Abstract:
The features of using the acoustic method for accurately determining the concentration
of components in two-component composite materials by measuring the speed of sound of long
waves are described in this paper. Furthermore, explicit expressions for the volume concentrations of
the matrix material and reinforcing particles or fibers of composite materials obtained by acoustic
measurements are found. In addition, the advantages, features, and limits of the application of
acoustic quality control of composite materials of various compositions and purposes are described.
It is established that the methods for determining the concentration of components are valid for
all types of composite materials, which are conveniently considered as phonon crystals. These
results make it possible to more accurately determine or select a measuring cell for the experimental
determination of the speed of sound. The mathematical problem to be solved is a purely exact
inverse problem.
