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남병군,황재석,이효재,백운철,Nam, Byeong-Gun,Hwang, Jae-Seok,Lee, Hyo-Jae,Baek, Un-Cheol 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.5
The reflective photoelastic experiment can be used more effectively than the transparent type in industrial fields. Therefore the reflective photoelastic experimental hybrid method applied to the fatigue fracture problems is introduced in this research. It is verified that the reflective photoelastic experimental hybrid method is very useful on the determination of crack propagation velocity and stress intensity factor of the fatigue crack and on the separation of stress components in the vicinity of fatigue crack tip etc.
남병군,박신희,김현섭,Nam, Byeung Gun,Park, Shin Hee,Kim, Hyun Sup 한국자동차안전학회 2014 자동차안전학회지 Vol.6 No.2
In order to prevent the sharp edge during the side impact, a cause analysis and CAE based risk prediction were carried out in this study. It was found that sharp edge occurs mainly because of stiffness difference between the major parts and structural stress concentration. It could be improved by directly reinforcing the crack initiation region or by weakening the joints connecting the parts. The fracture criterion based on major in-plain strain was suggested and the risk prediction process for sharp edge prevention was established.