Numerical Modeling of Elastic Wave Propagation in Random Particulate Composites
Elastic wave propagation in a random particulate composite is a very complex phenomenon. In such a material, the application of ultrasonic nondestructive testing methods is difficult due to the multiple scattering processes, the strong backscattering from the aggregates, the frequency dependent attenuation and dispersion of the coherent wave fields and the mode conversions between pressure, shear and Rayleigh waves. Therefore, the interpretation of the received signals is complicated and the signal to noise ratio is low. In order to improve the applicability of pulse-echo and impact-echo testing methods and to optimize inverse reconstruction techniques, it is necessary to study the process of wave propagation systematically.
KeywordsRayleigh Wave Concrete Model Elastic Wave Propagation Head Wave Elliptical Cavity
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