Journal of Hebei University of Water Resources and Electric Engineering

Journal of Hebei University of Water Resources and Electric Engineering ›› 2023, Vol. 33 ›› Issue (2): 77-82.DOI: 10.16046/j.cnki.issn2096-5680.2023.02.014

• Mechanical Engineering Column • Previous Articles    

Finite Element Analysis and Safety Evaluation of X80 Steel with Crack Defect

Wang Jing1, Yang Bin2, SHI Yan3,4   

  1. 1. CNOOC Safety Technology Services Ltd., 300452, Tianjin, China;
    2. CNOOC(China)Co., Ltd. Tianjin Branch, 300452, Tianjin, China;
    3. Mechanical Engineering Department, Hebei University of Water Resources and Electric Engineering, 061001, Cangzhou, Hebei, China;
    4. Hebei Industrial Manipulator Control and Reliability Technology Innovation Center, 061001, Cangzhou, Hebei, China
  • Received:2022-09-16 Revised:2023-03-16 Online:2023-06-30 Published:2023-10-26

含裂纹缺陷X80钢的有限元分析与安全评价

王静1, 杨彬2, 石岩3,4   

  1. 1.中海油安全技术服务有限公司,天津市滨海新区信环东路中国一重研发大楼12层 300452;
    2.中海石油(中国)有限公司天津分公司,天津市滨海新区海川路2121号渤海石油管理局大厦 300452;
    3.河北水利电力学院机械工程系,河北省沧州市黄河西路49号 061001;
    4.河北省工业机械手控制与可靠性技术创新中心,河北省沧州市黄河西路49号 061001
  • 通讯作者: 石 岩(1981-),女,河北承德人,博士,副教授,主要研究方向为机器人技术及应用、计算机辅助设计。E-mail:shiyan@hbwe.edu.cn
  • 作者简介:王 静(1989-),女,黑龙江拜泉人,工程师,主要研究方向:安全应急技术。E-mail:wangjing85@cnooc.com.cn
  • 基金资助:
    河北省“三三三人才工程”资助项目(A202101026);河北省高等学校基本科研业务费研究项目(SYKY2104)

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Abstract: X80 steel is a low carbon alloy steel with controlled rolling and cooling. It has good strength and toughness and is widely used in oil and gas transportation pipelines. In recent years, failure accidents caused by welding cracks have occurred frequently, and the service safety of welded joints has attracted much attention. The safety evaluation of X80 steel welded joints with cracks is of great significance. In this paper, the fracture parameters of X80 steel welded joints under different stress states, different crack locations and different strength matching under the same load are calculated by finite element simulation. The results show that no matter whether the joint is in the plane stress or plane strain state, high matching or low matching, under the same load, when the crack is located in the heat affected zone (hereinafter referred to as “HAZ”) and the fusion line, the J-integral value is larger than that of the base metal and weld, and the J-integral value at the fusion line is the largest, and the joint is the most dangerous.

Key words: X80 steel, welding crack, finite element simulation, strength matching, fracture analysis, safety evaluation

摘要： X80钢是控轧控冷的低碳合金钢,具有良好的强韧性,在油气运输管线中广泛应用。近几年因焊接裂纹引发的失效事故多发,焊接接头服役安全问题备受关注,有关含裂纹缺陷X80钢焊接接头的安全评价意义重大。文中利用有限元模拟计算X80钢焊接接头在不同应力状态时的同一载荷下,裂纹位于不同位置和不同强度匹配下的断裂参量。结果表明,无论接头处于平面应力还是平面应变状态,高匹配还是低匹配,在同一载荷下,当裂纹位于热影响区HAZ(Heat affected zone)和熔合线时的J积分值比母材和焊缝的都大,且熔合线处的J积分最大,接头最危险。

关键词: X80钢, 焊接裂纹, 有限元模拟, 强度匹配, 断裂分析, 安全评价

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