In-situ synchrotron characterisation of fracture initiation and propagation in shales during indentation

Abstract

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Probing Constitutive Models of Bohus Granite with In Situ Spherical Indentation and Digital Volume Correlation

“…The authors showed that the strain levels beneath the indentor exceeded the yield strain of dentin. The fracture development in shales was reported very recently [15]. The cracking pattern was evidenced thanks to strain fields derived from measured displacement fields.…”

“…In the afore-mentioned studies, various DVC schemes were considered. Most of the analyses were performed with so-called local DVC [11,12,16,19,17,18,20,14,15], in which independent sub-volumes were registered. FE-based DVC was also considered, registration residuals and strain fields were utilized to characterize cracks [10,22,13,21].…”

Synchrotron X-ray Studies of the Structural and Functional Hierarchies in Mineralised Human Dental Enamel: A State-of-the-Art Review

“…Tomography can be used for studies of mechanical properties, with the visualisation of modification in the 3D structure and propagation of the crack during indentation in static and in situ experiments [ 626 , 627 , 628 , 629 ]. Mechanical analysis has been applied in 2D, using digital image correlation on radiography images with time to characterise changes during the tooth restoration [ 318 ].…”

Main Control Factors of Fracture Propagation in Reservoir: A Review

“…The surface roughness of fractures is also greater. 130 The chemical composition of fracturing fluids can affect the dissolution and corrosion properties of rocks. Unlike water-based fracturing fluids, under high pressure, CO 2 can extract hydrocarbons from tight oil reservoir rocks, dissolve the rock matrix and minerals, 134 large water consumption and the generation of a significant amount of wastewater may lead to regional seismicity, water lock reactions, and damage to formations 135 air prone to generating fracture branching and larger surface roughness 53 poor carrying capacity of proppants 136 LPG no fluid loss, resulting in better effective fractures 136 generates a large amount of flammable propane N 2 -based can enhance the connectivity of pore and fracture networks, can quickly clean without impacting the environment, L-N 2 has a large compression coefficient and strong expansion ability, and has high elasticity 137−139 poor carrying capacity of proppants, not suitable for use in plastic formations 140 CO 2 -based good permeability, low viscosity, generates finer and more complex fracture networks, increases methane and hydrocarbon production, and favorable for carbon sequestration 77,141 poor carrying capacity of proppants, leading to significant loss and leakage, strict requirements for fracturing equipment, preparation and transportation of carbon dioxide 31 and migrate, which can effectively alter the pore structure 131 (Figure 18).…”

“…The degree of fracture bending is greater than in hydraulic fracturing, and the morphology of fractures tends to have a three-dimensional spatial distribution. The surface roughness of fractures is also greater . The chemical composition of fracturing fluids can affect the dissolution and corrosion properties of rocks.…”