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논문 기본 정보

자료유형
학술대회자료
저자정보
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대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2003년 추계학술대회논문집
발행연도
2003.11
수록면
1,115 - 1,120 (6page)

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초록· 키워드

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The recent tendency in the automobile industries is toward light weighting vehicle body to improve the
problems by environmental pollution as well as improving fuel cost. The effective way to reduce the weight
of vehicle body seems to be application of new materials for body structure and such trend is remarkable.
Among the various materials for vehicle body, stainless steel sheet (for example, 301L and 304L), TRIP steel
and cold rolled steel sheets are under the interests. However, in order to guarantee reliability of new material
and to establish the long life design criteria of body structure, it is important and require condition to assess
spot weldability of them and fatigue strength of spot welded lap joints which were fabricated under optimized
spot welding condition. And, recently, a new issue in the design of the spot welded structure is to predict
economically fatigue design criterion without additional fatigue tests. In general, for fatigue design of the
spot-welded thin sheet structure, additional fatigue tests according to the welding condition, material, joint
type, and fatigue loading condition are generally required. This indicates that much cost and time for it should
be consumed. Therefore, in this paper, the maximum stresses at nugget edge of spot weld were calculated
through nonlinear finite element analysis first. And next, obtained the f N P . . relation through the actual
fatigue tests on spot welded lap joints of similar and dissimilar high strength steel sheets. And then, the
relation was rearranged in the Δ f N P . . σ- N f relation. From this Δ σ - N f relation, developed the
fatigue design technology for spot welded lap joints of them welded using the optimized welding conditions.

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Abstract

1.서론

2. 유한요소법에 의한 점 용접 이음재의 변형과 응력분포해석

3. 고강도강판 점용접 이음재의 피로강도 평가

4. 결 론

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