Dynamic response testing method of damage detection in fibre composite structures

Kerr, James (2015) Dynamic response testing method of damage detection in fibre composite structures. [USQ Project]

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Abstract

This dissertation analyses the practicality of the use of vibration signatures as a method to monitor structural health of a glass pultrusion square hollow section member and to detect the existence, magnitude and location of damage. 12 nodes spaced evenly along the 1m long beam were the test locations where an accelerometer was placed and an impact hammer was used to cause the forced oscillation. The data was collected using an LMS data acquisition system coupled with the LMS Xpress testware.

Two methods of identifying damage were applied. The empirical mode decomposition and the Hilbert-Huang transformation. The empirical mode decomposition proved inadequate at signifying damage, however, the Hilbert-Huang transformation showed clear indication of damage introduction. Figures of all numerical analysis and results are included. Also pictures to aid in understanding of the experiments are also included. A copy of the entire Matlab code used in the numerical analysis of the oscillatory signal.

Based on the results of the experiments and numerical analysis it is deemed that with further research it may be possible to build a industrially suitable dynamic testing method for a wide variety of complex materials that avoids the requirement of specialised technicians, abundant apparatus, lengthy time and costly processes.


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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Engineering project
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Supervisors: Epaarachchi, Jayantha
Date Deposited: 07 Jun 2016 00:04
Last Modified: 07 Jun 2016 00:04
Uncontrolled Keywords: Dynamic response, Hilbert transform, Empirical mode decomposition
Fields of Research : 09 Engineering > 0913 Mechanical Engineering > 091399 Mechanical Engineering not elsewhere classified
URI: http://eprints.usq.edu.au/id/eprint/29262

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