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《Transactions of the China Welding Institution》 2009-03
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Fatigue analysis of welded joints by method of structural stress

WU Qi,QIU Huiqing,WANG Weisheng (Department of Mechanical Engineering,Tongji University,Shanghai 201804,China).  
Based on the structural stress method,some data of the fatigue strength of 16Mn,which include non-carrying-load fillet cruciform joints,carrying-load fillet cruciform joints and welded joints with longitudinal fillet welded gusset,are analyzed.The discrete structural stress formula which suits for finite element method are deduced,structural stress concentration factors for joints are obtained,and structural S-N curves for these joints are provided.The approach shows the good mesh-size insensitive characteristics.Compared with the nominal stress method,the dispersity of experimental data evaluated by structural stress method is reduced.
【Fund】: 国家科技支撑计划基金资助项目(2007BAF10B00)
【CateGory Index】: TG407
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