Instability, Chaos, and “Memory” in Acoustic-Wave–Crack Interaction
- 19 December 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 88 (1), 014303
- https://doi.org/10.1103/PhysRevLett.88.014303
Abstract
A new class of nonlinear acoustic phenomena has been observed for acoustic wave interactions with cracked defects in solids. Parametric modulation of crack stiffness results in fractional acoustic subharmonics, wave instability, and generation of chaotic noiselike acoustic excitations. Acoustic-wave impact on a crack is shown to exhibit amplitude hysteresis and storage for parametric and nonlinear acoustic effects. The measured storage time amounts to several hours and is believed to be due to a long-term relaxation of thermally induced microstrain within a crack area.Keywords
This publication has 5 references indexed in Scilit:
- Universal Slow Dynamics in Granular SolidsPhysical Review Letters, 2000
- Nonlinear Mesoscopic Elasticity: Evidence for a New Class of MaterialsPhysics Today, 1999
- Ultrasonics of non-linear contacts: propagation, reflection and NDE-applicationsUltrasonics, 1998
- Nonlinearities in ActionPublished by Springer Science and Business Media LLC ,1992
- Fine structure of fractional harmonic phononsPhysics Letters A, 1967