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


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), pp. 1635-1643. (doi:10.1016/j.compscitech.2009.03.019).

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Description/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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.compscitech.2009.03.019
ISSNs: 0266-3538 (print)
Keywords: A. layered structures, B. defects, C. sandwich structures, B. vibration, D. non-destructive testing
Subjects:



Organisations: Engineering Mats & Surface Engineerg Gp, Fluid Structure Interactions Group
ePrint ID: 66399
Date :
Date Event
August 2009Published
Date Deposited: 11 Jun 2009
Last Modified: 18 Apr 2017 21:37
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/66399

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