西南石油大学学报(自然科学版) ›› 2021, Vol. 43 ›› Issue (6): 111-118.DOI: 10.11885/j.issn.1674-5086.2020.10.15.03

• 力学专刊 • 上一篇    下一篇

B型套筒角焊缝力学性能模拟实验

成志强1, 胡聪1, 段金伟2, 吕志伟1, 杨涛1   

  1. 1. 西南交通大学力学与工程学院, 四川 成都 611756;
    2. 中国石油西南油气田分公司输气管理处, 四川 成都 610041
  • 收稿日期:2020-10-15 发布日期:2022-01-08
  • 通讯作者: 成志强,E-mail:chengzhiqiang010@163.com
  • 作者简介:成志强,1969年生,男,汉族,四川成都人,教授,博士,主要从事管道数字孪生体及结构安全方面的工作。E-mail:chengzhiqiang010@163.com;胡聪,1997年生,男,汉族,安徽池州人,硕士研究生,主要从事管道数字孪生体及结构安全研究。E-mail:hucong@my.swjtu.edu.cn;段金伟,1990年生,男,汉族,四川遂宁人,焊接技师,主要从事天然气管道抢险维修焊接方面的工作。E-mail:lzw010lvzhiwei@163.com;吕志伟,1996年生,男,汉族,河南商丘人,硕士研究生,主要从事管道数字孪生体及结构安全研究。E-mail:lzw010lvzhiwei@163.com;杨涛,1996年生,男,汉族,江西赣州人,硕士研究生,主要从事管道数字孪生体及结构安全方面的研究工作。E-mail:yangtao18983998452@163.com
  • 基金资助:
    高等学校博士学科点专项科研基金(20110184110017)

Simulation Test of Mechanical Properties of B-type Sleeve Fillet Weld

CHENG Zhiqiang1, HU Cong1, DUAN Jinwei2, Lü Zhiwei1, YANG Tao1   

  1. 1. School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756, China;
    2. Gas Transmission Management Office, PetroChina Southwest Oil and Gas Field Branch, Chengdu, Sichuan 610041, China
  • Received:2020-10-15 Published:2022-01-08

摘要: X80钢管道的环焊缝缺陷一般采用B型套筒补强的方法。为了进行B型套筒角焊缝力学性能模拟实验,并探究超声冲击对其力学性能的影响,设计多组X80钢材质的品字形角焊缝试件,用以模拟补强管道的拉伸、弯曲、低周疲劳工况。采用万能实验机和疲劳实验机,测得超声冲击处理前后试件的最大拉伸力、最大弯曲载荷和拉伸力-循环次数曲线。实验结果表明,超声冲击处理角焊缝,对B型套筒结构的抗拉强度、弯曲强度、疲劳强度基本没有影响;在管道环焊缝完全开裂的极端情况下,B型套筒角焊缝能承受的极限弯矩约为管道母材的69%。实验结果可为确定B型套筒的适用条件提供基础数据。

关键词: X80钢, B型套筒, 角焊缝, 超声冲击, 力学性能

Abstract: The girth weld defects of X80 steel pipes are generally reinforced by B-type sleeves. In order to carry out the simulation test of the mechanical properties of the B-type sleeve fillet welds, and explore the influence of ultrasonic impact on the mechanical properties, a number of sets of X80 steel fractal fillet weld specimens are designed to simulate the tensile and bending of the reinforced pipe, and low-cycle fatigue conditions. Using universal testing machine and fatigue testing machine, the maximum tensile force, maximum bending load and tensile force-cycle number curve (analog S-N curve) of the specimen before and after ultrasonic impact treatment are measured. The test results show that ultrasonic impact treatment of fillet welds has basically no effect on the tensile strength, bending strength, and fatigue strength of the B-type sleeve structure; in the extreme case of complete cracking of the pipe girth weld, the ultimate bending moment that the B-type sleeve fillet weld can withstand is about 69% of the pipe base material. The test results can provide basic data for determining the applicable conditions of the B-type sleeve.

Key words: X80 steel, B-type sleeve, fillet weld, ultrasonic shock, mechanical properties

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