低温环境下栓钉环焊缝焊接残余应力场数值模拟

doi:10.13229/j.cnki.jdxbgxb.20220268

摘要/Abstract

摘要：

为了研究低温环境对栓钉焊接残余应力分布规律的影响，通过ABAQUS建立栓钉模型进行数值模拟，考虑了5个不同的温度进行有限元热-固耦合分析。结果表明：Mises应力、径向残余应力最大值均位于焊缝附近10 mm处，随着距离的增加迅速衰减；环向残余应力在焊缝附近为残余拉应力，远离焊缝处为残余压应力，最大值位于焊缝中心；低温会提高焊接残余应力，Mises应力集中表现在焊缝中心，环向残余应力集中表现在焊缝附近，径向残余应力在焊缝中心及焊缝附近均有所增加。低温对提高焊接残余拉应力影响明显，对残余压应力影响不大。

关键词: 桥梁工程, 栓钉, 低温, 温度场, 残余应力, 数值模拟

Abstract:

In order to study the influence of low temperature environment on the distribution law of welding residual stress， a stud model through ABAQUS for numerical simulation was established， and 5 different temperatures for finite element thermal-solid coupling analysis were considered. The results show that the maximum values of mises stress and radial residual stress are both located at 10 mm near the weld， and decay rapidly with the increase of distance； the hoop residual stress is residual tensile stress near the weld， and is compressive stress away from the weld， and the maximum value is located in the center of the weld； low temperature will increase the residual stress of the weld， the mises stress is concentrated in the center of the weld， the hoop residual stress is concentrated near the weld， and the radial residual stress increases both in the center of the weld and near the weld. The low temperature has a significant effect on increasing the residual tensile stress of welding， but has little effect on the residual compressive stress.

Key words: bridge engineering, stud, low temperature, temperature field, residual stress, numerical simulation

中图分类号:

TU398.9

卫星,高亚杰,康志锐,刘宇辰,赵骏铭,肖林. 低温环境下栓钉环焊缝焊接残余应力场数值模拟[J]. 吉林大学学报(工学版), 2024, 54(1): 198-208.

Xing WEI,Ya-jie GAO,Zhi-rui KANG,Yu-chen LIU,Jun-ming ZHAO,Lin XIAO. Numerical simulation of residual stress field of stud girth weld in low temperature environment[J]. Journal of Jilin University(Engineering and Technology Edition), 2024, 54(1): 198-208.

图/表 16

图1

图2

表1

Q345q材料热物理性能参数"

温度/ $℃$	导热系数/ ［ $W · (m · ℃) - 1$ ］	比热容/ ［J·（kg $? ℃$ ）^-1］	密度/ （kg·m^-3）
-60	51	432	7850
-40	50	437	7850
-20	50	441	7850
0	50	446	7850
20	50	450	7850
100	49	465	7850
200	48	490	7850
300	47	510	7850
500	45	560	7850
700	41	600	7850
1000	28	740	7650
1300	30	700	7350
1500	30	670	7350

表1

表2

Q345q材料力学特性参数"

温度/ $℃$	弹性模量/GPa	泊松比 $μ$	屈服应力/ $M P a$	线膨胀系数/ $10 - 5$
-60	209	0.3	385	1.14
-40	207	0.3	374	1.15
-20	201	0.3	367	1.16
0	202	0.3	366	1.30
20	200	0.3	345	1.30
100	197	0.3	332	1.50
200	191	0.3	308	1.50
300	186	0.3	288	1.60
500	145	0.31	219	1.70
700	72	0.31	83	1.70
1000	19.5	0.36	23	1.70
1300	9.5	0.37	5	1.70
1500	0.1	0.39	1	1.70

表2

图3

图4

图5

图6

图7

图8

图9

图10

图11

图12

图13

图14

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