首页 > 论文 > 中国激光 > 45卷 > 12期(pp:1202003--1)

301L搭接激光焊接接头拉伸过程的弹塑性演变及断裂数值分析

Numerical Analysis of Elastic-Plastic Deformation Evolution and Fracture Behavior in Tensile Process of Laser Lap Welded 301L Joints

  • 摘要
  • 论文信息
  • 参考文献
  • 被引情况
  • PDF全文
分享:

摘要

采用数值分析方法,研究了301L不锈钢不同厚度板的非熔透搭接激光焊接接头在拉伸过程中的弹塑性演变、应力分布和拉伸断裂行为。建立了激光焊件的有限元模型,模拟得到的焊件拉伸曲线与实验结果有较好的一致性;随着拉伸载荷的增大,焊接试样塑性变形从靠近焊缝界面的母材向焊缝界面和母材两个方向扩展。随着焊缝熔宽/板厚比的增大,焊接试样的塑性应变区从焊缝界面附近逐渐扩展到母材内,拉伸断裂位移随着塑性变形区的增大而增大。当焊缝熔宽与板厚之比大于0.75时,焊件的断裂位移量大于5 mm,焊件有较高的断裂强度,激光焊缝的剪切断裂强度约为794 MPa。

Abstract

The elastic-plastic deformation evolution, stress distribution and tensile fracture behavior during the tensile process of laser non-penetrating lap welded joints of the 301L stainless steel plates with different thicknesses are studied by the numerical analysis methods. The finite element model of laser welded joints is established and the simulated tensile curves of welded joints are in a relatively good agreement with the experimental results. With the increase of tensile load, the plastic deformation of welded specimens extends from the base metal near the weld interface to both of the weld interface and the base metal. In contrast, with the increase of the ratio of weld width to plate thickness, the plastic strain zone of welded specimens extends gradually from the vicinity of weld interface to the base metal. The tensile fracture displacement increases with the increase of plastic deformation zone. Moreover, when the ratio of weld width to plate thickness is higher than 0.75 and the fracture displacement of welded specimens is larger than 5 mm, the fracture strength is relatively high and the shear fracture strength of laser weld is about 794 MPa.

Newport宣传-MKS新实验室计划
补充资料

中图分类号:TG404

DOI:10.3788/cjl201845.1202003

所属栏目:激光制造

基金项目:原铁道部科技发展项目(2011J015-B)

收稿日期:2018-06-04

修改稿日期:2018-07-23

网络出版日期:2018-07-30

作者单位    点击查看

郭相忠:北京交通大学机械与电子控制工程学院, 北京 100044
刘伟:北京交通大学机械与电子控制工程学院, 北京 100044
王昌坤:北京交通大学机械与电子控制工程学院, 北京 100044
刘慧玉:北京交通大学机械与电子控制工程学院, 北京 100044
范佳斐:北京交通大学机械与电子控制工程学院, 北京 100044

联系人作者:刘伟(weiliu@bjtu.edu.cn); 郭相忠(16116366@bjtu.edu.cn);

【1】Jaxa-Rozen W. Cold-worked austenitic stainless steels in passenger railcars and in other applications[J]. Thin-Walled Structures, 2014, 83: 190-199.

【2】Liu W, Fan H L, Guo X Z, et al. Mechanical properties of resistance spot welded components of high strength austenitic stainless steel[J]. Journal of Materials Science and Technology, 2016, 32(6): 561-565.

【3】Liu W, Sun C J, Xu X Y,et al. The influences of nugget diameter on the mechanical properties and the failure mode of resistance spot-welded metastable austenitic stainless steel[J]. Materials & Design, 2012, 33: 292-299.

【4】Tang D, Wang C M, Tian M, et al. Contrasting study on quality of SUS301L-HT joints in fiber laser welding and MIG welding[J]. Chinese Journal of Lasers, 2015, 42(7): 0703003.
唐舵, 王春明, 田曼, 等. SUS301L-HT不锈钢激光焊接与MIG焊接对比试验研究[J]. 中国激光, 2015, 42(7): 0703003.

【5】Cerrone C, Chiti F, Sacchi M, et al. Application of laser welding to stainless steel light rail vehicle[J]. Welding in the World, 2008, 52(7/8): 27-32.

【6】Chen J K, Shi Y, Liu J, et al. A study of austenitic stainless steel laser welding process[J]. Applied Laser, 2015, 35(3): 335-338.
陈俊科, 石岩, 刘佳, 等. 奥氏体不锈钢激光焊接工艺研究[J]. 应用激光, 2015, 35(3): 335-338.

