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초록
Bending fatigue of aluminium alloy was characterized by acoustic nonlinearity of narrow band laser-generated surface wave. The higher harmonic components generated intrinsically by arrayed line laser beam were analyzed theoretically and acoustic nonlinearity was measured successfully on the surface of fatigue damaged aluminium 6061 alloy. The acoustic nonlinearity increased as a function of fatigue cycles and has close relation with damage level. Consequently, the nonlinear acoustic technique of laser-generated surface wave could be potential to characterize surface damages subjected to fatigue.
키워드
레이저; 표면파; 협대역; 굽힘피로; 음향 비선형성; Laser; Surface Wave; Narrow Band; Bending Fatigue; Acoustic Nonlinearity
- 제목
- 협대역 레이저 여기 표면파의 음향비선형성을 이용한 Al6061 합금의 굽힘피로손상 평가
- 제목 (타언어)
- Bending Fatigue Characterization of Al6061 Alloy by Acoustic Nonlinearity of Narrow Band Laser-Generated Surface Wave
- 저자
- 남태형; 최성호; 장경영; 김정석; 이태훈
- 발행일
- 2010-04
- 저널명
- 비파괴검사학회지
- 권
- 30
- 호
- 2
- 페이지
- 139 ~ 145