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Low velocity impact detection and damage assessment in composite materials using fibre Bragg grating sensors

Low velocity impact detection and damage assessment in composite materials using fibre Bragg grating sensors
Low velocity impact detection and damage assessment in composite materials using fibre Bragg grating sensors
Low velocity impact (LVQ) is considered potentially dangerous for a composite structure mainly because the damage, in the form of delaminations and matrix cracking, is being created near the back face or within the laminate and might be left undetected. Most of the conventional damage assessment techniques require the composite structure or component to be taken out of service. The development of an in-situ damage monitoring system using embedded fibre optic sensors offers significant benefits. However, few of the efforts to develop an optical fibre sensor system for impact applications can be considered successful [1] due to the significant technical challenges facing the use of fibre optic sensors.

This paper presents a study carried out in the University of Southampton into the detection and assessment of LVI on carbon fibre reinforced plastics (CFRP) using in-fibre Bragg grating sensors and a novel interrogation system developed at the Optoelectronics Research Centre and the Department of Engineering Materials. Preliminary experimental results from impact tests in composites validated and confirmed the high sensitivity and accuracy of the developed system. Furthermore, the relationship between sensor readings and actual impact damage is presented.
Dokos, L.
7676614c-2b1e-45ce-a553-2ed8871a62c0
Mowlem, M.
6f633ca2-298f-48ee-a025-ce52dd62124f
Chambers, A.
74fa9b7e-6362-478e-a038-15f2828c5446
Brambilla, G.
815d9712-62c7-47d1-8860-9451a363a6c8
Dokos, L.
7676614c-2b1e-45ce-a553-2ed8871a62c0
Mowlem, M.
6f633ca2-298f-48ee-a025-ce52dd62124f
Chambers, A.
74fa9b7e-6362-478e-a038-15f2828c5446
Brambilla, G.
815d9712-62c7-47d1-8860-9451a363a6c8

Dokos, L., Mowlem, M., Chambers, A. and Brambilla, G. (2001) Low velocity impact detection and damage assessment in composite materials using fibre Bragg grating sensors. 13th International Conference on Composite Materials, Beijing, China. 24 - 28 Jun 2001.

Record type: Conference or Workshop Item (Paper)

Abstract

Low velocity impact (LVQ) is considered potentially dangerous for a composite structure mainly because the damage, in the form of delaminations and matrix cracking, is being created near the back face or within the laminate and might be left undetected. Most of the conventional damage assessment techniques require the composite structure or component to be taken out of service. The development of an in-situ damage monitoring system using embedded fibre optic sensors offers significant benefits. However, few of the efforts to develop an optical fibre sensor system for impact applications can be considered successful [1] due to the significant technical challenges facing the use of fibre optic sensors.

This paper presents a study carried out in the University of Southampton into the detection and assessment of LVI on carbon fibre reinforced plastics (CFRP) using in-fibre Bragg grating sensors and a novel interrogation system developed at the Optoelectronics Research Centre and the Department of Engineering Materials. Preliminary experimental results from impact tests in composites validated and confirmed the high sensitivity and accuracy of the developed system. Furthermore, the relationship between sensor readings and actual impact damage is presented.

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More information

Published date: 2001
Additional Information: This is a conference publication which will be replaced by either the Chambers, Mowlem Dokos CST paper or Stewart, Chambers, Gordon I.J.Adhesion and adhesives paper (in press)
Venue - Dates: 13th International Conference on Composite Materials, Beijing, China, 2001-06-24 - 2001-06-28

Identifiers

Local EPrints ID: 17106
URI: http://eprints.soton.ac.uk/id/eprint/17106
PURE UUID: fbd633e2-5726-4cd1-80c8-691dc6cb3cac
ORCID for G. Brambilla: ORCID iD orcid.org/0000-0002-5730-0499

Catalogue record

Date deposited: 10 Aug 2005
Last modified: 02 Apr 2022 01:37

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Contributors

Author: L. Dokos
Author: M. Mowlem
Author: A. Chambers
Author: G. Brambilla ORCID iD

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