Lifetime assessment of load-bearing polymer glasses : an analytical framework for ductile failure

H.A. Visser, T.C. Bor, M. Wolters, T.A.P. Engels, L.E. Govaert

Research output: Contribution to journalArticleAcademicpeer-review

30 Citations (Scopus)
16 Downloads (Pure)

Abstract

The most widespread application of polymers in structural applications is their useas pipe material for e.g. gas distribution systems. Pipes have a design lifetime oftypically 50 years, which rules out real-time lifetime assessment methods. Here, anengineering approach is presented, whichmakes it possible to predict long-term ductilefailure of loaded glassy polymers based on short-term tests. The approach is basedupon the hypothesis that failure is governed by accumulation of plastic deformation upto a critical strain. A pressure-modified Eyring relation is employed to calculate theaccumulation of plastic strain for any simple loading geometry. It is demonstrated that the approach can produce accurate quantitative time-to-failure predictions for loadedPC specimens and uPVC pipe segments.
Original languageEnglish
Pages (from-to)637-651
Number of pages15
JournalMacromolecular Materials and Engineering
Volume295
Issue number7
DOIs
Publication statusPublished - 2010

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