5 April 2017 Guided wave attenuation in composite materials
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In this paper problem of guided wave damping in composite materials is investigated. Material damping is estimated from experimental measurements based on energy of propagating guided waves. Simply Rayleigh damping is introduced into the model in the form of damping matrix proportional to the mass matrix. The numerical model is based on Spectral Element Method (SEM). Numerical model includes the piezoelectric transducer and bond layer between actuator and the host structure. In this paper each ply of composite laminate is simulated by separate layer consisting of 3D brick spectral elements. Numerical results are experimentally validated using Scanning Laser Doppler Vibrometry (SLDV). Guided waves are excited using piezoelectric transducer and registered using non-contact device – the laser vibrometer. Validation is based on signals gathered in dispersed points as well as on full wavefield measurements. The full wavefield measurements are conducted on dense grid of points. In this paper results for simple carbon fiber reinforced polymer are presented. Paper presents result for composite structure for damaged case. Investigated damage is in the form of delamination.
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Tomasz Wandowski, Tomasz Wandowski, Pawel Kudela, Pawel Kudela, Pawel Malinowski, Pawel Malinowski, Wieslaw Ostachowicz, Wieslaw Ostachowicz, } "Guided wave attenuation in composite materials", Proc. SPIE 10170, Health Monitoring of Structural and Biological Systems 2017, 101701D (5 April 2017); doi: 10.1117/12.2258594; https://doi.org/10.1117/12.2258594

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