ABSTRACT
Cyclic loading of solids even under small strain amplitudes is accomplished by energy damping. This phenomenon is usually referred to as internal friction or imperfect elasticity. The energy dissipation factor ψ (also called the relative energy dissipation) may be considered as the parameter describing a system’s internal friction. The dissipation factor for isotropic bodies is the ratio of energy losses, ΔW, in a loading cycle to the amplitude value of the elastic potential energy in a cycle, W: () ψ = Δ W / W https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780203757529/60c8358b-6811-4d21-b0be-8c0ed388508f/content/eq1.tif"/>
