Suchergebnisse
Suchergebnisse:
14. Mai 2024 · Geologist Overview. A geologist is a scientist who studies the Earth's structure, composition, and history. They use a variety of techniques to study rocks, minerals, and fossils to understand the processes that have shaped the planet. Geologists also study the Earth's resources, such as oil, gas, and minerals, and assess their potential for ...
25. Mai 2024 · Residual stresses refer to those stresses from sources other than contemporary tectonic forces that are locked within the rock formation. These stresses could develop and be stored within the rock during the cooling process of rock formation, metamorphism periods, previous tectonic activities, and other deformation phenomena. If relieved, by any excavation activity, for example, they can cause ...
11. Mai 2024 · Crack propagation of the rock specimen containing a central closed flaw at different end friction coefficients (µ) under uniaxial compression and biaxial unloading confining pressure has been modeled under different loading conditions in this study employing a strength-based localized maximum stress (SLMS) criterion. The contact problem at the ends of specimens is solved via an augmented ...
8. Mai 2024 · The information of fractures in rock mass is an essential indicator to evaluate the quality of rock mass. It is precise and efficient to obtain information of fractures by computer vision (CV)-based fracture detection technologies. However, rock masses in practical engineering always exhibit complex fractures with messy edges, shadows, and uneven rock surfaces. These factors negatively impact ...
17. Mai 2024 · This study employs 3D printing and Digital Image Correlation technology to investigate rock-like specimens with nonpenetrating and nonpersistent rough joints under uniaxial compression. It analyzes crack propagation and elucidates the mechanical mechanisms by summarizing surface displacement features. Findings reveal the influence of nonpenetrating joint number, penetration depth, and ...
14. Mai 2024 · It was found that the strength of all types of rock increases with geological age, however saturation of these rocks with water causes their structural weakening, which is especially noticeable in the case of sandstone and claystone. In the case of mudstone, due to their structure, the reduction of strength after saturation with water is not so significantly noticeable. In the second part of ...
25. Mai 2024 · Rock materials exhibit different elastic moduli under tension and compression, making them typical bi-modulus materials. Few testing methods can measure both tensile and compressive moduli (Et and Ec) of such materials simultaneously, and with their reliability not systematically validated. Taking blue and red sand rocks as the example, this study performed a series of uniaxial compression ...
