Stress corrosion cracking in plastic pipes: Observation and modeling

Byoung-Ho Choi, Alexander Chudnovsky, Kalyan Sehanobish

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Stress corrosion cracking (SCC) in engineering thermoplastics is commonly observed in the form of a microcrack colony within a surface layer of degraded polymer exposed to a combined action of mechanical stresses and chemically aggressive environment. A probabilistic modeling of SCC initiation is briefly discussed. A deterministic modeling of slow stress corrosion (SC) crack growth process is developed using Crack Layer (CL) theory. Numerical solution of SC crack growth equations is discussed. Comparison of the kinetics of cracks driven by SC and by stress only is presented. Conventional plot of SC crack growth rate vs. the stress intensity factor is constructed and analyzed. An algorithm for conservative estimation of lifetime of engineering thermoplastic subject to a combination of mechanical stresses and chemically aggressive environment is discussed.

Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalInternational Journal of Fracture
Volume145
Issue number1
DOIs
Publication statusPublished - 2007 May 1
Externally publishedYes

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Keywords

  • Crack initiation
  • Crack layer
  • Degradation
  • Stress corrosion cracking

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials

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