Engineering, Chonnam Nat'l Univ.) ;
  • Park, Gyuhae (School of Mechanical Engineering, Chonnam Nat'l Univ.) ;
  • Kang, To (Nuclear Convergence Technology Division, Korea Atomic Energy Research Institute) ;
  • Han, Soon Woo (Nuclear Convergence Technology Division, Korea Atomic Energy Research Institute)
  • 강세혁 (전남대학교 기계공학부) ;
  • 전준영 (전남대학교 기계공학부) ;
  • 김두환 (전남대학교 기계공학부) ;
  • 박규해 (전남대학교 기계공학부) ;
  • 강토 (한국원자력연구원) ;
  • 한순우 (한국원자력연구원)
  • Received : 2016.11.29
  • Accepted : 2017.01.04
  • Published : 2017.05.01

Abstract

This paper describes wavenumber filtering for damage detection using single-frequency standing wave excitation and laser scanning sensing. An embedded piezoelectric sensor generates ultrasonic standing waves, and the responses are measured using a laser Doppler vibrometer and mirror tilting device. After scanning, newly developed damage detection techniques based on wavenumber filtering are applied to the full standing wave field. To demonstrate the performance of the proposed techniques, several experiments were performed on composite plates with delamination and aluminum plates with corrosion damage. The results demonstrated that the developed techniques could be applied to various structures to localize the damage, with the potential to improve the damage detection capability at a high interrogation speed.

Keywords

Laser Doppler Vibrometery;Damage Detection;Wave Propagation;Wavenumber Filtering

Acknowledgement

Supported by : 교육과학기술부, 한국연구재단, 미래창조과학부

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