中国塑料 ›› 2025, Vol. 39 ›› Issue (9): 93-100.DOI: 10.19491/j.issn.1001-9278.2025.09.015

• 加工与应用 • 上一篇    下一篇

多口径高性能聚氯乙烯管道爆管试验与压力计算

李伟1(), 唐鹏飞2(), 潘栋3, 石拓4, 莫淑蓓5   

  1. 1.广西壮族自治区合浦公路养护中心,广西 北海 536100
    2.广西大学土木建筑工程学院,南宁 530004
    3.广西交通工程检测有限公司,南宁 530004
    4.广西路建工程集团有限公司,南宁 530021
    5.广西机电职业技术学院,南宁 530007
  • 收稿日期:2025-01-06 出版日期:2025-09-26 发布日期:2025-09-22
  • 通讯作者: 唐鹏飞(1994-),男,工程师,从事塑料输送水管道失效分析和修复等研究, 1612526695@qq.com
    E-mail:HEPULIWEI@163.com;1612526695@qq.com
  • 作者简介:李伟(1971-),男,工程师,从事市政、公路、桥梁工程养护技术等工作,HEPULIWEI@163.com
    第一联系人:地址:北京市海淀区阜成路11号《中国塑料》杂志社
    邮编:100048
  • 基金资助:
    交通运输行业重点科技项目(2022?ZD7?127);中国博士后科学基金面上项目“地区专项支持计划”(2023MD744182)

Burst tests and pressure calculations for PVC⁃UH pipes with various diameters

LI Wei1(), TANG Pengfei2(), PAN Dong3, SHI Tuo4, MO Shubei5   

  1. 1.Guangxi Hepu Highway Maintenance Center,Beihai 536100,China
    2.School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China
    3.Guangxi Traffic Engineering Testing Co,Ltd,Nanning 530004,China
    4.Guangxi Road Construction Engineering Group Co,Ltd,Nanning 530021,China
    5.Guangxi Technological College of Machinery and Electricity,Nanning 530007,China
  • Received:2025-01-06 Online:2025-09-26 Published:2025-09-22
  • Contact: TANG Pengfei E-mail:HEPULIWEI@163.com;1612526695@qq.com

摘要:

为了准确计算高性能聚氯乙烯(PVC⁃UH)管道的爆管压力,通过对4种中小口径的管道进行爆管试验,获得爆管压力,基于PVC⁃UH的材料特点对比了国内外常用爆管压力计算理论用于该管道的适用性和准确性,最后提出基于塑性变形准则的新方法。结果表明,由于材料的特性,用于计算金属类管道爆管压力的计算公式不完全适用于PVC⁃UH管;当采用PVC⁃UH材料的名义屈服强度作为计算参数时,宜采用TSSY准则、修正的Nadai、Bailey⁃Nadai、Welling⁃Uebing、Turner、Bailey、ASME、Barlow系列、最大应力准则、最大剪应力准则以及Zhu⁃Leis方法计算爆管压力;当采用真实断裂强度作为计算参数时,宜采用Tresca准则、Marin⁃2、Svenson、Bohm、API方法计算爆管压力;其中,采用名义屈服强度和真实断裂强度的平均值作为计算参数更合适;提出了0.4 %残余应变失效准则,该准则和两倍弹性变形准则表明,当PVC⁃UH管壁的环向应变达到1.7 %时,管道即发生破坏,从而提出了基于塑性变形的爆管压力计算公式,公式计算值与试验值吻合较好。

关键词: 聚氯乙烯, 管, 爆管压力, 计算对比, 塑性变形失效准则

Abstract:

In this study, the burst pressure calculation methods for PVC⁃UH pipes were investigated through experimental and theoretical analysis. Burst tests were conducted on four types of small⁃to⁃medium diameter pipes to evaluate the applicability and accuracy of various burst pressure calculation theories. Based on the material characteristics of PVC⁃UH, a new calculation method was proposed using a plastic deformation criterion. The results indicated that conventional metal pipe formulas were unsuitable for PVC⁃UH pipes. When using nominal yield strength as the calculation parameter, the TSSY criterion, modified Nadai, Bailey⁃Nadai, Welling⁃Uebing, Turner, Bailey, ASME, Barlow series, maximum stress guidelines, maximum shear stress guidelines, and Zhu⁃Leis method are appropriate. For true breaking strength, the Tresca criterion, Marin⁃2, Svenson, Bohm, and API methods are recommended. The most accurate results were obtained using the average of nominal yield strength and true fracture strength. A 0.4 % residual strain failure criterion was proposed, which demonstrated through twofold elastic deformation analysis that PVC⁃UH pipes fail at 1.7 % circumferential strain. The derived plastic deformation⁃based formula shows excellent agreement with experimental data, providing reliable technical support and theoretical basis for PVC⁃UH pipe burst pressure calculation.

Key words: poly(vinyl chloride), pipe, burst pressure, calculation comparison, plastic deformation failure criterion

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