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18 April 2012 Numerical simulation of wave propagation in composite plates
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Composite structures are being extensively used in modern industrial applications due to their superior physical attributes, thus necessitating the need for structural health monitoring (SHM) systems to ensure their structural integrety. Guided wave (GW)-based methods are an obvious choice because of their ability to travel long distances through the thickness of the composite structures. In this work, local interaction simulation approach (LISA), a finite difference (FD)-based numerical method, is used to study the GW propagation characteristics in laminated composite plates. The iterative equations, which form the core of the LISA method, have been derived for orthotropic materials with in-plane rotation. Simulation results for uni-ply and quasi-isotropic graphite/epoxy laminates are used to demonstrate the capabilities of the advanced equations.
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Kalyan S. Nadella and Carlos E. S. Cesnik "Numerical simulation of wave propagation in composite plates", Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 83480L (18 April 2012); doi: 10.1117/12.915239;

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