Influence of coupled water and thermal treatments on the fracture characteristics of a typical sandstone DOI Creative Commons
Yi Luo,

Haohong Zhong,

Li Ren

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: May 17, 2024

Abstract Understanding the fracture behavior of rock after coupled water and thermal environment is important for many geotechnical projects. This study examines influence treatments on toughness characteristics a typical sandstone under mode I II loading conditions. Notched deep beam (NDB) specimens were utilized subjected to soaking at various temperatures (23 °C, 60 99 °C). The experimental results indicate significant reduction in both values, with reductions ranging from 15.4% 13.2% 26.1% 8.9% respectively. As increase, slightly rising trend observed within examined temperature range. Sandstone displayed brittle lower temperatures. For specimens, an increase ductility was evident higher temperatures, while ductile less pronounced specimens. Based Maximum Tangential Stress (MTS) criterion Generalized (GMTS) criterion, predicted values process zone (FPZ) discussed. show that GMTS MTS criteria exhibit inaccuracies predicting treated different However, which incorporates T -stress, demonstrates smaller errors compared criterion. shows radius r 0 not constant calculation requires further theoretical study.

Language: Английский

Study on the Deterioration Mechanisms of Basalt with Fractures Under Freeze-Thaw Cycling DOI Creative Commons
Kunlun He,

Qingzhi Wang,

Jiankun Liu

et al.

Research in Cold and Arid Regions, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

Citations

0
Fracture Mechanical Properties of Double-Edge Cracked Flattened Brazilian Disc Samples Under Compressive Loads DOI Open Access

Wen Hua,

Wenyu Zhang,

Shiming Dong

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(4), P. 850 - 850

Published: Feb. 15, 2025

The shear-based fracturing of deep fractured rocks under compression-shear loading is one the most prevalent failure modes due to existence in situ stress. In order study shear fracture mechanical properties rocks, a double-edge cracked flattened Brazilian disc (DCFBD) sample was developed by introducing two platforms into (DCBD). Extensive finite element analyses were conducted on DCFBD samples determine stress intensity factors (SIFs) and T-stress. A comprehensive dataset SIFs T-stress obtained, which provided accurate descriptions tests performed this specimen. Furthermore, effects load distribution angle γ, dimensionless crack length α, inclination θ YI, YII, T* discussed. It showed that effect γ YI YII can be disregarded when α ≥ 0.60 ≤ 20°. However, it should considered for larger angles. Moreover, experimentally validated with appropriate lengths angles achieve (true mode II) fracture, as demonstrated through series these specimens. results will advance development rock testing technology.

Language: Английский

Citations

0
Comprehensive study on thermal cycling effect on dolomite fracture behavior under three loading modes (I, I/II, II): Experimental and analytical methods DOI
Mahmoud Alneasan, Abdel Kareem Alzo’ubi,

Gonzalo Zambrano Narvaez

et al.

Theoretical and Applied Fracture Mechanics, Journal Year: 2025, Volume and Issue: unknown, P. 104963 - 104963

Published: April 1, 2025

Language: Английский

Citations

0
Study on Characteristics of Failure and Energy Evolution of Different Moisture-Containing Soft Rocks under Cyclic Disturbance Loading DOI Open Access
Xuewen Cao, Xuhui Tang,

Lugen Chen

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(8), P. 1770 - 1770

Published: April 12, 2024

During the coal mining process in soft rock mines with abundant water, mass undergoes cyclic loading and unloading at low frequencies due to factors such as excavation. To investigate mechanical characteristics energy evolution laws of different water-containing masses under disturbance loading, a creep dynamic impact system was employed conduct experiments on various rocks (0.00%, 1.74%, 3.48%, 5.21%, 6.95%, 8.69%). A comparative analysis conducted patterns input density, elastic dissipated damage variables during process. The results indicate that influence peak strength specimens, except for fully saturated samples, is generally increased varying degrees. Weakness effects modulus were observed samples 6.95% water content while strengthening others. density mostly stored form strain within adapt external loads first 100 cycles, almost identical trends indicators. Damage calculated using maximum method, revealing samples. From an perspective, these experimental elucidate fatigue loading.

Language: Английский

Citations

3
Influence of coupled water and thermal treatments on the fracture characteristics of a typical sandstone DOI Creative Commons
Yi Luo,

Haohong Zhong,

Li Ren

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: May 17, 2024

Abstract Understanding the fracture behavior of rock after coupled water and thermal environment is important for many geotechnical projects. This study examines influence treatments on toughness characteristics a typical sandstone under mode I II loading conditions. Notched deep beam (NDB) specimens were utilized subjected to soaking at various temperatures (23 °C, 60 99 °C). The experimental results indicate significant reduction in both values, with reductions ranging from 15.4% 13.2% 26.1% 8.9% respectively. As increase, slightly rising trend observed within examined temperature range. Sandstone displayed brittle lower temperatures. For specimens, an increase ductility was evident higher temperatures, while ductile less pronounced specimens. Based Maximum Tangential Stress (MTS) criterion Generalized (GMTS) criterion, predicted values process zone (FPZ) discussed. show that GMTS MTS criteria exhibit inaccuracies predicting treated different However, which incorporates T -stress, demonstrates smaller errors compared criterion. shows radius r 0 not constant calculation requires further theoretical study.

Language: Английский

Citations

1