Initial studies for AE characterisation of damage in composite materials
Initial studies for AE characterisation of damage in composite materials
Some initial studies for an AE characterisation of damage in composites are presented in this paper. A PAC AE PCI-2 based system and four PAC WD AE broadband sensors are used. Pencil lead breaks (PLB) were used to introduce a source of elastic waves. An initial validation of the system based on PLB on an aluminium plate showed that there was a large difference in sensitivity of the four nominally identical sensors. It is shown that the AE parameters are so strongly related to the sensitivity of the sensors that they tend to describe the AE system more than the actual sources. To characterise damage in composite materials alternative AE parameters are required that are not dependent on the sensitivity of the sensors. In the paper, it is shown that the frequency spectra of the sources have relatively little variability with respect to the sensor. A frequency-based approach that examines the spectrum of each source is proposed in the paper. The procedure is demonstrated using PLBs on a CFRP plate and it is demonstrated that the approach can indicate the position of the source in relation to orientation of the fibres and the plate edge.
acoustic emission, carbon fibre reinforced polymer (CFRP), characterisation, pencil lead breaks (PLBs)
273-278
Venturini Autieri, M.R.
6e1b8f98-0ea9-4ef1-900f-5fe41d38d9d3
Dulieu-Barton, J.M.
9e35bebb-2185-4d16-a1bc-bb8f20e06632
2006
Venturini Autieri, M.R.
6e1b8f98-0ea9-4ef1-900f-5fe41d38d9d3
Dulieu-Barton, J.M.
9e35bebb-2185-4d16-a1bc-bb8f20e06632
Venturini Autieri, M.R. and Dulieu-Barton, J.M.
(2006)
Initial studies for AE characterisation of damage in composite materials.
Advanced Materials Research, 13-14, .
Abstract
Some initial studies for an AE characterisation of damage in composites are presented in this paper. A PAC AE PCI-2 based system and four PAC WD AE broadband sensors are used. Pencil lead breaks (PLB) were used to introduce a source of elastic waves. An initial validation of the system based on PLB on an aluminium plate showed that there was a large difference in sensitivity of the four nominally identical sensors. It is shown that the AE parameters are so strongly related to the sensitivity of the sensors that they tend to describe the AE system more than the actual sources. To characterise damage in composite materials alternative AE parameters are required that are not dependent on the sensitivity of the sensors. In the paper, it is shown that the frequency spectra of the sources have relatively little variability with respect to the sensor. A frequency-based approach that examines the spectrum of each source is proposed in the paper. The procedure is demonstrated using PLBs on a CFRP plate and it is demonstrated that the approach can indicate the position of the source in relation to orientation of the fibres and the plate edge.
This record has no associated files available for download.
More information
Published date: 2006
Keywords:
acoustic emission, carbon fibre reinforced polymer (CFRP), characterisation, pencil lead breaks (PLBs)
Organisations:
Fluid Structure Interactions Group
Identifiers
Local EPrints ID: 41547
URI: http://eprints.soton.ac.uk/id/eprint/41547
PURE UUID: f23bb545-3d6c-4391-89dc-8af46366d4a8
Catalogue record
Date deposited: 26 Sep 2006
Last modified: 08 Jan 2022 03:54
Export record
Contributors
Author:
M.R. Venturini Autieri
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics