复合材料增强管线钢管补口固化应变研究  

Curing Strain of Composite Layer of Composite Reinforced Line Pipe Joint

作　　者：丁楠 张冬娜 周志成 朱永凯[2] DING Nan;ZHANG Dongna;ZHOU Zhicheng;ZHU Yongkai(State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials,CNPC Tubular Goods Research Institute,Xi′an,Shaanxi 710077,China;College of Automation,Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu 210016,China)

机构地区：[1]中国石油集团工程材料研究院有限公司,石油管材及装备材料服役行为与结构安全国家重点实验室,陕西西安710077 [2]南京航空航天大学自动化学院,江苏南京210016

出　　处：《石油管材与仪器》2023年第1期88-91,共4页Petroleum Tubular Goods & Instruments

基　　金：中国石油天然气集团有限公司科学研究与技术开发项目“大口径天然气管道建设关键技术研究”(编号:2019B-3011)。

摘　　要：采用差示扫描量热仪(DSC)研究了单向纤维预浸带在不同升温速率、不同恒温温度下的固化行为。设计并制造了一个复合材料增强管线钢管(CRLP)补口试样,将4个光纤布拉格光栅(FBG)应变传感器埋入相邻两层补口预浸带的层间,进而测试了加热固化对复合材料层轴向应变和环向应变的影响。测试结果表明:基于固化过程中复合材料层内部的应变变化,可以判断固化反应的进行程度。FBG可以准确测试复合材料层内部的残余应变。使用单向纤维预浸带对CRLP接头进行补口,最终形成的复合材料层中会形成残余收缩应变,环向残余应变约0.045%,轴向残余应变约0.35%。The differential scanning calorimeter(DSC)curves were tested at different heating rates and at different isothermal temperatures respectively in order to observe the curing performance of prepreg tape used for composite reinforced line pipe(CRLP)joint.A CRLP joint specimen was prepared,and four FBG strain sensors were embedded in the composite layer during the prepreg tape winding process.The axial strain and hoop strain of the composite layer were tested during the curing process.The FBG results show that the curing process of the composite can be monitored through analyzing the strain data gained by FBGs embedded inside of the composite.The FBG can accurately measure the in-situ curing residual strain of the composite layer.The composite layer winded by unidirectional glass fiber/epoxy resin prepreg tape shrinks in both axial and hoop directions after curing,resulting in that the hoop residual strain is about 0.045%and the axial residual strain is about 0.35%.

关 键 词：复合材料增强管线钢管 光纤光栅 固化 应变 

分 类 号：TE973[石油与天然气工程—石油机械设备]