Fatigue design approach for the spot-welded T-type member using a simulated single spot-welded joint |
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| Authors: | D H Bae G Y Lee S K Park |
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| Institution: | (1) School of Mechanical Engineering, Sungkyunkwan University, Gyeonggi, 440-746, Korea;(2) Graduated School, Mechanical Engineering Department, Sungkyunkwan University, Gyeonggi, 440-746, Korea;(3) Civil and Environmental Engineering, Sungkyunkwan University, Gyeonggi, 440-746, Korea |
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| Abstract: | In order to develop a fatigue design method for actual railroad car and commercial vehicle body structures using the fatigue
data of simulated single spot-welded lap joints, we first analyzed the stress distribution and evaluated fatigue strength
of spot-welded T-type members that are the components of actual railroad car and commercial vehicle body structures. Next,
fatigue design approach of these members using the fatigue data of single spot-welded lap joints was investigated. From our
results, we found that, even though there was a quantitative difference of fatigue strength between the single spot-welded
joint and the actual members over the same number of fatigue cycles, through the use of appropriate correction, the fatigue
design criterion of actual spot-welded members, such as those used in railroad car and commercial vehicle body, can be predicted
using the fatigue strength of single spot-welded joint. |
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| Keywords: | Fatigue design Spot-welded T-type member Single spot-welded joint Fatigue strength Fatigue design criterion Stress distribution |
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