中国塑料 ›› 2021, Vol. 35 ›› Issue (11): 97-103.DOI: 10.19491/j.issn.1001-9278.2021.11.015

• 加工与应用 • 上一篇    下一篇

压扁阻断下聚乙烯管道力学响应的实验研究

张毅1(), 乔亮2,3, 范峻铭2,3, 闻炯明4, 孙磊4, 曹宇光1, 吕世伟1   

  1. 1.中国石油大学(华东)储运与建筑工程学院,山东 青岛 266580
    2.深圳市燃气集团股份有限公司,广东 深圳 518000
    3.深圳市燃气输配及高效利用工程技术研究中心,广东 深圳 518000
    4.江苏省特种设备安全监督检验研究院(常熟分院),江苏 常熟 215500
  • 收稿日期:2021-04-29 出版日期:2021-11-26 发布日期:2021-11-23
  • 作者简介:张毅(1988-),副教授,博士,2017年毕业于加拿大阿尔伯塔大学机械工程学院,主要从事聚乙烯燃气管道损伤失效分析、寿命预测及高分子聚合物损伤失效机理与表征研究,zhangyi@upc.edu.cn
  • 基金资助:
    国家自然科学基金资助项目“基于“虚构无损伤”有效应力测量的半结晶聚合物损伤表征与机理研究”(11802343);江苏省特种设备安全监督检测研究院项目“压扁阻断引起的 PE 燃气管道损伤机理与寿命预测研究”[KJ(Y)2020011]

Experimental Study on Mechanical Response of Polyethylene Pipe Subjected to Squeeze⁃off

ZHANG Yi1(), QIAO Liang2,3, FAN Junming2,3, WEN Jiongming4, SUN Lei4, CAO Yuguang1, LYU Shiwei1   

  1. 1.College of Pipeline and Civil Engineering,China University of Petroleum (East China),Qingdao 266580,China
    2.Shenzhen Gas Corporation Ltd,Shenzhen 518000,China
    3.Shenzhen Engineering Research Center for Gas Distribution and Efficient Utilization,Shenzhen 518000,China
    4.Changshu Branch,Jiangsu Special Equipment Safety Supervision and Inspection Institute,Changshu 215500,China
  • Received:2021-04-29 Online:2021-11-26 Published:2021-11-23

摘要:

采用实验方法系统研究了压扁阻断工艺参数,包括压管速度、松管速度、压缩率、环境温度和管径对聚乙烯(PE)管道力学响应的影响。结果表明,压管过程中PE管道载荷随着压管速度的增大、压缩率的增大、环境温度的降低或管径的增大而增大;卸载过程中PE管道的残余变形随松管速度的增大而增大;维持阶段PE管道的载荷衰减随着压管速度的增大、压缩率的降低、管径的减小或环境温度的降低而增大。

关键词: 聚乙烯, 燃气管道, 压扁阻断, 力学响应

Abstract:

A systematic experimental study was conducted to investigate the effects of squeeze?off parameters, including squeezing speed, release speed, squeezing ratio, environment temperature, and pipe diameter on the mechanical response of PE pipes. The results indicated that the load in PE pipes increased with an increase in squeezing speed, squee?zing ratio, pipe diameter but a decrease in environment temperature. In addition, the residual deformation of PE pipes increased with an increase in unloading speed. Furthermore, the load decay during the stress relation stage increased with an increase in squeezing speed but a decrease in squeezing ratio, pipe diameter, and environmental temperature.

Key words: polyethylene, gas pipe, squeeze-off, mechanical response

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