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Observations of damage development from compression-after-impact experiments using ex situ micro-focus computed tomography

Observations of damage development from compression-after-impact experiments using ex situ micro-focus computed tomography
Observations of damage development from compression-after-impact experiments using ex situ micro-focus computed tomography
The development of damage mechanisms leading up to compression-after-impact (CAI) failure is studied in particle-toughened and untoughened systems. Microfocus computed tomography (?CT) enabled non-destructive monitoring of the internal damage development in three-dimensions (3D) by taking scans after impact, after an application of near failure compression loads and after coupon failure. In combination with ?CT work, mechanical CAI testing and ultrasonic C-scans were conducted to determine the effect of the projected damage area on residual CAI strength and to complement the observations made from ?CT scans. The important role of the undamaged “cone” of material immediately under the impact site for out-of-plane sublaminate stability is identified. The implication of delamination growth into this region is discussed. It was found that where particle-toughened systems suppressed delamination growth into this region, greater residual CAI strength was maintained on a like-for-like projected damage area
A. carbon fibres, B. delamination, C. damage mechanics, D. non-destructive testing, x-ray computed tomography
0266-3538
106-114
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. (2014) Observations of damage development from compression-after-impact experiments using ex situ micro-focus computed tomography. Composites Science and Technology, 97, 106-114. (doi:10.1016/j.compscitech.2014.04.008).

Record type: Article

Abstract

The development of damage mechanisms leading up to compression-after-impact (CAI) failure is studied in particle-toughened and untoughened systems. Microfocus computed tomography (?CT) enabled non-destructive monitoring of the internal damage development in three-dimensions (3D) by taking scans after impact, after an application of near failure compression loads and after coupon failure. In combination with ?CT work, mechanical CAI testing and ultrasonic C-scans were conducted to determine the effect of the projected damage area on residual CAI strength and to complement the observations made from ?CT scans. The important role of the undamaged “cone” of material immediately under the impact site for out-of-plane sublaminate stability is identified. The implication of delamination growth into this region is discussed. It was found that where particle-toughened systems suppressed delamination growth into this region, greater residual CAI strength was maintained on a like-for-like projected damage area

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e-pub ahead of print date: 24 April 2014
Published date: 16 June 2014
Keywords: A. carbon fibres, B. delamination, C. damage mechanics, D. non-destructive testing, x-ray computed tomography
Organisations: Engineering Science Unit

Identifiers

Local EPrints ID: 364958
URI: http://eprints.soton.ac.uk/id/eprint/364958
ISSN: 0266-3538
PURE UUID: 14293667-df7e-43e3-8100-b8dcac0ef23f
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: 16 May 2014 13:37
Last modified: 10 Dec 2019 01:45

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