... Abstract According to the geometrical characteristics of triangular meshes, Triangular Mesh Split Model (TMSM) based on a finite element method is proposed to simulate cracks propagation of fractured rock. With TMSM, stress intensity factors at the tip of cracks are obtained by far-field...

...APPLICATION OF DISCRETE ELEMENT METHOD TO MODEL CRACK PROPAGATION Zhenyu Han, Dion Weatherley, and *Ruslan Puscasu Sustainable Minerals Institute, The University of Queensland Brisbane, Queensland, 4072, Australia (*Corresponding author: r.puscasu@uq.edu.au) Innovations in Applied and Theoretical...

... Characterization orientation energy consumption brittle material crack propagation indenter different orientation fracture Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0-415-80444-8 The effect of pick orientation on rock...

... in this study. It was shown that fracture toughness of granite was dependent on orientation of grain boundaries and water vapor pressure of the surrounding environment. Furthermore, crack propagation was discussed based on the images of fracture visualized within rock specimen by means of X-ray CT...

...Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0-415-80444-8 Simulating the failure mechanism of rock slopes (due to kinked and secondary cracks propagation) by a higher order displacement discontinuity method M. Fatehi Marji & M...

... SCB specimen particle specimen crack propagation hydraulic fracturing fracture toughness Fracture Toughness Testing clumped particle model strength input parameter experiment toughness metals & mining Simulation crack distribution Kimachi sandstone loading roller numerical...

... ABSTRACT The mechanism of crack initiation and propagation is studied by using rock-like modeling material. Rectangular prismatic specimens with an oblique central crack (a pre-existing flaw) are used in the experimental study. The crack propagation process is observed in the specimens under...

... reservoir geomechanics criterion prediction Diederich Upstream Oil & Gas transition Coalescence crack propagation Reservoir Characterization extreme end initiation high gsi rockmass rockmass behaviour GSI strength rockmass threshold competency scale unified procedure hoek...

... ABSTRACT In order to investigate the behavior of crack propagation in a rock material, a numerical modeling by DEM and fracture toughness testing are carried out. The paper firstly describes the numerical modeling, using the Particle Flow Code (PFC2D) for biaxial compression tests...

... bonding force plane Cundall simulation analysis particle discontinuity rock mass crack propagation friction plane rock slope gravity center analytical model distinct element method 3. Slopes, foundations and open pit mining 11th Congress of the International Society for Rock Mechanics...

... mechanism discontinuity progressive failure tensile propagation crack propagation rock bridge frayssine rock mass propagation 7. Safety evaluation and risk management 11th Congress of the International Society for Rock Mechanics Ribeiro e Sousa, Olalla & Grossmann (eds) © 2007 Taylor & Francis...

..., President of the ISRM for his kind words of introduction. hydraulic fracturing reservoir geomechanics Upstream Oil & Gas Einstein Artificial Intelligence underpressure resistance Coalescence Aristorena anhydrite mit geometric-mechanical model crack propagation mechanism Switzerland...

... with taking into account the crack propagation. The crack propagation and the dynamic stress field in rock are visualized and the effect of the initiation time error on rock fragmentation is concretely discussed. It is pointed out that the initiation time accuracy is a key factor to control the surface...

... ABSTRACT: A numerical approach is proposed to describe the mechanical phenomenon of wave scattering due to crack-propagation. This method is constructed by the combination of Betti's reciprocal principle and the discretization technique of the finite element method and then the effect of crack...

... fractures independently like those of the tensile mode. During the past few years, many attempts have been made to understand fracture initiation and to predict crack propagation accurately under various types of loadings. Some of the methods have proved successful in measuring the fracture parameters...

.... by the lattice energy in crystals). The fracture aspect is not "homogeneous", it is following one or more concrete surface(s). Fig.1 is showing the differences by a uniaxial compressive test specimen. The fracture mechanics, analyzing the crack opening and crack propagation is supposing also the traditionally...

.... The results show that the start of crack propagation is only influenced by statistical effects, that the range of stable crack propagation seems to be independent of size, and that the range of unstable crack propagation is affected by stored strain energy (which is a function of specimen size...