Abstract
We developed a novel measurement system to directly visually observe the sliding behavior of rocks inside a triaxial test apparatus. The proposed visual measurement system consists of a steel housing that contains a commercially available digital camera. A series of triaxial compression tests was conducted to visually observe the progressive sliding behavior of precut samples and to measure the evolution of the strain and displacement fields near an artificial joint, using the digital image correlation method. The recorded video frames and their associated digital image correlation results allow a better understanding of the effect of confining pressure on the sliding mode of precut joint asperities. The implementation of the proposed measurement system is simple, safe, and inexpensive, and has the potential to become widely used as a new measurement system because it can be installed into existing triaxial test equipment without modification.
Highlights
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A new measurement system is proposed for observing the sliding behavior of rock-like materials from the inside of the pressure vessel of a triaxial test apparatus.
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The measurement system is simple, safe, and inexpensive, and consists of a steel housing containing a digital camera.
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We successfully observed the effect of confining pressure on the sliding mode of the precut joint asperity.
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Asahina, D., Takemura, T., Endo, T. et al. A New System for the Direct Visual Observation and Measurement of the Sliding Behavior of Rock-Like Materials Under Triaxial Compression. Rock Mech Rock Eng 56, 6027–6043 (2023). https://doi.org/10.1007/s00603-023-03391-3
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DOI: https://doi.org/10.1007/s00603-023-03391-3