비파괴검사학회지 (Journal of the Korean Society for Nondestructive Testing)
- 제19권6호
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- Pages.439-447
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- 1999
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- 1225-7842(pISSN)
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- 2287-402X(eISSN)
복합재료-금속 접착접합부의 피로손상의 실시간 평가기법
A Real-time Evaluation Technique of Fatigue Damage in Adhesively Bonded Composite-Metal Joints
- Kwon, Oh-Yang (School of Mechanical Engineering, Inha University) ;
- Kim, Tae-Hyun (School of Mechanical Engineering, Inha University)
- 발행 : 1999.12.30
초록
복합재료-금속 접착접합부가 사용 중 반복하중을 받을 때 발생하는 피로손상을 실시간에 평가할 수 있는 기법으로 음향초음파(acousto-ultrasonics; AU)법을 채택하였으며, 피로시험 중의 단일겹치기(single-lap) 및 이중겹치기 (double-lap) 평판형 시험편에서 취득한 신호로부터 계산된 음향초음파변수(acousto-ultrasonic parameters: AUP)와 피로손상도 사이의 상관관계를 나타내는 곡선을 얻을 수 있었다. 곡선은 피로손상에 의한 고분자기지 복합재료의 강성율 저하(
One of the problems for practical use of fiber-reinforced plastics is the performance degradation by fatigue damage in the joints. The study is to develop a nondestructive technique for real-time evaluation of adhesively bonded composite-metal joints. From the prior study we confirmed that the bonding strength can be estimated from the correlation between the qualify of bonded parts and AUP's. We obtained a curve showing the correlation between the degree of fatigue damage and AUP's calculated from signals acquired during fatigue loading of single-lap and double-lap joints of CFRP and Al6061. The curve is an analogy to the one showing stiffness reduction (
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