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Late-stage fatigue damage in a 3D orthogonal non-crimp woven composite: an experimental and numerical study

Ogin, SL, Topal, S, Baiocchi, L, Crocombe, AD, Potluri, P, Withers, PJ, Quaresimin, M, Smith, PA, Poole, MC and Bogdanovich, AE (2015) Late-stage fatigue damage in a 3D orthogonal non-crimp woven composite: an experimental and numerical study Composites Part A: Applied Science and Manufacturing, 79. pp. 155-163.

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Abstract

Late-stage fatigue damage of an E-glass/epoxy 3D orthogonal non-crimp textile composite loaded in the warp direction has been investigated using a combination of mechanical testing, X-ray micro computed tomography (μCT), optical microscopy and finite element modelling. Stiffness reduction and energy dissipated per cycle were found to be complementary measurements of damage accumulation, occurring in three stages: a first stage characterised by rapid changes, a more quiescent second stage, followed by a third stage where the (decreasing) stiffness and (increasing) energy dissipation change irregularly and then rapidly, to failure. Microscopy of specimens cycled into the transition between the second and third stages showed macroscopic accumulations of fibre fractures in sections of warp tows which lying adjacent to the surface weft tows which are crowned-over by the Z-tows. At these locations, the warp tow fibres are subjected to stress concentrations both from transverse weft tow matrix cracks and resin pocket cracks.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
AuthorsEmailORCID
Ogin, SLUNSPECIFIEDUNSPECIFIED
Topal, SUNSPECIFIEDUNSPECIFIED
Baiocchi, LUNSPECIFIEDUNSPECIFIED
Crocombe, ADUNSPECIFIEDUNSPECIFIED
Potluri, PUNSPECIFIEDUNSPECIFIED
Withers, PJUNSPECIFIEDUNSPECIFIED
Quaresimin, MUNSPECIFIEDUNSPECIFIED
Smith, PAUNSPECIFIEDUNSPECIFIED
Poole, MCUNSPECIFIEDUNSPECIFIED
Bogdanovich, AEUNSPECIFIEDUNSPECIFIED
Date : 15 December 2015
Identification Number : 10.1016/j.compositesa.2015.08.020
Additional Information : © 2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Depositing User : Symplectic Elements
Date Deposited : 19 Nov 2015 11:52
Last Modified : 29 Aug 2016 01:08
URI: http://epubs.surrey.ac.uk/id/eprint/809245

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