Crack initiation in pipe grade polyethylene

Wen Zhou, Byoung-Ho Choi, Alexander Chudnovsky

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

Crack initiation in pipe grade polyethylene is studied using a circular notch specimen (CNS) under constant load. The specimen geometry and loading conditions are selected in a way that the crack becomes unstable and leads to almost instant fracture after initiation. Therefore the time of crack initiation practically coincides with easily recorded time to failure. The crack initiation takes place within a process zone (PZ) coplanar with the notch and extending from the front of the notch. Two sub-zones are distinguished within PZ. The first, located in the frontal part of PZ comprises of a planar set of micro cavities within a thin strip of material coplanar with the notch. The second, constituting the rest of PZ, consists of micro fibers and membranes resulting from cold drawing of the material between the cavities. With time creep & degradation of micro fibers and membranes leads to crack initiation. Results of experimental observation and an approach to modeling of crack initiation in CNS are reported.

Original languageEnglish
Title of host publicationAnnual Technical Conference - ANTEC, Conference Proceedings
Pages2485-2489
Number of pages5
Volume5
Publication statusPublished - 2006 Jul 10
Externally publishedYes
EventSociety of Plastics Engineers Annual Technical Conference 2006, ANTEC 2006 - Charlotte, NC, United States
Duration: 2006 May 72006 May 11

Other

OtherSociety of Plastics Engineers Annual Technical Conference 2006, ANTEC 2006
CountryUnited States
CityCharlotte, NC
Period06/5/706/5/11

Fingerprint

Crack initiation
Polyethylenes
Pipe
Membranes
Fibers
Creep
Cracks
Degradation
Geometry

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Zhou, W., Choi, B-H., & Chudnovsky, A. (2006). Crack initiation in pipe grade polyethylene. In Annual Technical Conference - ANTEC, Conference Proceedings (Vol. 5, pp. 2485-2489)

Crack initiation in pipe grade polyethylene. / Zhou, Wen; Choi, Byoung-Ho; Chudnovsky, Alexander.

Annual Technical Conference - ANTEC, Conference Proceedings. Vol. 5 2006. p. 2485-2489.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Zhou, W, Choi, B-H & Chudnovsky, A 2006, Crack initiation in pipe grade polyethylene. in Annual Technical Conference - ANTEC, Conference Proceedings. vol. 5, pp. 2485-2489, Society of Plastics Engineers Annual Technical Conference 2006, ANTEC 2006, Charlotte, NC, United States, 06/5/7.
Zhou W, Choi B-H, Chudnovsky A. Crack initiation in pipe grade polyethylene. In Annual Technical Conference - ANTEC, Conference Proceedings. Vol. 5. 2006. p. 2485-2489
Zhou, Wen ; Choi, Byoung-Ho ; Chudnovsky, Alexander. / Crack initiation in pipe grade polyethylene. Annual Technical Conference - ANTEC, Conference Proceedings. Vol. 5 2006. pp. 2485-2489
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