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김영신(Yeongsin Kim),배동호(Dongho Bae),박근수(Keunsoo Park) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
Stainless steel sheets are widely used as the structural material for the railroad cars and the commercial vehicles. These kinds structures used stainless steel sheets are commonly fabricated by using the gas welding. for fatigue design of gas welded joints such as fillet and plug type joint, it is necessary to obtain design information on stress distribution at weldment as well as fatigue strength of gas welded joints. And also, the influence of the geometrical parameters of gas welded joints on stress distribution and fatigue strength must be evaluated. Therefore. in order to establish a reasonable and systematic fatigue design criterion for the long life design of the fillet welded body structure. in this study, stress distribution around the fillet welded joints subjected to tensile load was numerically analyzed. Also. the △P-Nf curves were obtained by fatigue tests. Using these results, △P-Nf curves were rearranged in the △δ-Nf relation with the hot spot stress at the fillet welded joint.