.... In this study, we developed a first-of-its kind triaxial cell that allows one to apply electrical current, with temperature and pore pressure data collected during the joule heating process of a Berea Sandstone rock specimen. We investigated the relationships between pore fluid composition, pore pressure...

... pressure bar (SHPB) technique. The test results demonstrate the strain rate dependence of dynamic mechanical properties of both dry and water-saturated granite rock specimens. The presence of water lowers the dynamic compressive strength and elastic modulus of granite rock specimens. The dynamic increase...

... geomechanics specimen engineering reservoir characterization geological subdiscipline amplitude rock mechanic shear crack classification mining science acoustic emission international journal investigation emission ae count rock type igneous rock ae signal frequency rock specimen tunnel...

... effective in determining the applied stresses, our results indicate that the DRA and SMM methods were more precise and consistent. INTRODUCTION The Kaiser effect is a phenomenon observed in rock specimens when a uniaxial cyclic loading is applied in a laboratory. Acoustic emission (AE) activity begins...

... was studied using the Split Hopkinson Pressure Bar testing system. The Incident and Transmitted bars were modeled by the finite element method while the Brazilian rock specimen was simulated using a Bonded Particle Model (BPM). The bars were assumed to behave elastically while the simulated specimen could...

... to their behavior under saturated conditions. Yet, in the field, the rock may be below the water table and thus, it may be saturated. The objective of this study is to find the magnitude of the pore pressure needed for full saturation of a rock specimen. It is part of a larger project to determine the geophysical...

... experiment relaxation evolution ae event specimen stress level rock specimen deformation ARMA21 1965 Laboratory Investigation of Stress Relaxation in Brittle Rocks Using Acoustic Emission and Digital Image Correlation Zafar, Sana Colorado School of Mines, Golden, Colorado, USA Hedayat, Ahmadreza...

... of rock strength were described first. Then, the new test method in which alternating loading rates and cyclic loading are combined was proposed to investigate the loading-rate dependence of a complete stress-strain curve from a single rock specimen. The test results of Tage tuff showed that the stress...

... ABSTRACT: Several damage processes are associated with the loading of intact rock specimens including closure of existing micro-cracks, initiation of cracks, and finally development of cracks. Ultrasonic imaging techniques have proven to be very successful in providing relatively high...

... confinement rock specimen stress-strain curve deformation strength Rock mechanics sandstone dependence ARMA 19 1612 Dynamic Behaviors of Sandstone under True Triaxial Confinements: Triaxial Hopkinson Bar Tests Kai Liu and Qianbing Zhang Monash University, Melboourne, VIC 3800, Australia Copyright...

...) constitutive models. Laboratory experiments were performed on a cylindrical granodiorite rock specimen retrieved from a well at a depth of 5561.5 ft in Patua geothermal field in Northern Nevada. In this study, Autolab 1500 (a high-pressure/temperature fully servo-controlled triaxial instrument) was used...

.... Reservoir Characterization waterflooding novel true triaxial apparatus anisotropic stress condition hydraulic fracturing borehole MPa rock specimen injectivity enhanced recovery Simulation specimen Injection Rate reservoir geomechanics stress condition propagation Water Injectivity Upstream...

... correlation specimen type iii extreme value distribution Upstream Oil & Gas Gaussian distribution rock strength random model reservoir geomechanics material property extreme value distribution spatial correlation factor rock specimen Reservoir Characterization spatial correlation correlated...

... ABSTRACT: Acoustic emission (AE) were measured during an triaxial n test of a cylindrical salt rock specimen (diameter 150 mm, length 300 mm) from the Asse salt mine in Germany. In order to study the failure processes under dilatant loading conditions we analyze the microscopic formation...

... on the magnitude of confining stress. 1. INTRODUCTION Upstream Oil & Gas international journal Engineering porosity mesozoic water-rich sandstone threshold Reservoir Characterization freeze-thaw test rock specimen mechanics deterioration side length sandstone metals & mining MPa...

... section 10 8 creep test linear parallel contact model international journal PFC model Burger numerical model specimen rock specimen reservoir geomechanics modeling particle salt rock laboratory creep behavior contact model ARMA 17-28 Micromechanical Modeling of Impact of Temperature...

... unsatisfactorily control in brittle rock UCS testing. The study here could give a better understanding on rock compression testing and corresponding machine design. reservoir geomechanics displacement loading platen rock specimen Upstream Oil & Gas Mining Science inclination compression...

... ABSTRACT: This study introduces a method for determining Mode II dynamic fracture toughness using short-core-in-compression(SCC) rock specimens. The SCC specimens which have two notches are loaded dynamically by split Hopkinson pressure bar apparatus. A pulse shaping technique with copper...

... specimen(45mm dia × 90mm height of sandstone)and sheared using rock triaxial test system to obtained true strength characteristics viz. shear parameters and modulus of elasticity. The paper contains comparison of shear parameters and modulus of elasticity of rock specimens with varying circular opening...

... geomechanics loading compression high pressure testing machine true triaxial testing machine Rock Testing rock specimen principal stress ARMA 16-PAPER255 Historical developments of true triaxial testing machines challenges and improvements Peretyatko, A. Colorado School of Mines, Golden, CO, U.S...