单调荷载下Q345钢焊缝金属的延性断裂性能研究

陈爱国; 王开明; 邢佶慧; 陈雨

doi:10.6052/j.issn.1000-4750.2019.01.0028

单调荷载下Q345钢焊缝金属的延性断裂性能研究

1.
北京交通大学土木建筑工程学院, 北京 100044;
2.
结构风工程与城市风环境北京市重点实验室, 北京 100044

基金项目: 国家自然科学基金项目（51578044，51578045）；国家留学基金项目（201707095056）

详细信息

作者简介:
王开明(1991-),男,山东人,工程师,硕士,主要从事钢结构断裂方面的研究(E-mail:bestlynnmail@163.com);邢佶慧(1975-),女,黑龙江人,教授,博士,主要从事钢结构抗震方面的研究(E-mail:jhxing@bjtu.edu.cn);陈雨(1995-),男,江苏人,硕士生,主要从事钢结构抗震方面的研究(E-mail:17121018@bjtu.edu.cn).

通讯作者:
陈爱国(1974-),男,江苏人,副教授,博士,主要从事钢结构抗震方面的研究(E-mail:agchen@bjtu.edu.cn).

中图分类号: TU391
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- 文章访问数: 776
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出版历程
- 收稿日期: 2019-01-23
- 修回日期: 2019-06-09
- 刊出日期: 2020-01-24

DUCTILE FRACTURE BEHAVIOR OF WELD METAL FOR Q345 STEEL UNDER MONOTONIC LOADING

1.
School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
2.
Beijing's Key Laboratory of Structural Wind Engineering and Urban Wind Environment, Beijing 100044, China

摘要

摘要: 为了研究Q345钢焊缝金属的延性断裂性能，对9个试件进行了单调荷载下试验研究，试件设计考虑了不同应力三轴度和洛德角分布范围。分别采用Swift、Voce及Swift-Voce混合强化模型，拟合得到了能预测到断裂时的完整应力-应变曲线，其中Swift-Voce混合强化模型模拟各试件荷载-位移曲线精度最好。采用VGM，改进SWDM和Lou模型3种断裂模型，通过编写UVARM子程序，校准了各模型的材料参数，并对各试件进行了有限元断裂模拟预测，比较分析了各个模型的预测精度。结果表明，VGM模型对接近于平面应变状态的矩形缺口和槽板试件的预测结果误差较大，而改进SWDM和Lou模型通过引入洛德角参数来描述偏应力状态，对不同应力状态的试件断裂预测结果精度更高，模型的适用性更好。
- 焊缝金属 /
- 延性断裂 /
- 应力三轴度 /
- 洛德角参数 /
- 强化模型
Abstract: To study the ductile fracture behavior of weld metal for Q345 steel, nine specimens with different distribution of stress triaxiality and Lode angle were tested under monotonic loading. Swift, Voce and mixed swift-voce hardening models were used to fit the full stress-strain curves up to fracture. in comparison, the mixed Swift-Voce hardening model showed the best accuracy in simulating the load-displacement curves of the specimens. In addition, three kinds of fracture prediction models, namely, VGM, modified SWDM and Lou models, were utilized. The material parameters were calibrated by the UVARM subroutine and applied to the finite element numerical simulations. The accuracy of these prediction models were compared and analyzed. The results showed that the VGM model presented a relatively large error in predicting the fracture of rectangular notches and grooved plate specimens when they were near the plane strain state. However, the modified SWDM and Lou models produced accurate predictions when the Lode angle were considered to describe the deviatoric stress state. Based on the fracture prediction results, the modified SWDM and Lou models were effective for specimens of various stress states.
- weld metal /
- ductile fracture /
- stress triaxiality /
- Lode angle parameter /
- hardening model

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参考文献(22)

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文章访问数: 776
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单调荷载下Q345钢焊缝金属的延性断裂性能研究

通讯作者: 陈爱国(1974-),男,江苏人,副教授,博士,主要从事钢结构抗震方面的研究(E-mail:agchen@bjtu.edu.cn).

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出版历程

DUCTILE FRACTURE BEHAVIOR OF WELD METAL FOR Q345 STEEL UNDER MONOTONIC LOADING

期刊类型引用(14)

其他类型引用(11)

计量

出版历程

目录

通讯作者:
陈爱国(1974-),男,江苏人,副教授,博士,主要从事钢结构抗震方面的研究(E-mail:agchen@bjtu.edu.cn).