Vibro-Acoustic Modulation Based Damage Identification in a Composite Skin-Stiffener Structure

T.H. Ooijevaar 1 R. Loendersloot 1 M.D. Rogge 2 R. Akkerman 1 T. Tinga 1
1 University of Twente [Netherlands]
2 LaRC - NASA Langley Research Center [Hampton]
Abstract : The vibro-acoustic modulation method is applied to a composite skin-stiffener structure to investigate the possibilities to utilise this method for damage identification in terms of detection, localisation and damage quantification. The research comprises a theoretical part and an experimental part. An impact load is applied to the skin-stiffener structure, resulting in a delamination underneath the stiffener. The structure is interrogated with a low frequency pump excitation and a high frequency carrier excitation. The analysis of the response in a frequency band around the carrier frequency is employed to assess the damage identification capabilities and to gain a better understanding of the modulations occurring and the underlying physical phenomena. Though vibro-acoustic is shown to be a sensitive method for damage identification, the complexity of the damage, combined with a high modal density, complicate the understanding of the relation between the physical phenomena and the modulations occurring.
Keywords : Interaction between wave/field and structure/material Feature extraction Aerospace SHM applications
Type de document :
Communication dans un congrès
Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014
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T.H. Ooijevaar, R. Loendersloot, M.D. Rogge, R. Akkerman, T. Tinga. Vibro-Acoustic Modulation Based Damage Identification in a Composite Skin-Stiffener Structure. Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014. 〈hal-01020394〉

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