Identification of material properties of multi-layered structures using laser Doppler vibrometry for the purposes of mechanical and biomedical engineering
Mikhail V. Golub1 *, Artem A. Eremin1, Olga V. Doroshenko1, Mikhail A. Arsenov1, Andreas Panayi2, Vladimir Emelianov2, Ilia Rumiantsev2, Olga A. Ermolenko1, Evgeny V. Glushkov1, Natalia V. Glushkova1;
1Institute for Mathematics, Mechanics and Informatics, Kuban State University, Krasnodar 350040, Russian Federation;
2Laboratory of Cyber Physical Systems, Skolkovo Institute of Science and Technology, the territory of the Skolkovo Innovation Center, Bolshoy Boulevard, 30, p.1, Moscow 121205, Russian Federation
Abstract
Ultrasonic elastic guided waves (EGWs) are used for various applications such as structural inspection or diagnostics in medicine. Since wave characteristics strongly depend on the elastic properties of the media, wave motion is used to probe the mechanical properties of composite materials and biological tissues. A technique for the evaluation of material properties of multi-layered structures employing experimental dispersion curves of EGWs acquired in a non-contact way with laser Doppler vibrometry (LDV) is presented and discussed in this study. To provide experimental verification of the methodology, several layered elastic specimens have been manufactured. Surface-mounted piezoelectric transducers are used for wave generation in these samples, and the corresponding surface motion has been captured with LDV in the form of B-scans. The matrix pencil method is used to extract the EGW dispersion characteristics propagating in laminates. The inverse problem is then solved using a technique based on the computation of the Fourier transform of the Green's matrix. The obtained results for material elastic properties identification are validated using synthetic data and via comparison with tensile tests for elastic materials. The presented technique is planned to be applied to material properties characterization of highly deformed soft layered laminates (tissues) considering pre-stretched specimens at various stretch ratios.
Speaker
Mikhail Golub
Kuban State University
Russian Federation
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