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
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
August 2009
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), .
(doi:10.1016/j.compscitech.2009.03.019).
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.
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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
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Date deposited: 11 Jun 2009
Last modified: 13 Mar 2024 18:18
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Author:
Manoj Kumar
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