Abstract
The effects of fast and slow dynamics in acoustic resonators from rock and metal samples from the D16 microcrystalline aluminum alloy are studied using resonance ultrasonic spectroscopy. Before the experiment, residual shear strains were artificially created in the metal samples. A decrease in the elasticity modulus in the fast dynamics process has been revealed in resonators from rock and the D16 alloy with residual strains. Based on an analysis of the experimental results, the following conclusion was drawn: the experimentally observed slow dynamics effect cannot be explained by thermoelastic effects alone. The slow dynamics effect is to a great extent related to metastable states of the defect structure the latter passes through to due to the force action (dynamic or static) applied to the sample. After its removal, the defect structure slowly relaxes to its equilibrium state.
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Original Russian Text © A.I. Korobov, N.I. Odina, D.M. Mekhedov, 2013, published in Akusticheskii Zhurnal, 2013, Vol. 59, No. 4, pp. 438–444.
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Korobov, A.I., Odina, N.I. & Mekhedov, D.M. Effect of slow dynamics on elastic properties of materials with residual and shear strains. Acoust. Phys. 59, 387–392 (2013). https://doi.org/10.1134/S106377101304009X
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DOI: https://doi.org/10.1134/S106377101304009X