焊接残余应力对高强度钢低匹配对接接头静载强度的影响
Influence of residual stress on static load strength of under-matching butt joint of high strength steel
-
摘要: 采用有限元方法研究了焊后拉伸条件下高强度钢等匹配和低匹配对接接头内部应力的变化情况。结果表明，焊后横向和纵向拉伸载荷增至临界失效载荷期间，等匹配和低匹配接头的焊缝区和母材区应力均一直持续增加，但焊缝及近缝母材区应力在焊接残余应力基础上的增加较远端母材区缓慢；最终近缝母材区的应力明显高于远端母材区，未表现出内应力完全调匀的特征；这意味着由于焊接残余应力的存在，高强度钢宽板等匹配焊接结构的静载强度可能略有损失，而高强度钢宽板低匹配焊接结构更将在焊缝低强的影响下损失更大的静载强度。Abstract: By means of Finite Element Method (FEM), the change of internal stress in equal-matching and under-matching butt joint of high strength steel on the condition of tensile load after welding was investigated. The results show that the stress level of both weld and base metal in equal-matching and in under-matching butt joint have continued to increase, during transverse and longitudinal tensile loads after welding reached the critical load of failure. But compared with distal base metal, the stress of the welding zone and their adjacent zone increased more slowly on the basis of welding residual stress. In the end, the stress in base metal zone near the seam was significantly higher than that in the distal base metal zone, and which didn't exhibit the feature of the internal stress complete homogenization. This means that the static load strength of equal-matching welded structure of high strength steel wide plate might reduce a little by Influence of the welding residual stress, and the static load strength of under-matching welded structure of high strength steel wide plate reduced more under the reason of low strength weld seam.
-
-
[1] Deng D, Murakawa H. Numerical simulation of temperature field and residual stress in multi-pass welds in stainless steel pipe and comparison with experimental measurements[J]. Computational Materials Science, 2006(37): 269-277. [2] 杜宝帅, 马学周, 张忠文. 超细晶Q460钢多层多道焊接头残余应力的数值模拟[J]. 焊接学报, 2014, 35(2): 42-47. Du Baoshuai, Ma Xuezhou, Zhang Zhongwen. Numerical simulation of residual stress in multipass weld joint of ultrafine-grained Q460 steel[J]. Transactions of the China Welding Institution, 2014, 35(2): 42-47. [3] 方洪渊, 董俊慧, 王文先. 焊接结构学[M]. 北京: 机械工业出版社, 2008. [4] 汤夕春. 残余应力对H型钢梁柱构件极限承载力影响研究[D]. 武汉: 武汉理工大学, 2006. [5] Biswas P, Mandal N R, Vasu P, et al. Analysis of welding distortion due to narrow-gap welding of upper port plug[J]. Fusion Engineering and Design, 2010, 85(5): 780-788. [6] 霍立兴. 焊接结构的工程强度[M]. 北京: 机械工业出版社, 1995. [7] 赵智力, 杨建国, 刘雪松, 等. 强度失配对接接头残余应力分布的有限元预测[J]. 焊接学报, 2009, 30(8): 97-100. Zhao Zhili, Yang Jianguo, Liu Xuesong, et al. Prediction of residual stresses distribution in strength-mis-matched butt joints using finite element method[J]. Transactions of the China Welding Institution, 2009, 30(8): 97-100. -
期刊类型引用(5)
1. 赵智力，王光临，张远健，方洪渊. 高强钢低匹配等承载对接接头焊接残余应力调匀能力. 焊接学报. 2018(07): 111-114+134 . 
本站查看
2. 李大用，王苹，张广军. 高铬镍奥氏体焊丝Ar/He/CO_2保护脉冲GMAW电弧形态与熔滴过渡. 焊接学报. 2018(07): 55-59+131 . 本站查看
3. 赵瑞荣，阚盈，姜云禄，陈怀宁，韩晓辉. 考虑残余应力的激光搭接焊接头拉伸和疲劳试样宽度标准化. 焊接. 2017(02): 40-43+71 . 百度学术
4. 梁行，姜云禄，陈怀宁，阚盈. 残余应力对薄板激光搭接接头力学性能的影响. 焊接学报. 2017(10): 112-116+134 . 本站查看
5. 李伟良. 关于高强度钢作为汽车轻质材料的应用分析. 时代汽车. 2017(18): 10-11 . 百度学术
其他类型引用(4)
计量
- 文章访问数: 499
- HTML全文浏览量: 1
- PDF下载量: 289
- 被引次数: 9
下载:
