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Performance enhancement of nylon/Kevlar fiber composites through viscoelastically generated pre-stress

Fazal, Adnan; Fancey, Kevin S.

Authors

Adnan Fazal

Abstract

Kevlar-29 fibers have high strength and stiffness but nylon 6,6 fibers have greater ductility. Thus by commingling these fibers prior to molding in a resin, the resulting hybrid composite may be mechanically superior to the corresponding single fiber-type composites. The contribution made by viscoelastically generated prestress, via the commingled nylon fibers, should add further performance enhancement. This paper reports on an initial study into the Charpy impact toughness and flexural stiffness of hybrid (commingled) nylon/Kevlar fiber viscoelastically prestressed composites at low fiber volume fractions. The main findings show that (i) hybrid composites (with no prestress) absorb more impact energy than Kevlar fiber-only composites; (ii) prestress further increases impact energy absorption in the hybrid case by up to 33%; (iii) prestress increases flexural modulus by ~40% in the hybrid composites. These findings are discussed in relation to practical composite applications.

Publication Date 2014-05
Journal Polymer composites
Print ISSN 0272-8397
Electronic ISSN 1548-0569
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 35
Issue 5
Pages 931-938
Institution Citation Fazal, A., & Fancey, K. S. (2014). Performance enhancement of nylon/Kevlar fiber composites through viscoelastically generated pre-stress. Polymer composites, 35(5), 931-938. https://doi.org/10.1002/pc.22737
DOI https://doi.org/10.1002/pc.22737
Keywords Nylon/Kevlar fibre composites
Publisher URL http://onlinelibrary.wiley.com/doi/10.1002/pc.22737/abstract
Copyright Statement ©2015 University of Hull
Additional Information Author's accepted manuscript of article published in: Polymer composites, 2014, v.35, issue 5

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