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Failure assessment diagram analysis of high density polyethylene pipes

Authors
Han, Jae-JunRyu, Ho-WanKim, Yun-JaeKim, Jong-SungOh, Young-JinPark, Heung-Bae
Issue Date
12월-2014
Publisher
KOREAN SOC MECHANICAL ENGINEERS
Keywords
Failure assessment diagram; High density polyethylene; Life assessment; PE4710; PE pipes; Shift function method; Single-edge-notch tension specimen; Slow crack growth
Citation
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, v.28, no.12, pp.4929 - 4938
Indexed
SCIE
SCOPUS
KCI
Journal Title
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
Volume
28
Number
12
Start Page
4929
End Page
4938
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/96713
DOI
10.1007/s12206-014-1113-3
ISSN
1738-494X
Abstract
This paper presents an analysis of failure assessment diagram for PE4710 grade high density polyethylene pipes, which are recently concerned to use in the nuclear industry. Available test data of tensile, single edge notched tension specimens and pressurised pipes are summarised and suitably characterised for use in the failure assessment diagram in R6 procedure. Critical crack lengths and failure mode for the pressurised pipes and single edge notched tension specimens are determined under sustained load and compared with test results. Based on the concept of linear elastic fracture mechanics, a slow crack growth rate of PE4710 at 95A degrees C is obtained excluding crack initiation time. To consider the effect of temperature on slow crack growth rate, a shift method is introduced. Remaining life is calculated against the crack margin and compared with the failure time.
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