... etc. and rock parameters such as rock strength and brittleness etc. However, this research just focuses on the behaviour of the rock-tool interaction zone under various cyclic loading types. Research results showed the developed Fracture Process Zone (FPZ) under cyclic loading is much bigger than...

... ABSTRACT: Series of uniaxial compression tests combining constant strain rate and four patterns of cyclic loading were carried out on Kimachi sandstone to clarify the timing of rock failure. It was found that rock failure timing was random in triangular, reverse triangular and small amplitude...

... in experimental tests difficult to investigate the effect of cyclic loading on rock fatigue behavior. On the other hand, numerical modelling is a feasible option to simulate rock fatigue damage. We simulated rock fatigue damage in three-dimensional finite element analysis (FEA) and introduced a new damage...

... and change of chevron notch angles on the fracture toughness of rocks under both static and cyclic loading. The cyclic loading was applied in three different levels of amplitudes, 10%, 20% and 30% of the static ultimate loading (SUL). In addition, three different chevron crack angles 30?, 45? and 60? have...

..., due to the number of micro-cracks manifested by AE hits 89 Figure 1. Point of inflexion in the second loading cycle indicating maximum stress, m in uniaxial cyclic loading (After Lavrov, 2003). drastically increases as illustrated in Figure 1. Kaiser Effect (KE) is the manifestation of damage due...

...Rock Mechanics for Resources, Energy and Environment Kwas´niewski & ydz ba (eds) © 2013 Taylor & Francis Group, London, ISBN 978-1-138-00080-3 Effect of constant and varying mean stress levels of cyclic loading on the indirect tensile strength of rocks N. Erarslan Geotechnical Engineering Centre...

... Abstract: This study presents the results of laboratory diametrical compression tests performed on Brisbane tuff disc specimens to investigate their mode-I fracture tough-ness response to static and cyclic loading, as a function of the applied load. Fracture toughness (KIC) is an important...

... Abstract: A novel outcome of the research described is the observation of the effect of indirect tensile cyclic loading on the fracture toughness of rocks. The mode I fracture toughness (KIC) response to indirect tensile cyclic loading was found to be different from that under static loading...

...Rock Mechanics in Civil and Environmental Engineering Zhao, Labiouse, Dudt & Mathier (eds) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-58654-2 Rheological properties of rocks during vibration (cyclic loading) J. ancer V B-Technical University of Ostrava,Ostrava, the Czech Republic...

... Upstream Oil & Gas Tang mechanism Coalescence rock specimen loading cyclic loading Simulation specimen rock material reservoir geomechanics strength material property AE event numerical experiment model propagation stress level Eurock 2005 -Impact of Human Activity on the Geological...

... recollection specimen metals & mining axial stress stress memory utagawa Reservoir Characterization cyclic loading acoustic emission sandstone loading takeoff point Kaiser effect estimation Upstream Oil & Gas accuracy delay time Signature granite katsuyama stress level Eurock '96...

... Artificial Intelligence displacement three-dimensional extension Upstream Oil & Gas rock joint rock joint constitutive model cyclic loading extension loading shear stress shear behaviour solid waste management loading path asperity Amadei constitutive model saeb Rock Mech...

... lengths to the diameter of specimen. hydraulic fracturing Upstream Oil & Gas post-peak curve Peak Load cyclic loading fracture toughness specimen single-edge specimen crack length crack growth estimation calibration equation chevron specimen fracture process Ouchterlony load...