Browse by author
Lookup NU author(s): Sam Yaakob,
Professor Geoff Gibson
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
The effects of accelerated hydrothermal ageing on the behaviour of composite tubes under multiaxial stress were experimentally investigated. A set of [+/- 55 degrees](4) tubes were hydrothermally aged at 80 degrees C for 1500 h. An indigenous automated test rig was fabricated to accommodate five stress ratios-0H: 1A, 1H: 1A, 2H: 1A, 4H: 1A, and 1H: 0A. The cyclic test involved, pressurising the tube with 1-min pressure and 1-min no-pressure cycles. The first ply failure points were determined from the axial and hoop stresses. Failure envelopes were constructed at the aforesaid five stress ratios. Fourier transform infrared results show an increase in the intensity of absorbance peaks of the OH stretching bands at the interphase. The scanning electron microscopy micrographs of aged samples show clear debonding between the epoxy resin and the glass fibres, which is a cause of failure. Moisture uptake by the epoxy leads to matrix osmotic cracking, resulting in damage. (C) 2016 Elsevier Ltd. All rights reserved.
Author(s): Krishnan P, Majid MSA, Afendi M, Yaacob S, Gibson AG
Publication type: Article
Publication status: Published
Journal: Composite Structures
Print publication date: 15/07/2016
Online publication date: 31/03/2016
Acceptance date: 28/03/2016
ISSN (print): 0263-8223
ISSN (electronic): 1879-1085
Altmetrics provided by Altmetric