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무기력계수에 의한 고장력강 및 아연도금강판의 2겹 점용접 피로해석
김규상(Kyoosang Kim),나석찬(Sukchan Na),송준혁(Joonhyuk Song),강희용(Heeyong Kang),유효선(Hyosun Yu),양성모(Sungmo Yang) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2
New steel sheet studies were performed by satisfying environmental standard and customer aspiration recently. So galvanized steel and high strength steel ware developed and extensively used in vehicle body, but this caused difficulties to satisfy design standards of spot welded joint. The reasonable fatigue strength analysis of spot welded joints was very important to estimate the reliability and durability of a vehicle. In this paper, Material S-N curves of galvanized steel sheet EZNCEN and high strength steel sheet HS40R ware obtained with lethargy from quasi static tensile-shear test. Fatigue life of 2-lap spot welded joint ware analyses by the MSC/FATIGUE using the finite element method. Than Fatigue life are presented for EZNCEN and HS40R spot welded joint with Dissimilar Material and welding current.
김규상(Kyoosang Kim),나석찬(Sukchan Na),송준혁(Joonhyuk Song),강희용(Heeyong Kang),유효선(Hyosun Yu),양성모(Sungmo Yang) 한국자동차공학회 2004 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
High strength steel was used vehicle body by satisfying environmental regulation and improving fuel ratio. Vehicle body sheets became thin, strong and functional, but it was insufficient to demand design standards of spot weldment in cold rolled steel and high strength steel. This paper presented a method for determining the fatigue life of cold rolled steel sheet EZNCEN and high strength steel sheet HS40R spot weldment used vehicle. We can be gotten the fatigue life of the spot weldments from the MSC/FATIGUE using the finite element method.