Lifetime Assessment of Load-Bearing Polymer Glasses: An Analytical Framework for Ductile Failure

Hendrikus A. Visser, Ton C. Bor, Mannes Wolters, Tom A.P. Engels, Leon E. Govaert

Research output: Contribution to journalArticleAcademicpeer-review

30 Citations (Scopus)

Abstract

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

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