Finite element simulation of lamb waves using piezoelectric actuators in composite plate structures

Patel, Bhavana S S and Ashwin, U and Raja, S and Shetty, Kiran Kumar (2012) Finite element simulation of lamb waves using piezoelectric actuators in composite plate structures. In: National Conference on contemporary Civil Engineering Research and Practices, April 20-21, M.I.T, Manipal.

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In the present work, Finite Element simulation of lamb waves using in-situ piezoelectric actuators has been studied. The study becomes important to understand the phenomenon of lamb wave propagation and reflection in isotropic and composite plates, its interaction with damages, and for appropriate placement of lamb wave generating/ sensing piezoelectric transducers. The study starts with generation of dispersion curves, which is a function of product of excitation frequency and plate thickness. Then two standard rectangular plates with PZT actuator are modeled using Finite Element and the actuation is simulated using equivalent nodal forces. The actuator is excited for specific time period with Amplitude Modulated (AM) signal. The responses measured at different locations on the plate are validated with the dispersion curves. These studies are carried out on healthy and damaged plate specimens, and damage is identified based on the changes in amplitude and time of flight of the response wave.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Structural Health Monitoring, lamb waves, dispersion curves, piezoelectric transducer
Subjects: Engineering > MIT Manipal > Civil Engineering
Depositing User: MIT Library
Date Deposited: 04 Sep 2013 06:43
Last Modified: 04 Sep 2013 06:43

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