Features of Propagation of the SV-Polarized Normal Waves in the Composite Materials Made of Carbon Fiber

Based on analyzing results of the existing works, the paper demonstrates that the method of simulating motion of the SV-polarized normal waves using the classical theory of deformation appears promising in simulating their propagation in the layered polymer composite materials, as well as in studying the effect of discontinuities in such materials on the considered waves’ parameters. A model was created to analyze specifics of the described waves’ propagation in the polymer composite materials based on the carbon fiber. Formulas were obtained to calculate the amplitude coefficients for the motion equations to take into account acoustic characteristics of the polymer composite material layers and make it possible to calculate the displacement components or the energy distribution at any point in the layered medium. Phase velocity values were determined, and dispersion curves were constructed for various modes of the SV-polarized normal waves. Influence of the material layered structure on attenuation of those waves was considered, and the principle of correcting the formulas for calculating the attenuation coefficients taking into account the number of layers and their acoustic properties was outlined. Phase velocity values of the SV-polarized normal waves was experimentally verified on the sample of polymer composite materials confirming correctness of the simulation approaches