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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Fracturing behaviors of flawed granite induced by dynamic loadings: A study based on DIP and PFC
https://orcid.org/0000-0003-2365-0885
AbstractThis study explored the dynamic behaviors and fracturing mechanisms of flawed granite under split‐Hopkinson pressure bar testing, focusing on factors like grain size and flaw dimensions. By means of digital image processing and the discrete element method, Particle Flow Code 2D (PFC2D) models were constructed based on real granite samples, effectively overcoming the limitations of prior studies that mainly relied on randomized parameters. The results illustrate that the crack distribution of granite is significantly influenced by grain size and flaw dimensions. Tension cracks predominate and mineral boundaries, such as between feldspar and quartz, become primary crack sites. Both flaw length and width critically affect the crack density, distribution, and dynamic strength of granite. Specifically, dynamic strength tends to decrease with the enlargement of flaws and increase with an increase in flaw angles up to 90°.
Highlights This research uses digital image processing and the discrete element method to accurately create granite models, capturing their authentic mineral content and spatial distributions. This study explores the mechanical properties and fracture mechanisms of granite subjected to dynamic loadings, highlighting critical factors including grain size, and the orientation and size of flaws. Analysis of correlation coefficients between various factors offers in‐depth insights into their individual and combined impact on the behaviors of granite under dynamic conditions.
Fracturing behaviors of flawed granite induced by dynamic loadings: A study based on DIP and PFC
https://orcid.org/0000-0003-2365-0885
AbstractThis study explored the dynamic behaviors and fracturing mechanisms of flawed granite under split‐Hopkinson pressure bar testing, focusing on factors like grain size and flaw dimensions. By means of digital image processing and the discrete element method, Particle Flow Code 2D (PFC2D) models were constructed based on real granite samples, effectively overcoming the limitations of prior studies that mainly relied on randomized parameters. The results illustrate that the crack distribution of granite is significantly influenced by grain size and flaw dimensions. Tension cracks predominate and mineral boundaries, such as between feldspar and quartz, become primary crack sites. Both flaw length and width critically affect the crack density, distribution, and dynamic strength of granite. Specifically, dynamic strength tends to decrease with the enlargement of flaws and increase with an increase in flaw angles up to 90°.
Highlights This research uses digital image processing and the discrete element method to accurately create granite models, capturing their authentic mineral content and spatial distributions. This study explores the mechanical properties and fracture mechanisms of granite subjected to dynamic loadings, highlighting critical factors including grain size, and the orientation and size of flaws. Analysis of correlation coefficients between various factors offers in‐depth insights into their individual and combined impact on the behaviors of granite under dynamic conditions.
Fracturing behaviors of flawed granite induced by dynamic loadings: A study based on DIP and PFC
https://orcid.org/0000-0003-2365-0885
AbstractThis study explored the dynamic behaviors and fracturing mechanisms of flawed granite under split‐Hopkinson pressure bar testing, focusing on factors like grain size and flaw dimensions. By means of digital image processing and the discrete element method, Particle Flow Code 2D (PFC2D) models were constructed based on real granite samples, effectively overcoming the limitations of prior studies that mainly relied on randomized parameters. The results illustrate that the crack distribution of granite is significantly influenced by grain size and flaw dimensions. Tension cracks predominate and mineral boundaries, such as between feldspar and quartz, become primary crack sites. Both flaw length and width critically affect the crack density, distribution, and dynamic strength of granite. Specifically, dynamic strength tends to decrease with the enlargement of flaws and increase with an increase in flaw angles up to 90°.
Highlights This research uses digital image processing and the discrete element method to accurately create granite models, capturing their authentic mineral content and spatial distributions. This study explores the mechanical properties and fracture mechanisms of granite subjected to dynamic loadings, highlighting critical factors including grain size, and the orientation and size of flaws. Analysis of correlation coefficients between various factors offers in‐depth insights into their individual and combined impact on the behaviors of granite under dynamic conditions.
Fracturing behaviors of flawed granite induced by dynamic loadings: A study based on DIP and PFC
Deep Underground Science and Engineering
Wang, Xiao (Autor:in) / Sun, Wenbin (Autor:in) / He, Changdi (Autor:in) / Yuan, Wei (Autor:in) / Sarfarazi, Vahab (Autor:in) / Wang, Haozheng (Autor:in)
06.05.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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