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View article: Simulation of displacement rate effect on tensile rock failure using a phase-field fracture approach
Simulation of displacement rate effect on tensile rock failure using a phase-field fracture approach Open
The tensile strength of brittle rocks is commonly determined experimentally using the Brazilian test (splitting tensile strength test). For spatial and temporal upscaling of these experimental results, numerical methods are necessary to pr…
View article: GeoVis: Developing an immersive educational tool using Unreal Engine 5
GeoVis: Developing an immersive educational tool using Unreal Engine 5 Open
Fieldwork is an essential part of geoscience education, offering hands-on experience in observing and analyzing geological formations. However, participation in fieldwork is often limited by logistical, physical or financial constraints, e…
View article: Interlaboratory comparison of testing hydraulic, elastic, and failure properties in compression: lessons learned
Interlaboratory comparison of testing hydraulic, elastic, and failure properties in compression: lessons learned Open
Many geoscientific problems require us to exploit synergies of experimental and numerical approaches, which in turn lead to questions regarding the significance of experimental details for validation of numerical codes. We report results o…
View article: An example of digital field training for a diversity-friendly (and pandemic-proof) field education in geoengineering disciplines
An example of digital field training for a diversity-friendly (and pandemic-proof) field education in geoengineering disciplines Open
Geological field training and site inspections are important components of the education in geological and civil engineering and associated disciplines. However, field training is not inclusive, does not consider students’ family situation…
View article: Comparison of different methods to characterise the abrasivity potential and mechanical properties of carbonates with respect to its relevance for practical purposes in excavation technologies
Comparison of different methods to characterise the abrasivity potential and mechanical properties of carbonates with respect to its relevance for practical purposes in excavation technologies Open
The characterisation of the abrasivity potential of carbonates plays an important role for drilling-based excavation technologies, for example in tunneling or geothermal exploration. Although carbonates are known to have a rather low abras…
View article: Experimental investigation of the effect of thermal cycling on the thermomechanical properties of three rock varieties for high temperature thermal energy storage
Experimental investigation of the effect of thermal cycling on the thermomechanical properties of three rock varieties for high temperature thermal energy storage Open
During the past years “rock batteries” have become increasingly relevant for the storage of renewable energy sources, such as wind and solar energy, because of their economic and ecological advantages with respect to previously more common…
View article: Effect of sloppy sample preparation on results from uniaxial compressive strength tests
Effect of sloppy sample preparation on results from uniaxial compressive strength tests Open
The requirements on sample geometry for strength tests are specified in standards and recommendations such as those provided by ASTM, ISRM and DGGT. Various circumstances may lead to deviations from these specifications, e.g., the nature o…
View article: Experimental investigations on the temperature and strain-rate dependence of failure and friction criteria for a porous sandstone
Experimental investigations on the temperature and strain-rate dependence of failure and friction criteria for a porous sandstone Open
<p>Understanding the deformation-related thermomechanical state of reservoir rocks under in-situ conditions is essential for modelling the stress distribution and stability of subsurface structures, for example associated with afters…
View article: Digital rock physics and laboratory considerations on a high-porosity volcanic rock
Digital rock physics and laboratory considerations on a high-porosity volcanic rock Open
<p>Microtomographic imaging techniques and advanced numerical simulations are combined by digital rock physics (DRP) to obtain effective physical material properties. The numerical results are typically used to complement laboratory …
View article: Determining P- and S-wave velocities and Q-values from single ultrasound transmission measurements performed on cylindrical rock samples: it&#8217;s possible, when&#8230;
Determining P- and S-wave velocities and Q-values from single ultrasound transmission measurements performed on cylindrical rock samples: it’s possible, when… Open
<p>Determining elastic wave velocities and intrinsic attenuation of cylindrical rock samples by transmission of ultrasound signals appears to be a simple experimental task, which is performed routinely in a range of geoscientific and…
View article: Digital rock physics and laboratory considerations on a high-porosity volcanic rock: micro-XRCT data sets
Digital rock physics and laboratory considerations on a high-porosity volcanic rock: micro-XRCT data sets Open
Reticulite (high-porosity volcanic rock) is a pyroclastic rock formed during intense Hawaiian fountaining events. The honeycombed network of bubbles is supported by glassy threads and forms a structure with a porosity of more than 80 %. It…
View article: Relations between hydraulic properties and ultrasonic velocities during brittle failure of a low-porosity sandstone in laboratory experiments
Relations between hydraulic properties and ultrasonic velocities during brittle failure of a low-porosity sandstone in laboratory experiments Open
We continuously monitored hydraulic properties and ultrasonic P-wave velocity during triaxial compression of Wilkeson sandstone samples with an initial total porosity of about 9.5 per cent to elucidate the microstructural evolution and its…
View article: Digital carbonate rock physics
Digital carbonate rock physics Open
Modern estimation of rock properties combines imaging with advanced numerical simulations, an approach known as digital rock physics (DRP). In this paper we suggest a specific segmentation procedure of X-ray micro-computed tomography data …
View article: Digital Carbonate Rock Physics
Digital Carbonate Rock Physics Open
Modern estimation of rock properties combines imaging with advanced numerical simulations, an approach known as Digital Rock Physics (DRP). In this paper we suggest a specific segmentation procedure of X-Ray micro-Computed Tomography data …