• CN:11-2187/TH
  • ISSN:0577-6686

›› 2005, Vol. 41 ›› Issue (8): 199-202.

• 论文 • 上一篇    下一篇

铝合金5083纵向角接板焊接接头疲劳强度

贾法勇;霍立兴;吴冰;王东坡   

  1. 天津大学材料科学与工程学院
  • 发布日期:2005-08-15

FATIGUE STRENGTH OF ALUMINUM 5083 WELDED JOINT WITH LONGITUDINAL FILLET WELDED GUSSET

Jia Fayong;Huo Lixing;Wubing;Wang Dongpo   

  1. School of Materials Science and Engineering, Tianjin University
  • Published:2005-08-15

摘要: 对铝合金5083钨极氩弧焊纵向角接板焊接接头的疲劳强度进行了试验研究,用有限元计算和应变片测量热点应力,用国际焊接学会推荐的方法进行数据处理,并分别做出了名义应力和热点应力疲劳S-N曲线。试验分析说明铝合金5083纵向角接板焊接接头名义应力和热点应力疲劳S-N曲线试验数据拟合斜率为5.62,高于国际焊接学会推荐的斜率为3.0;名义应力试验疲劳极限为54.0 Mpa,热点应力试验疲劳极限为64.8 Mpa;选取3.0进行结构设计具有较高的安全系数;用名义应力疲劳级别FAT28,热点应力疲劳级别FAT40来进行结构设计是安全的。

关键词: 铝合金, 名义应力, 热点应力

Abstract: Fatigue strength of aluminum 5083 welded joint with longitudinal fillet welded gusset by TIG is studied, hot spot stress is computed by the FEM and measured by strain gauges, the test data is statistical treated with the method recommended by IIW, the nominal stress S-N curves and the hot spot stress S-N curves are obtained respectively. The test analysis shows that the fitted slope of test data to nominal stress and hot spot stress S-N curves for aluminum 5083 welded joint with longitudinal fillet welded gusset is 5.62, higher than 3.0 recommended by IIW. The fatigue limit tested for nominal stress and hot spot stress is 54.0 Mpa and 64.8 Mpa respectively. There is greater safety factor in welded structures design if 3.0 applied. Moreover, it is safer to design aluminum alloy welded joint with longitudinal fillet welded gusset with the nominal stress FAT28 and the hot spot stress FAT40.

Key words: Aluminum alloy, Hot spot stress, Nominal stress

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