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。
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 re⁃sponse 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 in⁃creased 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.
作者
张毅
乔亮
范峻铭
闻炯明
孙磊
曹宇光
吕世伟
ZHANG Yi;QIAO Liang;FAN Junming;WEN Jiongming;SUN Lei;CAO Yuguang;LYU Shiwei(College of Pipeline and Civil Engineering,China University of Petroleum(East China),Qingdao 266580,China;Shenzhen Gas Corporation Ltd,Shenzhen 518000,China;Shenzhen Engineering Research Center for Gas Distribution and Efficient Utilization,Shenzhen 518000,China;Changshu Branch,Jiangsu Special Equipment Safety Supervision and Inspection Institute,Changshu 215500,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2021年第11期97-103,共7页
China Plastics
基金
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]。
关键词
聚乙烯
燃气管道
压扁阻断
力学响应
polyethylene
gas pipe
squeeze⁃off
mechanical response
