A new protocol for accelerated screening of long-term plasticity-controlled failure of polyethylene pipe grades

M.J.W. Kanters, K. Remerie, L.E. Govaert

Research output: Contribution to journalArticleAcademicpeer-review

21 Citations (Scopus)
22 Downloads (Pure)

Abstract

In this study, a new experimental protocol to evaluate long-term, plasticity-controlled failure using short-term testing is validated on a high-density polyethylene (PE100) pipe grade. The protocol starts with the assessment of the strain rate dependence of the yield stress in uniaxial extension at various temperatures. Additional uniaxial compression tests are performed to characterize the influence of hydrostatic stress. The plastic flow kinetics are subsequently captured using a Ree-Eyring modification of the pressure-modified Eyring flow equation. In combination with the hypothesis that failure occurs at a critical amount of accumulated plastic strain, a versatile tool to predict time-to-failure is obtained. POLYM. ENG. SCI., 2016.

Original languageEnglish
Pages (from-to)676-688
JournalPolymer Engineering and Science
Volume56
Issue number6
DOIs
Publication statusPublished - 2016

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