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Fatigue Strength of Tensile Specimen with Butt Welded Joints  

Jo, Jae-Byung (경기대학교 토목환경공학부)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.4, no.4, 2004 , pp. 1-6 More about this Journal
Abstract
Fatigue tests were carried out for butt welded joints with SM520-TMC steel plate with thickness between 20mm and 80mm. The test results were analysed statistically and the effect of plate thickness on the fatigue strength investigated. The fatigue strengths based on nominal stress range satisfy the requirement of the standards. Due to misalignment of the specimens, the measured stresses are higher than the nominal stresses especially for 20mm thick plates. If fatigue strengths are evaluated based on the measured stresses, then the fatigue strengths are greater than those based on nominal stresses. The results show that the thickness effect is similar to the formula proposed by Gurney.
Keywords
SM520TMC; butt welded joint; fatigue test; fatigue strength; thickness effect;
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