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이수철(S.C.Lee),정의섭(E.S.Jeong),유영철(Y.C.Yu),윤인식(I.S.Yun),이원(W.Yi) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_1
The present study aims to evaluate fatigue damage and detect delamination of single lap tension-shear test specimen by utrasonic method. This study used AI 6061-T6 for test It detected delamination begining point and delamination point from tension-shear test and fatigue test, and evaluated fatigue damage by comparing fatigue life curve of fracture base with fatigue life curve of delamination base.<br/>
유영철(Y. C. Yu),정의섭(E. S. Jeong),윤인식(I. S. Yun),이원(W. Yi) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_1
To investigate the applicability of the structural adhesive to the automobile body, the stress and stress singularity analysis for T type bonded joint are carried out. Various factors such as the adherend thickness, bonded thickness and bonded length which affect on the stress singularity parameters are studied. We concluded that stress singularity factors decreases with increasing bonded thickness or bonded length.<br/> <br/>
박정환(J.W.Park),정의섭(E.S.Jeong),이원(W.Yi) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_2
In this paper as the fundamental study on effcient evaluation of adhesive butt-joint strength evaluation parameter at the interface were discussed. The method for evaluating strength of the adhesive butt-joint without cracks was established by boundary element stress analysis with regard to stress singularity. The substituting extrapolation method as an effective method to obtain the bonded interface edge stress singularity factor K utilizing stress on the bonded interface edge according to the various fillet length and the adhesive layer that is one of the typical bonded-joints used as structural material, was suggested.<br/>