An experimental study on the manufacture and characterization of in-plane fibre-waviness defects in composites

Christian, William ORCID: 0000-0003-3638-7297, DiazDelaO, Francesco Alejandro, Atherton, Kathryn and Patterson, EA ORCID: 0000-0003-4397-2160 (2018) An experimental study on the manufacture and characterization of in-plane fibre-waviness defects in composites. Royal Society Open Science, 5 (5). 180082-.

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Abstract

A new method has been developed for creating localized in-plane fibre waviness in composite coupons and used to create a large batch of specimens. This method could be used by manufacturers to experimentally explore the effect of fibre waviness on composite structures both directly and indirectly to develop and validate computational models. The specimens were assessed using ultrasound, digital image correlation and a novel inspection technique capable of measuring residual strain fields. To explore how the defect affects the performance of composite structures, the specimens were then loaded to failure. Predictions of remnant strength were made using a simple ultrasound damage metric and a new residual strain-based damage metric. The predictions made using residual strain measurements were found to be substantially more effective at characterizing ultimate strength than ultrasound measurements. This suggests that residual strains have a significant effect on the failure of laminates containing fibre waviness and that these strains could be incorporated into computational models to improve their ability to simulate the defect.

Item Type:	Article
Uncontrolled Keywords:	non-destructive evaluation, composite materials, in-plane fibre waviness, residual stress
Depositing User:	Symplectic Admin
Date Deposited:	23 May 2018 09:01
Last Modified:	19 Jan 2023 06:33
DOI:	10.1098/rsos.180082
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3021642

Available Versions of this Item

• An Experimental Study on the Manufacture and Characterisation of In-plane Fibre-waviness Defects in Composites. (deposited 16 Apr 2018 09:51)
  • An experimental study on the manufacture and characterization of in-plane fibre-waviness defects in composites. (deposited 23 May 2018 09:01) [Currently Displayed]