𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Lifetime Assessment of Load-Bearing Polymer Glasses: The Influence of Physical Ageing

✍ Scribed by Hendrikus A. Visser; Ton C. Bor; Mannes Wolters; Joris G. F. Wismans; Leon E. Govaert

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
561 KB
Volume
295
Category
Article
ISSN
1438-7492

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The timescale at which ductile failure occurs in loaded glassy polymers can be successfully predicted using the engineering approach presented in a previous publication. In this paper the influence of progressive physical ageing on the plastic deformation behaviour of unplasticised poly(vinyl chloride) (uPVC) is characterised and incorporated in the existing approach. With the modification it is possible to quantitatively predict long‐term failures which show a so‐called endurance limit. The predictions are compared with failure data of uPVC specimens which were subjected to constant or dynamic loads. In dynamic loading conditions a second type of failure mode was observed: fatigue crack growth. A brief study on the influence of the frequency and stress ratio of the applied stress signal shows that crack growth failure is not expected to occur within experimentally reasonable timescales for constant loading conditions.

magnified image

πŸ“œ SIMILAR VOLUMES

Lifetime Assessment of Load-Bearing Poly
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. Govae πŸ“‚ Article πŸ“… 2010 πŸ› John Wiley and Sons 🌐 English βš– 537 KB

## 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,