2010 | OriginalPaper | Buchkapitel
Wave Propagation in Damaged Materials Using a New Generalized Continuum Model
verfasst von : Vladimir I. Erofeyev, Elena A. Nikitina, Alla V. Sharabanova
Erschienen in: Mechanics of Generalized Continua
Verlag: Springer New York
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An approach is proposed that allows formulating self-consistent problem that includes equations of the material’s dynamics and conditions of its damage. It is shown that damage in the material introduces a frequency-dependent damping and dispersion of the phase velocity of ultrasonic acoustic waves that allows estimating damage using the acoustic method. Applied field of deformations leads to the accumulation of damage. A kinetic equation is obtained, whose analysis shows that damage grows exponentially. The parameters of the system for which accumulation of damage can be considered as linear are estimated.