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

Performance enhancement of nylon/kevlar fiber composites through viscoelastically generated pre-stress
Performance enhancement of nylon/kevlar fiber composites through viscoelastically generated pre-stress
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 pre-stress, 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 pre-stressed composites at low fiber volume fractions. The main findings show that (i) hybrid composites (with no pre-stress) absorb more impact energy than Kevlar fiber-only composites; (ii) pre-stress further increases impact energy absorption in the hybrid case by up to 33%; (iii) pre-stress increases flexural modulus by ?40% in the hybrid composites. These findings are discussed in relation to practical composite applications
0272-8397
931-938
Fazal, A.
926d3b48-d11b-45b1-b922-5c2e8e3ba5fd
Fancey, K.S.
302c38ff-a2df-4dce-bac0-ab094e8d689e
Fazal, A.
926d3b48-d11b-45b1-b922-5c2e8e3ba5fd
Fancey, K.S.
302c38ff-a2df-4dce-bac0-ab094e8d689e

Fazal, A. and Fancey, K.S. (2014) Performance enhancement of nylon/kevlar fiber composites through viscoelastically generated pre-stress. Polymer Composites, 35 (5), 931-938. (doi:10.1002/pc.22737).

Record type: Article

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 pre-stress, 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 pre-stressed composites at low fiber volume fractions. The main findings show that (i) hybrid composites (with no pre-stress) absorb more impact energy than Kevlar fiber-only composites; (ii) pre-stress further increases impact energy absorption in the hybrid case by up to 33%; (iii) pre-stress increases flexural modulus by ?40% in the hybrid composites. These findings are discussed in relation to practical composite applications

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Accepted/In Press date: 13 October 2013
Published date: May 2014
Organisations: EEE

Identifiers

Local EPrints ID: 381440
URI: http://eprints.soton.ac.uk/id/eprint/381440
ISSN: 0272-8397
PURE UUID: 16a380a2-c850-44af-af12-9c5c06712a3b

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Date deposited: 02 Oct 2015 15:17
Last modified: 28 Oct 2019 20:41

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Contributors

Author: A. Fazal
Author: K.S. Fancey

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