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Investigation of the response to low velocity impact and quasi-static indentation loading of particle-toughened carbon-fibre composite materials

Investigation of the response to low velocity impact and quasi-static indentation loading of particle-toughened carbon-fibre composite materials
Investigation of the response to low velocity impact and quasi-static indentation loading of particle-toughened carbon-fibre composite materials
This work investigates damage caused by low velocity impact and quasi-static indentation loading in four different particle-toughened composite systems, and one untoughened system. For impact tests, a range of energies were used between 25 and 50 J. For QSI, coupons were interrupted at increasing loading point displacement levels from 2 to 5 mm to allow for monitoring of damage initiation and propagation. In both loading cases, non-destructive inspection techniques were used, consisting of ultrasonic C-scan and X-ray micro-focus computed tomography. These techniques are complemented with instrumentation to capture force–displacement data, whereby load-drops are associated with observed damage modes. Key results from this work highlight particular issues regarding strain-rate sensitivity of delamination development and an earlier onset of fibre fracture associated with particle-toughened systems. These issues, in addition to observations on the role of micro-scale events on damage morphology, are discussed with a focus on material development and material testing practices.
B. impact behaviour, B. delamination, C. damage mechanics, x-ray computed tomography
1359-835X
38-46
Bull, D.J.
3569ba02-89de-4398-a14d-02c3f9b4eab2
Spearing, S.M.
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
Sinclair, I.
6005f6c1-f478-434e-a52d-d310c18ade0d
Bull, D.J.
3569ba02-89de-4398-a14d-02c3f9b4eab2
Spearing, S.M.
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
Sinclair, I.
6005f6c1-f478-434e-a52d-d310c18ade0d

Bull, D.J., Spearing, S.M. and Sinclair, I. (2015) Investigation of the response to low velocity impact and quasi-static indentation loading of particle-toughened carbon-fibre composite materials. Composites Part A: Applied Science and Manufacturing, 74, 38-46. (doi:10.1016/j.compositesa.2015.03.016).

Record type: Article

Abstract

This work investigates damage caused by low velocity impact and quasi-static indentation loading in four different particle-toughened composite systems, and one untoughened system. For impact tests, a range of energies were used between 25 and 50 J. For QSI, coupons were interrupted at increasing loading point displacement levels from 2 to 5 mm to allow for monitoring of damage initiation and propagation. In both loading cases, non-destructive inspection techniques were used, consisting of ultrasonic C-scan and X-ray micro-focus computed tomography. These techniques are complemented with instrumentation to capture force–displacement data, whereby load-drops are associated with observed damage modes. Key results from this work highlight particular issues regarding strain-rate sensitivity of delamination development and an earlier onset of fibre fracture associated with particle-toughened systems. These issues, in addition to observations on the role of micro-scale events on damage morphology, are discussed with a focus on material development and material testing practices.

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DJ-Bull-QSI-and-LVI-composites.doc - Accepted Manuscript
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More information

Accepted/In Press date: 11 March 2015
e-pub ahead of print date: 26 March 2015
Published date: July 2015
Keywords: B. impact behaviour, B. delamination, C. damage mechanics, x-ray computed tomography
Organisations: Engineering Science Unit

Identifiers

Local EPrints ID: 376364
URI: https://eprints.soton.ac.uk/id/eprint/376364
ISSN: 1359-835X
PURE UUID: 5b12a1c1-a4a5-44bd-9c51-7291eca57326
ORCID for D.J. Bull: ORCID iD orcid.org/0000-0001-6711-6153
ORCID for S.M. Spearing: ORCID iD orcid.org/0000-0002-3059-2014

Catalogue record

Date deposited: 20 Apr 2015 14:15
Last modified: 07 Aug 2019 05:29

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