Insights From a Combined Analysis of Acoustic Emission Signals for Water-Bearing Rocks in Four-Point Bending Tests: Failure Mode Classification and Strength Degradation
ROCK MECHANICS AND ROCK ENGINEERING(2023)
摘要
Highlights Water-bearing causes substantial reductions in the tensile strength of rocks under four-point bending. There is an obvious correlation between dominant frequency bands of acoustic emission waveform and failure modes. The water-bearing effect on rock tensile strength can be characterized by the failure components associated with it. Tensile strength degradation of rocks under four-point bending can be attributed to friction weakening and fracture energy reduction.
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关键词
Acoustic emission,Combined analysis,Water bearing,Failure mode classification,Strength degradation,Four-point bending tests
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