Conference proceeding
Delamination detection of composite plates using piezoceramic patches and wavelet packet analysis
Proceedings of SPIE, Vol.5393(1), pp.220-230
Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites III
07/20/2004
Handle:
https://hdl.handle.net/2376/116030
Abstract
Composite materials are widely applied in aerospace, mechanical and civil structures. Delamination of composite material happens due to aging, chemical corruption and mechanical vibration, among other factors. It is important to detect the delamination in the incipient stage before the delamination reaches a notable level. Piezoelectric material can act as both actuators and sensors. In this research, two composite plates are fabricated as test specimen, of which one has a small delamination and the other is healthy. Four PZT patches are bonded at four corners of each composite plate, and one PZT patch is bonded in the middle of the composite plate. Wavelet packet analysis is applied as the signal-processing tool to analyze the sensor data. A damage index is formed based on the wavelet packet analysis to show the existence and the severity of damage. The experiment results show the proposed method can detect the delamination. This sensitive method is suited for delamination detection of inaccessible composite structures without using additional excitation facility.
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Details
- Title
- Delamination detection of composite plates using piezoceramic patches and wavelet packet analysis
- Creators
- Haichang Gu - Univ. of Houston (USA)Gangbing Song - Univ. of Houston (USA)Pizhong Qiao - Univ. of Akron (USA)
- Publication Details
- Proceedings of SPIE, Vol.5393(1), pp.220-230
- Conference
- Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites III
- Academic Unit
- Civil and Environmental Engineering, Department of
- Identifiers
- 99900547799401842
- Language
- English
- Resource Type
- Conference proceeding