ABSTRACT
The main parameter of energy dispersion in a material is the dissipation factor, ψ, which is the ratio of specific energy losses, ΔW, in a loading cycle to the amplitude value of the specific elastic energy, W. In cases when the energy losses, ΔW, are quadratic forms with respect to the stresses, the dissipation factor does not depend on the stress amplitude. At the same time, its values vary if the relation between normal and shear stresses varies, i.e., if the stress state type changes. Let us consider the effect of the stress state type on the relative energy dissipation of the unidirectional material.
