... engineering frequency graph ultrasonic non-destructive digital indicating tester environmental science 833 amplitude geologist limestone crystallisation practice iop publishing iop conf theory procedure geotron instrument pundit Mechanics and Rock Engineering, from Theory to Practice IOP...

... of characteristic functions calculated from squared amplitudes. Waveform stacking and coherence techniques are adapted to detect and locate AE signals for massive datasets with extremely high sampling. We significantly increase the detection rate in comparison to trigger mode routines. Most detection concentrated...

... circulation system with three wells in the target reservoir, after stimulations in PX-2 and PX-1. Upstream Oil & Gas Reservoir Characterization stress ratio stimulation geothermal reservoir px-2 well amplitude Injection Rate hydraulic stimulation orientation MPa stimulation data...

... Characterization Engineering drag tool effective approach excavator crack propagation loading Upstream Oil & Gas hard rock rock fatigue reduction metals & mining strength University Rock mechanics amplitude static loading Erarslan Rock Mechanics and Rock Engineering: From the Past...

... Reservoir Characterization Engineering frequency Upstream Oil & Gas reservoir geomechanics thermally Rock mechanics vulnerability mamshit dda model displacement Earthquake historic monument DDA time step size masonry structure Keystone numerical analysis amplitude...

... topography. The rock slope is subjected to several harmonic signals with variable frequency and amplitude, and the slope response is evaluated. 1 INTRODUCTION Subduction of the Nazca plate under the South American plate is responsible of numerous earthquakes due to the stress accumulation and relief...

... to check the response of quarries beneath the underground quarries. Reservoir Characterization underground quarry Oya tuff stability Upstream Oil & Gas seismic response numerical analysis sinusoidal velocity wave quarry amplitude velocity wave oya tuff underground quarry plane view...

... metals & mining strength Reservoir Characterization Engineering damage variable rock fatigue damage Wellbore Design cyclic loading amplitude rock material deformation Adelaide loading loading condition fatigue damage fatigue life Upstream Oil & Gas rock fatigue behavior...

... reservoir geomechanics splitting tensile strength variation tensile failure behavior Brazilian splitting test Engineering acoustic emission ringdown count room temperature cumulative ringdown count Upstream Oil & Gas microscopic structure sandstone amplitude sub-zero temperature tensile...

... on carbide metal and polycrystalline diamond cutting tools with geometrically defined cutting edges. The ultrasonic frequency was maintained at 20 kHz. Different oscillation amplitudes up to 25 µm were applied to reduce process forces in comparison to the conventional machining. The observation...

... a brief theoretical description on ground vibrations sources with emphasis on rockfalls, while typical equations on the estimation of ground vibration amplitude and signal attenuation are also provided. Section 3 presents the experimental setup and the algorithm developed for rockfall event iden...

... and composed of numerous alternating movements with different frequencies and amplitudes move in cycles (Sashourin 2001). Upstream Oil & Gas kazchrome donskoy ore mining Reservoir Characterization frequency movement process metals & mining structural geology displacement amplitude...

... preparation and less material requirement for testing. In this study, the specifications of Brisbane tuff sample geometry have been selected according to the suggestions of International Society of Rock Mechanics (ISRM). The main aim of this research is to evaluate the effect of amplitude variations...

... in dimensionless variables, like roughness slope and there is a lack of information in these models.A new original limit equilibrium model of strain energies that integrates linear parameters as roughness amplitude is introduced. It solves most problems of the classical models because it uses energies...

... amplitude failure pattern Rock Engineering and Rock Mechanics: Structures in and on Rock Masses Alejano, Perucho, Olalla & Jiménez (Eds) © 2014 Taylor & Francis Group, London, 978-1-138-00149-7 Failure behaviour and acoustic emission pattern of slate and mica schist in uniaxial loading N. Slatalla & M...

... frequency Oscillation amplitude evaluation Artificial Intelligence anchor length input parameter application optimization problem geomechanics coefficient amplitude material parameter foundation plate Upstream Oil & Gas Rock mechanics roof settlement tensile stress...

.... The indirect tensile strength of Brisbane tuff was reduced from the static value of 10.8 to 7MPa as a result of Type I cyclic loading. Comparing the results of the sinusoidal, Type I and II cyclic loading tests, the maximum BITS reduction was obtained with the highest amplitude in Type I and smallest amplitude...

... magnitudes of vibration at any site that is to be protected. An important factor of dealing with vibrations and their effects is the definition of three categories, which are (according to Sarsby, 2000): Reservoir Characterization correlation amplitude expression Upstream Oil & Gas...

... into the calculation the stochastic character of the input parameters. In the first example the stochastic character of shear strength characteristics of soils is considered. The second example takes into account the stochastic character of the basic parameters of dynamic load (frequency and amplitude of the dynamic...

... level and constant amplitude, termed sinusoidal cyclic loading, and (b) cyclic loading with increasing mean level and constant amplitude, termed increasing cyclic loading. The fracture toughness response to cyclic loading was found to be different from that under static loading in terms of the ultimate...