【7】Li Z J, Lü J X, Zou J L, et al. Microstructure and mechanical property of joints in laser welding of stainless steels with nitrogen shielding gas[J]. Chinese Journal of Lasers, 2016, 43(12): 1202006.
李竹洁, 吕俊霞, 邹江林, 等. 氮气保护不锈钢激光焊接接头组织及力学性能[J]. 中国激光, 2016, 43(12): 1202006.

【8】Zhang J, Gao J S, Xu H, et al. Study on welding process and mechanical properties of laser welded ultra-thin stainless steel[J]. Applied Laser, 2017, 37(3): 379-385.
张婧, 高嘉爽, 许辉, 等. 超薄不锈钢激光焊接工艺及接头性能研究[J]. 应用激光, 2017, 37(3): 379-385.

【9】Yang W X, Xin J J, Fang C, et al. Microstructures and mechanical properties of hundred-millimeter-grade 304 stainless steel joints by ultra-narrow gap laser welding[J]. Chinese Journal of Lasers, 2018, 45(7): 0702005.
杨武雄, 信纪军, 方超, 等. 百毫米级304不锈钢超窄间隙激光焊接头的组织及性能[J]. 中国激光, 2018, 45(7): 0702005.

【10】Yang G S, Yu Z S, Lu Q H, et al. Study of laser welding T-joint of sandwich structure[J]. Chinese Journal of Lasers, 2014, 41(4): 0403003.
杨橄生, 于治水, 卢庆华, 等. 激光焊接三明治结构T型接头的研究[J]. 中国激光, 2014, 41(4): 0403003.

【11】Wang X N, Zheng Z, Zeng P L, et al. Effect of microstructure on hardness and fatigue properties of 800 MPa high strength steel fiber laser weld joints[J]. Chinese Journal of Lasers, 2016, 43(12): 1202010.
王晓南, 郑知,曾盼林, 等. 800 MPa级高强钢光纤激光焊接接头微观结构对硬度及疲劳性能的影响[J]. 中国激光, 2016, 43(12): 1202010.

【12】Liu W, Liu H X, Meng D D, et al. Stress distribution and failure behavior of laser transmission welding parts during tensile process[J]. Chinese Journal of Lasers, 2016, 43(6): 0602003.
刘伟, 刘会霞, 孟冬冬, 等. 激光透射焊接件拉伸过程应力分布和失效行为[J]. 中国激光, 2016, 43(6): 0602003.

【13】Terasaki T, Kitamura T. Prediction of static fracture strength of laser-welded lap joints by numerical analysis[J]. Welding International, 2004, 18(7): 524-530.

【14】Lee J, Asim K, Pan J. Modeling of failure mode of laser welds in lap-shear specimens of HSLA steel sheets[J]. Engineering Fracture Mechanics, 2011, 78(2): 374-396.

【15】Asim K, Lee J, Pan J. Failure mode of laser welds in lap-shear specimens of high strength low alloy (HSLA) steel sheets[J]. Fatigue & Fracture of Engineering Materials & Structures, 2011, 35(3): 219-237.

【16】Asim K, Sripichai K, Pan J. Fatigue behavior of laser welds in lap-shear specimens of high strength low alloy steel sheets[J]. International Journal of Fatigue, 2014, 61: 283-296.

【17】Liu W, Li Q, Jiao D Z, et al. Deformation and strain hardening behaviors of austenitic cold rolled 301L stainless steels[J]. Acta Metallurgica Sinica, 2008, 44(7): 775-780.
刘伟, 李强, 焦德志, 等. 冷轧301L奥氏体不锈钢的变形和应变硬化行为[J]. 金属学报, 2008, 44(7): 775-780.

【18】Liu Y J, Liu W, Xia H T, et al. Fracture behavior and performance of overlap and butt laser welding joints of austenitic stainless steel car body sheets[J]. Journal of the China Railway Society, 2014, 36(1): 28-33.
刘亚姣, 刘伟, 夏海涛, 等. 不锈钢车体板材搭接与对接激光焊接接头的拉伸断裂行为研究[J]. 铁道学报, 2014, 36(1): 28-33.

引用该论文

Guo Xiangzhong,Liu Wei,Wang Changkun,Liu Huiyu,Fan Jiafei. Numerical Analysis of Elastic-Plastic Deformation Evolution and Fracture Behavior in Tensile Process of Laser Lap Welded 301L Joints[J]. Chinese Journal of Lasers, 2018, 45(12): 1202003

郭相忠,刘伟,王昌坤,刘慧玉,范佳斐. 301L搭接激光焊接接头拉伸过程的弹塑性演变及断裂数值分析[J]. 中国激光, 2018, 45(12): 1202003

您的浏览器不支持PDF插件,请使用最新的(Chrome/Fire Fox等)浏览器.或者您还可以点击此处下载该论文PDF