2219铝合金FSW接头残余应力分布特点

发布时间：2018-06-03 01:31

本文选题：铝合金 + 搅拌摩擦焊　；参考：《焊接学报》2017年09期

【摘要】：采用压痕应变法测量2219-T87高强铝合金FSW试板与筒体结构上典型位置的残余应力.结果表明,在试板上接头残余应力呈不对称分布,焊缝上的纵向残余应力数值高于横向残余应力,纵向应力的最大拉应力出现在焊缝中心位置,最大压应力出现在后退侧轴肩外侧,横向残余应力的最大压应力出现在前进侧轴肩边缘;筒体结构的环缝上,纵向残余应力呈较大拉应力,横向残余应力的数值较小,纵缝接头处残余应力关于焊缝中心呈对称分布,纵向残余应力在焊缝上呈拉应力,横向残余应力在焊缝上呈压应力;压力试验使结构件上部分应力释放,应力数值略有下降.
[Abstract]:The residual stress in typical position of 2219-T87 high strength aluminum alloy FSW test plate and tube was measured by indentation strain method. The results show that the residual stress of the joint on the test plate is asymmetrical, the value of the longitudinal residual stress on the weld is higher than that of the transverse residual stress, and the maximum tensile stress of the longitudinal stress appears in the center of the weld. The maximum compressive stress appears on the outer side of the receding shaft shoulder, the maximum compressive stress of the transverse residual stress appears on the edge of the forward side shaft shoulder, the longitudinal residual stress shows a large tensile stress and the value of the transverse residual stress is relatively small, and the longitudinal residual stress appears on the circumferential joint of the cylindrical structure. The residual stress in the longitudinal joint is symmetrically distributed to the center of the weld, the longitudinal residual stress is tensile stress on the weld, the transverse residual stress is compressive stress on the weld, and the pressure test results in partial stress release and a slight decrease in the stress value.
【作者单位】：天津大学天津市现代连接技术重点实验室;中国航天科技集团公司长征机械厂;
【基金】：国家自然科学基金资助项目(51475325) 天津市应用基础与前沿技术研究计划资助项目(14JCYBJC19100)
【分类号】：TG404

【相似文献】