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Title: Practical issues on the detection of damage in beams using wavelets
Authors: Quek, S.T. 
Wang, Q. 
Zhang, L.
Ong, K.H.
Issue Date: Oct-2001
Citation: Quek, S.T., Wang, Q., Zhang, L., Ong, K.H. (2001-10). Practical issues on the detection of damage in beams using wavelets. Smart Materials and Structures 10 (5) : 1009-1017. ScholarBank@NUS Repository.
Abstract: Wavelet transform of dynamic response data, experimentally acquired using a piezoelectric sensor, is presented as a local non-destructive evaluation technique for locating damage is a beam. The higher consistency and accuracy of the results based on data from a piezoelectric sensor over a conventional strain gauge are demonstrated. The allowable range of wavelet scale to process the data is shown to be dependent on the sampling rate, filter frequency and length of signal, where the edge effects due to transformation must also be considered in the latter. By estimating the wave arrival times based on theoretical flexural wave velocity, the approximate wavelet scale to process the data can be determined. Further processing of the signal at a finer wavelet scale is necessary to improve the accuracy. Based on experimental data, the method is shown to be robust with respect to boundary and damage conditions as well as impact position.
Source Title: Smart Materials and Structures
ISSN: 09641726
DOI: 10.1088/0964-1726/10/5/317
Appears in Collections:Staff Publications

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