The University of Southampton
University of Southampton Institutional Repository

Experimental validation of modal strain energies based damage identification method for a composite sandwich beam

Experimental validation of modal strain energies based damage identification method for a composite sandwich beam
Experimental validation of modal strain energies based damage identification method for a composite sandwich beam
A vibration-based damage identification method, based on changes in modal strain energies before and after occurrence of damage, is presented for a composite sandwich beam. Experiments were performed to obtain the natural frequencies and mode shapes for validation of the presented method. The observed changes in modal strain energies were used for the prediction of existence and location of damage in a composite sandwich beam. Subsequently, these changes were also used to predict damage extents in the two stages. In the first stage, the proposed method is used to approximate the damage extents in the face and core. These were updated to obtain more accurate values of damage extent at the second stage by using the model updating theory. Experimental and numerical results were presented to demonstrate and verify the effectiveness of this method for several single and multiple damage cases. These damage cases also include interactive damage modes. Results indicate that the proposed method is capable of identifying the location and extent of damage in the faces and core of a composite sandwich beam.
A. layered structures, B. defects, C. sandwich structures, B. vibration, D. non-destructive testing
0266-3538
1635-1643
Kumar, Manoj
9c2173aa-5e5a-42d4-981e-522ed30c9248
Shenoi, R.A.
a37b4e0a-06f1-425f-966d-71e6fa299960
Cox, S.J.
0e62aaed-24ad-4a74-b996-f606e40e5c55
Kumar, Manoj
9c2173aa-5e5a-42d4-981e-522ed30c9248
Shenoi, R.A.
a37b4e0a-06f1-425f-966d-71e6fa299960
Cox, S.J.
0e62aaed-24ad-4a74-b996-f606e40e5c55

Kumar, Manoj, Shenoi, R.A. and Cox, S.J. (2009) Experimental validation of modal strain energies based damage identification method for a composite sandwich beam. Composites Science and Technology, 69 (10), 1635-1643. (doi:10.1016/j.compscitech.2009.03.019).

Record type: Article

Abstract

A vibration-based damage identification method, based on changes in modal strain energies before and after occurrence of damage, is presented for a composite sandwich beam. Experiments were performed to obtain the natural frequencies and mode shapes for validation of the presented method. The observed changes in modal strain energies were used for the prediction of existence and location of damage in a composite sandwich beam. Subsequently, these changes were also used to predict damage extents in the two stages. In the first stage, the proposed method is used to approximate the damage extents in the face and core. These were updated to obtain more accurate values of damage extent at the second stage by using the model updating theory. Experimental and numerical results were presented to demonstrate and verify the effectiveness of this method for several single and multiple damage cases. These damage cases also include interactive damage modes. Results indicate that the proposed method is capable of identifying the location and extent of damage in the faces and core of a composite sandwich beam.

This record has no associated files available for download.

More information

Published date: August 2009
Keywords: A. layered structures, B. defects, C. sandwich structures, B. vibration, D. non-destructive testing
Organisations: Engineering Mats & Surface Engineerg Gp, Computational Engineering and Design, Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 66399
URI: http://eprints.soton.ac.uk/id/eprint/66399
ISSN: 0266-3538
PURE UUID: 70c5e53b-c4c5-40dd-bfcb-e5882fe25a36

Catalogue record

Date deposited: 11 Jun 2009
Last modified: 13 Mar 2024 18:18

Export record

Altmetrics

Contributors

Author: Manoj Kumar
Author: R.A. Shenoi
Author: S.J. Cox

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

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×