Transactions of the Korean Society of Machine Tool Engineers (한국공작기계학회논문집)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Fatigue Life Analysis of Spot Weldment of Cold Rolled and High Strength Steel Using FEM

FEM에 의한 일반냉연강판 및 고장력강판의 점용접 피로수명해석

  • 유효선 (전북대학교 기계항공시스템공학부) ;
  • 양성모 (전북대학교 공업기술연구센터) ;
  • 강희용 (전북대학교 공업기술연구센터) ;
  • 김홍건 (전북대학교 기계자동차공학과) ;
  • 김규상 (전북대학교 공업기술연구센터)
  • Published : 2008.10.15
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Abstract

Cold rolled and high strength steel were used for vehicle bodys to satisfy environmental regulation and improve fuel ratio. This paper presented a method far determining the fatigue life of cold rolled steel sheet EZNCEN and high strength steel sheet HS40R spot weldment used in vehicles. We can estimate the fatigue life of the spot weldments from the MSC/FATIGUE using the finite element method. The maximum load is found in the nugget part of both surfaces. The cold rolled steel and the high strength steel showed the maximum stress 746MPa and 730MPa in the effective nugget part when the weld current was 8KA and 7KA, respectively. Also the some weld current of the cold rolled steel and high strength steel is applied, the fatigue life of high strength steel is obtained about four times longer than the cold rolled steel.

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References

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