... loading. The resistance and capacitance of sandstone specimens at different frequencies (10 2 -10 8 Hz) were obtained. Damage variables of sandstone based on EIS measurements were defined by the saddle resistivity in the Nyquist diagram before and after the cyclic loading. The experimental results...

... Abstract Laboratory tests were performed to explore the effects of frequency on the deformation property of rock salt subjected to cyclic loading under confining stress condition. A two-stage (transient and steady) evolution law of axial cumulative strain was obtained through cyclic stress...

... Abstract The size of rock fragments depends on the nature of the loading applied the strength of the minerals and the texture of the rock. Research in the literature demonstrates that there is a distinct difference in the rock fracturing process for static and cyclic loading. The tensile...

... Reservoir Characterization relation energy characteristic rheological mode Upstream Oil & Gas energy distribution thermal energy evaluation loading amplitude temperature change test specimen characteristic mechanical energy frequency cyclic loading specimen dynamic loading...

...). If the stress applied is below the yield strength, deformation will be partly recovered with remaining residual deformation upon removal of stress. Unless the material is elastically unretarded, the deformation of the specimen by cyclic loading will be cumulative. The residual deformation is considered u...

... ABSTRACT: The Kaiser effect of Shirahama sandstone was investigated using the three-dimensional source locations of the acoustic emissions (AEs) detected during two kinds of uniaxial cyclic loading in elastic stage. In the experiments AEs were detected using eight transducers in order...

...SUMMARY The effects of cyclic loading on soft saturated porous rock have been investigated. A typical phenomenon is so called cyc1i~ fatigue in which a material fails at a stress level lower than its static strength. Deformation, strength andbehavlour of pore pressure under quasi-static and cyclic...