Modelling Rock Fracturing Processes
A Fracture Mechanics Approach Using FRACOD
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19 Result(s)
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Article
Open AccessPDERL: an accurate and fast algorithm with a novel perspective on solving the old viewshed analysis problem
Viewshed analysis based on the regular grid digital elevation model (DEM) is one of the basic functions of geographic information systems. Traditional viewshed analysis algorithms are mainly carried out in a g...
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Article
Nanoparticles Study on the Indosinian **aomei Shear Zone in the Hainan Island, China: Implication to Developmental Stage and Formation Mechanism of Nanoparticles in a Fault Zone
Nanoparticles are widely observed in the natural shear zone and experimental slip faults, which can lubricate the fault and significantly reduce the friction coefficient during seismic slip. But it is still no...
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Book
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Chapter
Hydro-Mechanical Coupling
This chapter provide the theoretical formulations and numerical procedures involved in hydro-mechanical coupling function in FRACOD.
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Chapter
Iteration Process in FRACOD
This chapter describe the iteration process used in FRACOD. Boundary element methods (including DDM) are implicit numerical methods. This means that the numerical calculation will only provide a final solution...
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Chapter
Simulation of Multiple Region System
Rock mass may have different properties in different regions of its structure. An example is a shaft where three different regions (concrete lining, Excavation Disturbed Zone (EDZ), and in situ rock mass) must...
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Chapter
Sequential Excavation Function
FRACOD as a boundary element code works best for problems with predefined boundaries. If the model boundary is not completely fixed at the beginning, this creates difficulties for boundary element modelling. A...
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Chapter
Introduction
Understanding the long-term behaviour of a rock mass and the coupled hydro-thermal-mechanical processes is crucial for geological radioactive waste disposal, geothermal, mining, LNG underground storage, and CO2 g...
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Chapter
Anisotropic Rock Strength Function
In rock engineering, anisotropic rock masses are often encountered and cannot be simplified as an isotropic problem in numerical models. Hence an anisotropic function in the numerical model is required.
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Chapter
Modelling Time Dependency
This chapter describes the theories of sub-critical crack growth and numerical procedures implemented in FRACOD. Classical fracture mechanics postulates that a fracture tip with a stress intensity equal to the...
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Chapter
Solving Gravitational Problems
Many practical rock-engineering problems involve gravitational stresses. Rock slope stability and shallow tunnel stability are two examples where the gravity stresses cannot simply be ignored or simplified as ...
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Chapter
Introduction to Rock Fracture Mechanics
This chapter provides the basic theories and principles behind rock fracture mechanics. It starts with introducing the Griffith flaws and energy balance theory, which is the foundation of the modern fracture m...
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Chapter
Rock Properties for FRACOD Modelling
Modelling of rock fracturing problems with FRACOD requires some physical and mechanical rock properties not commonly used in traditional rock mechanics. This chapter gives a short description and references to...
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Chapter
Numerical Method
The FRACOD code is based on Boundary Element Method principles. It utilizes the Displacement Discontinuity Method (DDM), one of the three commonly used boundary element methods. In the FRACOD code, a fracture ...
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Chapter
FRACOD Verification Tests
This chapter describe several verification tests using FRACOD to model some simple problems from single fracture propagation to coupled fracturing process. The tests cases are designed to demonstrate the funct...
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Chapter
Thermo-Mechanical Coupling
This chapter provide the theoretical formulations and numerical procedures involved in thermo-mechanical coupling function in FRACOD. Coupling between thermal loading and mechanical process can occur either wh...
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Chapter
Application Case Studies
This chapter provides five representative case studies employing FRACOD, including 1) Borehole Breakout; 2) Tunnel EDZ; 3) LNG Underground Cavern; 4) Pillar Spalling; and 4) UCS and Brazilian Test. These cases...
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Article
Open AccessEffect of Ni addition on the glass-forming ability and soft-magnetic properties of FeNiBPNb metallic glasses
The effect of Ni addition on the glass-forming ability (GFA) and soft-magnetic properties of an (Fe1−x Ni x )75.5B14.5P7Nb3 (x=0−0.6) alloy system were in...
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Article
Refinement of the crystal structure for a new mineral —antimonselite
The crystal structure of a new mineral of the stibnite group, Sb2Se3, has been determined. The cell constants, obtained by least-squares calculation from direct θ-value’s measurements on the diffractometer are: a...
