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Elastic-Microplastic Transitions in Rocks during Low-Intensity Wave Propagation
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This study conducted field and laboratory acoustic experiments to investigate nonstandard microplastic inelasticity in loam and siltstone, detecting unusual inelastic phenomena during low-intensity wave propagation. The research identified elastic-microplastic transitions in rocks through high-resolution stress-time seismic and acoustic recordings.
The field and laboratory acoustic experiments have been conducted for the study of nonstandard (microplastic) inelasticity in loam and siltstone. New data was obtained thanks to seismic/acoustic recording in the form of "the stresstime" with the microsecond resolution. Unusual inelastic manifestations represented in the form of stress plateau, the stress drop and the steepness decrease on wave front complicate wave form. The short-term discrepancy of the upward and downward stress course in some time interval is characterized as micro-hysteresis effect. The microplastic process influences the wave propagation, transforms its form and dynamic parameters. The observed effects depend on the magnitude of the applied dynamic stress. The discrete inelasticity plays an important part not only in wave dynamics but can exerts influence on global deformation processes in the Earth.
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