Abstract
When a Lamb wave propagates in a three dimensional (3D) domain, attenuation i.e. reduction in amplitude of the wave with distance of propagation is due to geometry and material. Experimental measurements of attenuation of a Lamb wave consist of both the effects of geometry and material as well. In the present work, a technique to estimate the attenuation due to material from combined attenuation (geometry and material) was proposed. The estimated material attenuation coefficient was then used in 3D numerical simulations of Lamb wave to capture the combined attenuation. The proposed technique was verified through numerical simulations followed by experimentally measured data on a composite laminate. Furthermore, the entire distance of propagation of a Lamb wave was classified into three regions based on attenuation characteristics.
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