STUDY ON THE SLOW CRACK GROWTH BEHAVIOR OF PE100 PIPE

DU ZhaoXin; DONG JunHua; GAO BingJun

doi:10.16579/j.issn.1001.9669.2019.01.031

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STUDY ON THE SLOW CRACK GROWTH BEHAVIOR OF PE100 PIPE

更新时间：2022-09-22

- STUDY ON THE SLOW CRACK GROWTH BEHAVIOR OF PE100 PIPE
- Journal of Mechanical Strength Vol. 41, Issue 1, Pages: 196-201(2019)
- 作者机构：
  
  1. 河北工业大学化工学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2019.01.031
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DU ZhaoXin, DONG JunHua, GAO BingJun. STUDY ON THE SLOW CRACK GROWTH BEHAVIOR OF PE100 PIPE. [J]. 41(1):196-201(2019)
DOI：

DU ZhaoXin, DONG JunHua, GAO BingJun. STUDY ON THE SLOW CRACK GROWTH BEHAVIOR OF PE100 PIPE. [J]. 41(1):196-201(2019) DOI： 10.16579/j.issn.1001.9669.2019.01.031.

摘要

从PE100管材中直接制取环切圆棒试件(Cracked Round Bar,CRB),根据ISO 18489在不同应力比R=0. 1,0. 2和0. 3下进行疲劳裂纹扩展试验并得到裂纹扩展规律。采用外推法将试验结果外推得到R=1(即表示蠕变)时的裂纹扩展规律。对含有内部环向半椭圆表面裂纹缺陷的PE管材进行剩余寿命计算,得到了在50年服役寿命下的最大允许裂纹尺寸和相应的应力强度因子值。

Abstract

In this article,fatigue crack growth（ FCG） experiments were conducted on cracked round bar（ CRB）specimens manufactured from PE100 pipes at different R-ratios. In addition, these experimental data were employed in extrapolating to the case of creep crack growth（ CCG） on the basis of linear elastic fracture mechanics（ LEFM）. Afterwards,critical crack depth as well as corresponding stress intensity factor for pipes with circumferential crack were determined under service time 50 years.

关键词

疲劳裂纹扩展内部环向裂纹剩余寿命评定应力强度因子

Keywords

Fatigue crack growthInternal circumferential cracksResidual lifetime estimationSIFs

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Related Institution

Zhengzhou Electric Power College

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