T型接头角焊缝几何特征对疲劳性能的影响
孔风1于闯1高明亮1薛世海1晏中华2高珊1
Influence of Weld Seam Geometric Characteristics on Fatigue Performance of T-type Joint
KONG FengYU ChuangGAO MingliangXUE ShihaiYAN ZhonghuaGAO Shan
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作者信息:1.中车长春轨道客车股份有限公司检修研发部， 130062， 长春;
2.沈阳铁路局集团有限公司长春工务段,130062,长春
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Affiliation:CRRC Changchun Railway Vehicles Co., Ltd., 130062, Changchun, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2019.02.016
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中图分类号/CLCN:TG405;U270.6+4
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栏目/Col:研究报告
摘要:
为研究焊缝几何特征对S355钢T型接头角焊缝疲劳性能的影响，运用Abaqus软件，建立了平面型、凸圆弧形、凹圆弧型3种焊缝几何特征的T型接头有限元模型。根据国际铁路联盟标准中的加载指标，计算得到主板上表面距离焊趾0.4倍和1.0倍板厚处沿外载荷方向的最大应力值，并基于热点应力法外推焊趾处的应力值。通过Miner准则进行疲劳积累损伤比的计算和比较，得出相同加载状态下的3种几何特征的T型焊缝抗疲劳能力强弱，并得到以下结论： 凸圆弧形角焊缝累积损伤比最大，抗疲劳能力最差；凹圆弧形角焊缝累积损伤比最小，具有较好的抗疲劳能力。
Abstracts:
In order to study the influence of different weld geometric characteristics on the fatigue performance of S355 steel T-type joints, by using Abaqus software, a T-type joint weld finite element model with three geometric features is established, including planar weld, convex arc weld and concave arc weld. According to the loading index in UIC standards, the maximum stress value of the model that is 0.4 to 1.0 times the distance from the welding toes along the external load direction is calculated, the fatigue resistance of the fillet weld with different geometric characteristics is obtained. It is concluded that the cumulative damage ratio of convex arc weld is the biggest compared with other two welding methods, and the antifatigue ability is the worst.
引文 / Ref:
孔风，于闯，高明亮，等.T型接头角焊缝几何特征对疲劳性能的影响[J].城市轨道交通研究，2019，22（2）：70.
KONG Feng，YU Chuang，GAO Mingliang，et al.Influence of Weld Seam Geometric Characteristics on Fatigue Performance of T-type Joint[J].Urban mass transit，2019，22（2）：70.
KONG Feng，YU Chuang，GAO Mingliang，et al.Influence of Weld Seam Geometric Characteristics on Fatigue Performance of T-type Joint[J].Urban mass transit，2019，22（2）：70.
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