High Amplitude Studies of Natural Dome Salt and Hydrostatically Pressed Salt

摘要

Techniques and results are described for obtaining the onset of nonlinearity of forced resonance vibrations in natural dome salt and hydrostatically pressed salt at ~500 Hz. The technique is centered on the use of an inertially loaded vibrating bar apparatus. The onset of nonlinearity was observed at ~10–6 strain. The attenuation (Q–1) was observed to increase while the resonant frequency decreased. Concomitant with the nonlinear behavior were asymmetries in the resonance wave and the observation of a memory effect when the samples were subjected to a large number of cycles.