Study on Fatigue Strength Evaluation of Steel Welded Joint by Hot Spot Stress Method

摘要：

Evaluating the fatigue strength of welded structure by the method of hot spot stress becomes widely used. Finite element analysis and extrapolating equation are the most important factors to ensure the hot spot stress. The hot spot stress of the fillet welded gusset which is enduring the bending load was studied, the influence of sizing grid and extrapolating equation was balanced. The result shows that the sizing grid and element type have more influence on the hot spot stress, and the gridding meshing method and extrapolate equation were confirmed. The different transition angles at weld toe which is the important factor for fatigue strength are analyzed. The result shows that the transition angle at weld toodoes not has effect on the hot spot stress. Consequently, hot spo! stress method is much more accurate and simple than nominal stress method.

关键词： fatigue strength welded joint hot spot stress finite element steel

作者: WANG Binjie LI Qiang LIU Zhiming

作者单位: Structural Strength Testing Laboratory Engineering,Beijing Jiaotong University,Beijing 100044,China

会议类型: 国际会议

会议名称: The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)

会议地点: 北京

会议语种:英文

页码: 1853-1857

在线出版日期: 2008-09-24（万方平台首次上网日期，不代表论文的发表时间）