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

Visser, Hendrikus A. and Bor, Ton C. and Wolters, Mannes and Engels, Tom A.P. and Govaert, Leon E. (2010) Lifetime Assessment of Load-Bearing Polymer Glasses: An Analytical Framework for Ductile Failure. Macromolecular Materials and Engineering, 295 (7). pp. 637-651. ISSN 1438-7492

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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.
Item Type:	Article
Copyright:	Wiley-VCH Verlag
Faculty:	Engineering Technology (CTW)
Research Chair:	Production Technology (PT)
Research Group:	Design, Production and Management (DPM)
Link to this item:	http://purl.utwente.nl/publications/72430
Official URL:	http://dx.doi.org/10.1002/mame.200900369
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