댓글 0조회 수 77961추천 수 0
?

단축키

이전 문서

다음 문서

+ - Up Down Comment Print
?

단축키

이전 문서

다음 문서

+ - Up Down Comment Print
 
http://link.springer.com/article/10.1007/s12541-014-0614-4

Improvement of crack sizing performance by using nonlinear ultrasonic technique

  • Hogeon Seo
  • , Kyung-Young Jhang 
  • , Kyung-Cho Kim
  • , Dong-Pyo Hong

Abstract

The nonlinear ultrasonic technique (NUT) based on the contact acoustic nonlinearity (CAN) has been considered as a promising method for the closed crack detection. However, most of the previous studies were limited to the modeling of the second-order harmonic wave generation at contacted interfaces and its verification by testing artificially contacted interfaces in the through-transmission method. In this study, we investigated experimentally the contact acoustic nonlinearity at a real crack by using the measurement system constructed in the pitch-catch method that permits the transducers to access the only single side of a test structure. Results showed that the magnitude of the second-order harmonic wave represented the existence of the closed area clearly and that the crack sizing performance was greatly improved by the combination of the linear and nonlinear ultrasonic techniques.

Keywords

Crack sizing Contact interface Contact Acoustic Nonlinearity (CAN) Harmonic wave generationPitch-catch method

Board Pagination ‹ Prev 1 2 3 Next ›
/ 3
Designed by hikaru100

나눔글꼴 설치 안내


이 PC에는 나눔글꼴이 설치되어 있지 않습니다.

이 사이트를 나눔글꼴로 보기 위해서는
나눔글꼴을 설치해야 합니다.

설치 취소

SketchBook5,스케치북5

SketchBook5,스케치북5

SketchBook5,스케치북5

SketchBook5,스케치북5

ISNDE Laboratory
203-2,Engineering Center Annex
Hanyang University,
222 Wangsimni-ro, Seongdong-gu
Seoul 04763, Korea
04763 서울특별시 성동구 왕십리로 222
한양대학교 공업센터 별관 203-2호
지능계측 및 비파괴평가 연구실
Tel: 02 - 2220 - 4220
Fax: 02 - 2299 - 7207