Q350EWR1耐候钢塞焊接头疲劳性能分析与剩余寿命预测模型建立

doi:10.3901/JME.260464

机械工程学报 ›› 2026, Vol. 62 ›› Issue (14): 97-105.doi: 10.3901/JME.260464

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Q350EWR1耐候钢塞焊接头疲劳性能分析与剩余寿命预测模型建立

张哲¹, 杨冰¹, 安晓^1,2, 覃佐辉¹, 刘金镑¹, 李成¹, 肖守讷¹

1. 西南交通大学轨道交通运载系统全国重点实验室成都 610031;
2. 二重(德阳)重型装备有限公司德阳 618013

收稿日期:2025-08-26 修回日期:2025-12-16 发布日期:2026-08-29
作者简介:张哲，男，1997年出生，博士研究生。主要研究方向为材料疲劳与断裂。E-mail：zz15140397203@126.com;杨冰(通信作者)，男，1979年出生，博士，研究员，博士研究生导师。主要研究方向为铁道车辆结构强度理论、材料疲劳与断裂和结构可靠性与安全性。E-mail：yb@swjtu.edu.cn
基金资助:
国家自然科学基金(52375159)和轨道交通运载系统全国重点实验室自主课题(2025RVL-T14)资助项目。

Fatigue Performance Analysis and Remaining Useful Life Prediction Model Development of Plug-Welded Joints in Q350EWR1 Weathering Steel

ZHANG Zhe¹, YANG Bing¹, AN Xiao^1,2, QIN Zuohui¹, LIU Jinbang¹, LI Cheng¹, XIAO Shoune¹

1. State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031;
2. Erzhong (Deyang) Heavy Equipment Co., Ltd., Deyang 618013

Received:2025-08-26 Revised:2025-12-16 Published:2026-08-29

摘要/Abstract

摘要： 为探究不同塞焊形式对疲劳裂纹扩展行为的影响并建立剩余寿命预测模型，选用Q350EWR1耐候钢设计单点、两点串联、两点并联和三点串联4种典型塞焊接头，开展轴向拉–拉疲劳裂纹扩展试验。其次，利用数字图像相关技术获取裂纹扩展过程中的表面应变场，并结合Franc 3D有限元分析和M积分法计算应力强度因子，采用7点增量多项式法获得裂纹扩展速率，建立基于Paris律的寿命预测模型。结果表明，裂纹均萌生于熔核边缘，串联形式边缘焊点受力集中、损伤更重，并联形式受力均匀且承载能力提升效率更高。4种塞焊接头的剩余寿命预测模型拟合优度R²均大于0.92，可实现不同接头形式剩余寿命的可靠定量预测，为工程中评估接头服役安全性与制定检修策略提供了科学依据。

关键词: 塞焊, 疲劳裂纹扩展, 数字图像相关, 应力强度因子, 剩余寿命预测模型

Abstract: To investigate the influence of different plug-welded configurations on fatigue crack growth behavior and to establish a remaining useful life prediction model, four typical plug-welded joints were fabricated using Q350EWR1 weathering steel：single-point, two-point in series, two-point in parallel, and three-point in series. Axial tension-tension fatigue crack growth tests were conducted on these specimens. Digital image correlation was employed to capture the surface strain fields during crack propagation. The stress intensity factors were calculated through Franc 3D finite element analysis combined with the M-integral method, while the crack growth rates were determined using the seven-point incremental polynomial method. A life prediction model was then developed based on the Paris law. The results show that cracks initiated at the fusion zone edge in all specimens. In series configurations, edge welds exhibited pronounced stress concentration and greater damage, whereas parallel configurations achieved more uniform stress distribution and higher load-carrying efficiency. For all four plug-welded configurations, the remaining useful life prediction models achieved coefficients of determination (R²) exceeding 0.92, enabling reliable quantitative predictions of service life across different joint types. These findings provide a scientific basis for evaluating joint safety in service and formulating maintenance strategies in engineering applications.

Key words: plug-welded joints, fatigue crack growth, digital image correlation, stress intensity factor, remaining useful life prediction model

中图分类号:

O344
U270

张哲, 杨冰, 安晓, 覃佐辉, 刘金镑, 李成, 肖守讷. Q350EWR1耐候钢塞焊接头疲劳性能分析与剩余寿命预测模型建立[J]. 机械工程学报, 2026, 62(14): 97-105.

ZHANG Zhe, YANG Bing, AN Xiao, QIN Zuohui, LIU Jinbang, LI Cheng, XIAO Shoune. Fatigue Performance Analysis and Remaining Useful Life Prediction Model Development of Plug-Welded Joints in Q350EWR1 Weathering Steel[J]. Journal of Mechanical Engineering, 2026, 62(14): 97-105.

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http://www.cjmenet.com.cn/CN/Y2026/V62/I14/97

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Q350EWR1耐候钢塞焊接头疲劳性能分析与剩余寿命预测模型建立

Fatigue Performance Analysis and Remaining Useful Life Prediction Model Development of Plug-Welded Joints in Q350EWR1 Weathering Steel

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