Structural damage assessment of MAV flapping wings using DIC-wavelet technique

Vivek Khare; David Kumar; Sudhir Kamle

doi:10.1117/12.2559758

22 April 2020 Structural damage assessment of MAV flapping wings using DIC-wavelet technique

Vivek Khare, David Kumar, Sudhir Kamle

Proceedings Volume 11380, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIV; 113800O (2020) https://doi.org/10.1117/12.2559758
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

DIC-Wavelet technique for vibration based structural damage identification in dragonfly wing structure is reported. A bio-mimicked dragonfly wing, stiffened and unstiffened plate made of MWCNT-PP nanocomposite wing skin and Carbon-fibre epoxy composite stiffener are developed. Modal frequencies and vibration mode shapes of intact samples are obtained using well known Digital image correlation technique. Artificial cracks are created in plates and wings at stigma and nodus. Wavelet analysis is applied on displacement data obtained at discretized wing surface using DIC technique. Symlet function of order 4 is selected as mother wavelet function. The spikes in amplitude of wavelet coefficients corresponds to the damage region. Effect of scaling function in wavelet transform is studied for efficient identification of damages. The study indicates that the proposed DIC-Wavelet technique is efficient in predicting the damage zones in plates and wings.

Conference Presentation

Citation Download Citation

Vivek Khare, David Kumar, and Sudhir Kamle "Structural damage assessment of MAV flapping wings using DIC-wavelet technique", Proc. SPIE 11380, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIV, 113800O (22 April 2020); https://doi.org/10.1117/12.2559758

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