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이강용(K. Y. Lee),박정수(J. S. Park) 한국자동차공학회 1992 오토저널 Vol.14 No.6
In the research on the fracture time of soda lime silicate glass under thermal shock, it is shown that the theoretical and experimen~al fracture times are in good agreement, the suggested method to measure critical stress intensity factor for small three-point bending specimen is useful and the edge temperature before thermal shock on cracked side vs. crack length and fracture time are inversely proportional.
이강용(K. Y. Lee),김종성(J. S. Kim),공병석(B. S. Kong),우형표(H. P. Woo) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
The evaluation of joint fatigue strength of light weight materials for electrical vehicle body has been performed through single lap joint tests with the design parameters such as joint style. adherend. bonding overlap length and bonding thickness. It is experimentally observed that lap fatigue strength of joint increases for the increase of overlap length. The. combinations of AI-AI and AI-FRP adherends show that lap fatigue strength of joint. is hardly changed for the increase of bonding thickness. but FRP-FRP adherend specimen shows that lap fatigue strength of joint increases after decreases for the increase of bonding thickness. AI-AI adherend specimen has much higher lap fatigue length than AI-FRP and FRP-FRP adherend specimens. Riveting at adhesive bonded joint gives the little effect on lap fatigue strength.<br/> <br/>
이강용(K.Y.Lee),공병석(B.S.Kong),우형표(H.P.Woo),최홍섭(H.S.Choi) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_2
The evaluation of joint fatigue strength of light weight materials for electrical vehicle body has been performed through T-peel joint tests with the design parameters such as joint style, adherend type, adherend thickness, adhesive thickness, and various adhesives. Fatigue strength was evaluated through 5-Hz, tension-tension, load controlled test with the stress ratio zero value. It is experimentally observed that the fatigue strength of joint increases with the increase of the adherend thickness. With the increase of the adhesive thickness, however, the fatigue strength of joint increases very little. Aluminum-FRP adherend combination shows much higher fatigue strength than Aluminum-Aluminum adherend combination. The results of fatigue test agree with those of static test.<br/>
T형 이음 접합에 의한 경량구조물용 접착이음강도의 평가
이강용(K.Y.Lee),공병석(B.S.Kong),우형표(H.P.Woo) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_2
The bonding strength evaluation of the light weight materials for an electrical vehicle has been performed through the T-peel joint test in which the design parameters such as joint style, adherend type, adherend thickness. adhesive thickness, and various adhesives are considered. It is experimentally observed that the peel strength of joint increases with the increase of the adherend thickness. With the increase of the adhesive thickness. however, the peel strength of joint increases very little. Aluminum-FRP adherend combination shows much higher peel strength than Aluminum-Aluminum adherend combination. For the adhesive bonded joint. the results of FEM analysis agree with those of experiment. Riveting on the adhesive bonded joint makes peel strength increase.
이강용(K.Y.Lee),이영웅(Y.W.Lee),김진(J.Kim) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
To evaluate the optimal joining method in the aspect of stiffness and strength of Al space frame in the electric vehicle, the stress analysis by FEM and strength test was performed. As a result, the strength of adhesive bonded joint was highly affected by the overlap length, bonding thickness and type of adherend. In the joining method of frame, node and bonding method was excellent in the aspect of stiffness and strength.