Natural defects, such as joints, structural surfaces and voids, significantly affect the mechanical properties and fracture modes of rock mass. Hidden fissures are widely distributed in magmatic rock, while their influences on the mechanical properties and the cracking mechanism are still unclear. Laboratory tests were conducted on prefabricating hidden-fissured rock-like specimens, as well as intact specimens and close-fissured specimens as a comparison. The real-time digital image correlation technology and acoustic emission monitoring technology were synchronously adopted to capture both the external and internal cracking process. The results show that the hidden fissures can weaken the uniaxial compression strength, while the deterioration effect of hidden fissures is weaker than closed fissures due to the internal cohesion among fissure internal particles. What's more, the initiation behavior of the α = 90° hidden-fissured specimen is different from that of β = 90° closed-fissured specimen. Finally, the cracking mechanism of hidden-fissured specimens was revealed by analyzing the RA-AF relationship. The failure of the close-fissured specimens is mainly the tensile-shear mixed fracture mode, while the failure of the hidden-fissured specimens is mainly the tensile fracture mode and supplemented by the shear. The experimental results contribute to the understanding of cracking properties in hidden-fissured rock.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10356807 | PMC |
| http://dx.doi.org/10.1038/s41598-023-38285-5 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Middle ear biofilm and sudden deafness - a light and transmission electron microscopy study.
Front Neurol
December 2024
Department of Surgical Sciences, Otorhinolaryngology and Head and Neck Surgery, Uppsala University, Uppsala, Sweden.
Background: There still exists controversy about whether the healthy human middle ear mucosa is sterile or if it may harbor a diverse microbiome. Considering the delicacy of the human round window membrane (RWM), different mechanisms may exist for avoiding inner ear pathogen invasion causing sensorineural deafness. We re-analyzed archival human RWMs using light and transmission electron microscopy after decalcification to determine if bacteria are present in clinically normal human middle ears.
View Article and Find Full Text PDFAnatomical distribution and clinical significance of translobar bronchi, arteries, and veins hidden in the interlobar fissure.
J Thorac Dis
February 2024
Department of Thoracic Surgery, Jiangsu Province Hospital, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Article Synopsis
- The study investigates the anatomical distribution of bronchi, arteries, and veins in incomplete interlobar fissures (IFs) to understand the risks during pulmonary surgeries, as their accidental transection can compromise lung function.
- Researchers analyzed 3D computed tomography data from patients who underwent pulmonary resections, categorizing translobar structures by origin and distribution.
- Findings revealed that incomplete IFs were most common in horizontal fissures, showing a significantly higher incidence of bronchovascular structures compared to complete IFs, and identified various subtypes of these structures relevant for surgical planning.
This study aimed to apply finite element analysis to evaluate the effects of pile materials with different elastic moduli and cement materials on the stress distribution between the remaining tooth tissue and cryptic fracture defects. A three-dimensional finite element model was established for 20 maxillary first molars with hidden fissures and mesial tongue-tip defects. Two levels of hidden cracks and three types of pile and adhesive materials were used in the design.
View Article and Find Full Text PDFLong-distance migration law of radon in overburden of abandoned goaf during coal spontaneous combustion.
J Environ Radioact
December 2023
College of Mining Engineering, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, China.
The surface isotope radon measurement method (SIRMM) is widely used in fire source detection in abandoned mines. However, studies on the long-distance migration of radon during coal spontaneous combustion are lacking, which hinders the further popularization of this technology in coal fire prevention and control. For this reason, the migration law of radon in overlying strata in fire areas was studied through experiments and numerical simulation.
View Article and Find Full Text PDFMechanical properties and crack evolution characteristics of fractured rock with hidden fissures.
Sci Rep
July 2023
College of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing, 400074, China.
Natural defects, such as joints, structural surfaces and voids, significantly affect the mechanical properties and fracture modes of rock mass. Hidden fissures are widely distributed in magmatic rock, while their influences on the mechanical properties and the cracking mechanism are still unclear. Laboratory tests were conducted on prefabricating hidden-fissured rock-like specimens, as well as intact specimens and close-fissured specimens as a comparison.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!