Experimental verification of tapping sound analysis for the inspection of laminated composite structures

Joon Seok Hwang; Seung Jo Kim

doi:10.1117/12.470708

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18 June 2002 Experimental verification of tapping sound analysis for the inspection of laminated composite structures

Joon Seok Hwang, Seung Jo Kim

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Proceedings Volume 4704, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Civil Infrastructures; (2002) https://doi.org/10.1117/12.470708
Event: NDE For Health Monitoring and Diagnostics, 2002, San Diego, California, United States

Abstract

In this paper, an experimental study was performed to investigate the possibility of a new NDE system - Tapping Sound Analysis (TSA). The tapping sound and contact force of healthy laminated composite structure and defective laminated composite structure were measured using tapping device. The feature extraction method based on the wavelet packet transform was used to extract features from the tapping sound. Comparing the feature of the tapping sound of healthy structure and defective structure, a feature index could be derived, which indicates the existence of defect inside the laminated composite structure. Using the feature index, the difference between the tapping sound data of the present specimens could be expressed as a single value.

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Joon Seok Hwang and Seung Jo Kim "Experimental verification of tapping sound analysis for the inspection of laminated composite structures", Proc. SPIE 4704, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Civil Infrastructures, (18 June 2002); https://doi.org/10.1117/12.470708

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