中国塑料 ›› 2022, Vol. 36 ›› Issue (10): 90-97.DOI: 10.19491/j.issn.1001-9278.2022.10.014

• 加工与应用 • 上一篇    下一篇

聚酯纤维增强热塑性塑料复合管扣压接头密封性能研究与结构优化

张学敏1(), 黄浩瀚1, 李厚补2, 齐国权2, 赵元超1, 丁晗2, 高雄3, 杨文辉3   

  1. 1.长安大学材料科学与工程学院,西安 710064
    2.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,西安 710077
    3.陕西延长石油西北橡胶有限责任公司,陕西 咸阳 712023
  • 收稿日期:2022-06-27 出版日期:2022-10-26 发布日期:2022-10-27
  • 作者简介:张学敏(1982—),女,副教授,从事材料失效分析及模拟仿真技术研究,xueminzhang@chd.edu.cn
  • 基金资助:
    长安大学中央高校基本科研业务费专项基金(300102310201)

Study on load⁃bearing performance and structural optimization of buckling joint of polyester⁃fiber⁃reinforced plastic composite pipe

ZHANG Xuemin1(), HUANG Haohan1, LI Houbu2, QI Guoquan2, ZHAO Yuanchao1, DING Han2, GAO Xiong3, YANG Wenhui3   

  1. 1.School of Materials Science and Engineering,Chang'an University,Xi'an 710064,China
    2.State Key Laboratory for Perpormance and Structural Safety of Petroleum Tubular Goods and Equipment Materials,CNPC Tubular Goods Research Institute,Xi'an 710077,China
    3.Shaanxi Yanchang Petroleum Northwest Rubber LLC,Xianyang 712023,China
  • Received:2022-06-27 Online:2022-10-26 Published:2022-10-27

摘要:

基于有限元法建立了聚酯纤维增强塑料复合管道与其金属扣压接头的三维装配模型,分析了扣压量及接头结构参数对接头密封性能的影响。结果表明,随着扣压量的增加,接头密封性能逐渐提高,但在大扣压量下管体会发生塑性变形,管道密封性能下降;随着锯齿角度增加,接头密封性能先增大后减小,当角度大于55 °时,管体会发生塑性变形;锯齿高度越大,接头密封性能越好,但增加到3 mm时,芯管端部应力值会达到断裂强度;接头锯齿数不宜过多,在齿数达到14时,管体在接头端部会受到严重挤压。综合考虑密封性能与接头强度,确定扣压接头的最佳扣压量为5.5 mm,最佳结构参数为锯齿角度为50 °、齿高为2.5 mm、锯齿数为11。

关键词: 复合管, 金属接头, 密封性能, 接触压力, 结构优化, 有限元

Abstract:

Based on the finite element method, a three⁃dimensional finite element model was established for the assembly of polyester fiber reinforced plastic composite pipe and its metal clamping joint, and the influence of clamping amount and joint structural parameters on the joint sealing performance was analyzed. The results indicated that the sealing performance of the joint was improved with an increase in the clamping amount. However, the plastic deformation occurred in the tube under a large clamping amount, leading to a decrease in sealing performance. As the serrated angle increased, the sealing performance of the joint increased at first and then tended to decrease. The tube suffered plastic deformation at an angle greater than 55 °. The higher the sawtooth height, the better was the sealing performance of the joint. When the sawtooth height increased up to 3 mm, the stress value at the end of the core tube reached the strength at break. It is not recommended to set too many serrated teeth in the joint. When the number of teeth reaches 14, the tube body was severely squeezed at the end of the joint. Considering of the sealing performance and joint strength, the optimum clamping quantity was determined to be 5.5 mm, and the optimum structural parameters were determined to be a serrated angle of 50 °, a tooth height of 2.5 mm, and a serrated number of 11.

Key words: composite pipe, metal joint, sealing performance, contact pressure, structural optimization, finite element

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