This paper discusses the damping capabilities of polymer materials with mechanical characteristics which vary through the tickness. The case studied is that of a beam coated with a singel layer of this material, which can be classified as a free layer damping coating. A simple mechanical model of the system is proposed, toghether with a suitable modelling of the gradient material. Simulation results based on realistic case are presented for different types of distribution through the thickness and their damping performance is assessed.
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