Development of mechanochemical degradation induced slow crack growth model for high density polyethylene in cracked round bar specimen

Jung Wook Wee, Ilhyun Kim, Byoung Ho Choi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Under certain condition, high density polyethylene exhibits unique discontinuous slow crack growth patterns owing to a process zone in front of the crack tip. Additionally, it undergoes stress corrosion cracking in the oxidative environment, which significantly reduces its lifetime. In this study, a theoretical model describing the stress corrosion crack growth behavior of cracked round bar specimens is developed. The proposed model simulates the discontinuous slow crack growth behavior under fatigue loading within an oxidative environment. The diffusion of the oxidant at the crack tip and the mechanochemical degradation of the process zone medium are simulated. The proposed model is validated via a parametric study performed on several input parameters, as well as via a comparison with experimental results.

Original languageEnglish
Pages (from-to)719-726
Number of pages8
JournalJournal of Mechanical Science and Technology
Volume37
Issue number2
DOIs
Publication statusPublished - 2023 Feb

Bibliographical note

Funding Information:
This research was supported by Kumoh National Institute of Technology (2021).

Publisher Copyright:
© 2023, The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature.

Keywords

  • Cracked round bar specimen
  • Degradation
  • High density polyethylene
  • Pipe
  • Slow crack growth
  • Stress corrosion cracking

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

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