A Study on the Dependence of Resonance Frequency on the Thickness of Anisotropic Composites with Long Conductive Fibers

The resonant frequency of long conductive fibers embedded in an anisotropic composite as a function of layer thickness is investigated both numerically and experimentally. An empirical law is suggested to fit the results obtained. The law involves a critical thickness value, below which the layer can no longer be treated as a bulk material for a fiber of given length and thickness. The values of the critical thickness were found from numerical results for two particular composites.