... ABSTRACT The tensile strength of crystalline rocks in Brazilian tests (BT) shows a more significant size dependency than the uniaxial compression strength in uniaxial compression tests (UCT), while the micro-mechanism is still unclear. This study seeks to elucidate the micro-mechanism...

... geomechanics jointed rock uniaxial compression geology specimen compression mechanism eng fracture behavior fissured rock wing crack coalescence compressive load failure mode geologist wellbore design reservoir characterization characteristic rock mech uniaxial loading static compressive...

... loading non-destructive stress measurement method inflection point maximum stress deformation geology australia government loading compression adelaide uniaxial compression in-situ stress karakus strain measurement ae method ARMA 23 0244 Evaluation of non-destructive stress measurement...

... in the uniaxial compressive strength (UCS) value of granite. However, the UCS value of granite undergoes a significant decline with increasing mica content. Additionally, the presence of quartz intensifies the brittleness of granite, while feldspar enhances the ductility of granite. In the isotropic model...

... involve testing cylindrical or disc-shaped specimens under uniaxial compression or diametrical loading. But, these stress conditions may not represent the actual stress state under which rock is subjected at depth. A true triaxial testing technique on cubed specimens are, therefore, preferred as it better...

... recently developed a new monitoring system for continuous measurement of displacement, acoustic emissions in addition to environmental parameters and utilized in uniaxial compression, Brazilian tensile and bending tests. It is shown that the new monitoring system can measure long-term responses without...

... ABSTRACT: A practical method determining five elastic constants of a transversely isotropic rock is proposed by the uniaxial compressive strength test and the Brazilian test using specimens from a single-orientation core. The indirect tensile strength of the Brazilian test can be obtained...

... are generally considered in most numerical simulation tests, and the accuracy of the micro parameters is difficult to ensure, resulting in low accuracy of the test results. In order to study the influence of micro parameters on the deformation and failure of specimens in uniaxial compression test, PFC2D...

... experimental program using an artificial material was carried out to systematically evaluate the effects of different parameters in rock testing under uniaxial compression. The parameters include the compression platen type, centering of the specimen, loading control method and rate, specimen size, cross...

... ABSTRACT: In the process of exploring the mechanical properties of deep strata, we find that the granite after heat treatment has a negative Poisson's ratio effect. Therefore, we carried out the microstructure test and uniaxial compression experiment of granite in Gonghe basin of Qinghai...

... coal uniaxial compression stimulation test mechanical property injection tensile strength 1. INTRODUCTION Coal Bed Methane (CBM) is a kind of promising energy. The air pollution and equipment corrosion can be reduced by using CBM because of its low sulfur content. At the same time, gas...

... the thermal treatment levels were higher than 300 °C. The variation of mechanical parameters under compression showed a transition from thermal hardening to thermal cracking at 300 °C. The uniaxial compressive strength and Young's modulus significantly decreased only when the thermal treatment levels were...

... reconstruction. The digital model is simulated using the software ABAQUS and the Drucker–Prager constitutive model via uniaxial compression. Results show that stress concentration usually occurs under axial load. The stress distribution law of elliptical pores is related to the inclination of the pores...

... wellbore integrity triaxial test strength indirect tensile cylindrical specimen uniaxial compression compression 1. INTRODUCTION Cemented Paste Backfill (CPB) is an engineered mixture of mill tailings (75 85% solids by weight), a hydraulic binder (2 9% by dry total paste weight) and mixing water...

... Characterization upper loading platen international journal failure process splitting nonuniform loading compression complete stress-strain curve Wellbore Design stress-strain curve Rock mechanics specimen uniaxial compression load train 1. INTRODUCTION Complete stress-strain curve of brittle rock...

... different temperature uniaxial compression application liquid nitrogen tensile strength 1. INTRODUCTION Hydraulic fracturing is necessary for the economic development of tight oil reservoirs. However, there will be a distinct production decline after a well has been produced for a few years after...

... degradation dilatation wellbore integrity Wellbore Design material response MPa loading condition strain rate fracture energy mechanisms-based fracture model single element mesh uniaxial compression fracture fluid modeling equation of state geological material permeability Zubelewicz...

... strength compression reservoir characterization end constraint uniaxial compression contact loading condition prism specimen stress-strain curve reservoir geomechanics rock specimen simulation peak strength constraint cylinder specimen post-peak behavior ideal loading condition...

... process of rocks containing single flaws and under uniaxial compression. The new contact model was first validated by using it to simulate the experimental cracking process of gypsum containing pre-existing single flaws at different inclination angles. Then the influence of flaw shape (length...

... Abstract A vast number of experimental and numerical studies have been performed in the literature to understand the fracturing process in brittle rocks under uniaxial compression; several types of cracks including tensile, shear, and combined tensile-shear have also been observed at the tip...