Yes / The shrinkage force exerted by restrained shape memory polymers can potentially be used
to close cracks in structural concrete. This paper describes the physical processing and
experimental work undertaken to develop high shrinkage die-drawn Polyethylene
Terephthalate (PET) shape memory polymer tendons for use within a crack closure system.
The extrusion and die-drawing procedure used to manufacture a series of PET tendon samples
is described. The results from a set of restrained shrinkage tests, undertaken at differing
activation temperatures, are also presented along with the mechanical properties of the most
promising samples.
The stress developed within the tendons is found to be related to the activation temperature,
the cross-sectional area and to the draw rate used during manufacture. Comparisons with
commercially-available PET strip samples used in previous research are made, demonstrating
an increase in restrained shrinkage stress by a factor of two for manufactured PET filament
samples. / Thanks must go to the EPSRC for their funding of the Materials for Life (M4L) project (EP/K026631/1) and to Costain Group PLC. for their industrial sponsorship of the project and author.
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/11340 |
| Date | 01 February 2017 |
| Creators | Teall, O.R., Pilegis, M., Sweeney, John, Gough, Timothy D., Thompson, Glen P., Jefferson, A., Lark, R., Gardner, D. |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Article, Accepted Manuscript |
| Rights | © 2017 IOP Publishing Ltd. Reproduced in accordance with the publisher's self-archiving policy. This Accepted Manuscript will be available for reuse under a CC BY-NC-ND 3.0 licence. |
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