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Towards optimisation of load-time conditions for producing viscoelastically prestressed polymeric matrix composites

Fancey, Kevin S.; Wang, Bing

Authors



Abstract

A viscoelastically prestressed polymeric matrix composite (VPPMC) is produced by applying a tensile creep load to polymeric fibres, the load being released before the fibres are moulded into a polymeric matrix. The viscoelastically recovering fibres induce compressive stresses within the matrix, which can improve mechanical properties by up to 50%. This study investigates the feasibility of reducing the creep loading period for VPPMC production. By using nylon 6,6 fibres, we have demonstrated that the previously adopted viscoelastic creep strain, requiring 330 MPa for 24 h, can be achieved over a shorter duration, tn, using increased creep stress. Thus tn was 92 min at 460 MPa and 37 min at 590 MPa. Subject to avoiding fibre damage however, it may be possible to reduce tn further. From the three creep settings, elapsed recovery strain values were similar, as were the Charpy impact test data from corresponding VPPMC samples; i.e. there were no significant differences in impact energy absorption, these being ∼56% greater than their control (unstressed) counterparts.

Journal Article Type Article
Publication Date Feb 15, 2016
Journal Composites. Part B, Engineering
Print ISSN 1359-8368
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 87
Pages 336-342
APA6 Citation Fancey, K. S., & Wang, B. (2016). Towards optimisation of load-time conditions for producing viscoelastically prestressed polymeric matrix composites. Composites. Part B, Engineering, 87, (336-342). doi:10.1016/j.compositesb.2015.09.003. ISSN 1359-8368
DOI https://doi.org/10.1016/j.compositesb.2015.09.003
Keywords Fibres; Polymer-matrix composites (PMCs); Impact behaviour; Mechanical testing; Viscoelasticity
Publisher URL http://www.sciencedirect.com/science/article/pii/S1359836815005387
Copyright Statement © 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Additional Information Authors' accepted manuscript of an article which has been published in: Composites. Part B, Engineering, 2016.

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Copyright Statement
© 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/



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