Estimations of the Adhesion Strength of Galvannealed Coatings on Coated Sheet Using Single Lap-Shear Test

단일겹치기이음시험을 이용한 합금화용융아연코팅강판의 코팅층 접합강도 평가

  • 이정민 (한국국제대학교 자동차공학부) ;
  • 이찬주 (부산대학교 정밀가공시스템공학) ;
  • 고대철 (부산대학교 산학협력단) ;
  • 이선봉 (계명대학교 자동차공학부) ;
  • 김병민 (부산대학교 기계공학부)
  • Published : 2009.06.01


This paper was designed to estimate the adhesion strength of galvannealed coatings on steel sheets. The adhesion strength were evaluated using single lap - shear tests where the lap joint was bonded by structural adhesive. Tests were performed for overlap length of 5mm, 10mm and 15 mm and three directions (0, 45, 90) of steel sheets used as the adherend of the overlap joint. After the tests, FE simulations of the single lap-shear test were also carried out to observe the stress distribution in the interface between the adhesive and the coated sheet. The results showed that the joint failure loads obtained from the tensile tests of bonded single lap-joints were the same, regardless of overlap lengths and directions of steel sheets. Also, the failure of galvannealed coatings greatly depended on shear stress distribution in the interface and the value was about 30MPa.


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