Numerous acoustic experiments demonstrate that in media with a complex structure, such as rock, the elastic response is characterized by (i) a decrease in the material modulus during wave excitation, typically with a hysteresis (fast nonlinear dynamics), and (ii) long-time recovery to the original equilibrium modulus (slow dynamics). Here, a physical model of a granular material with an inter-grain contact potential having one or more metastable wells suggested earlier is significantly developed to include a non-logarithmic stage and the joint action of excitation and recovery. Theoretical results are compared with our experimental data.
|Original language||English (US)|
|Journal||Proceedings of Meetings on Acoustics|
|State||Published - 2018|
|Event||21st International Symposium on Nonlinear Acoustics, ISNA 2018 - Santa Fe, United States|
Duration: Jul 9 2018 → Jul 13 2018
All Science Journal Classification (ASJC) codes
- Acoustics and Ultrasonics