Experimental Investigation of the Dynamic Tensile Properties of Naturally Saturated Rocks Using the Coupled Static–Dynamic Flattened Brazilian Disc Method

Liu, Xinying; Dai, Feng; Liu, Yi; Pei, Pengda; Yan, Zelin

doi:10.3390/en14164784

Cited by 15 publications

(7 citation statements)

References 45 publications

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“…The findings demonstrated a notable correlation between prestress and the sandstone dynamic tensile strength. Additionally, the research shed light on the microscopic fracture mechanisms observed in both dry and saturated sandstone 40 . Liu conducted dynamic load analyses on sandstone samples with diverse levels of water saturation and subjected to different microwave radiation.…”

Section: Introductionmentioning

confidence: 98%

Influence of dynamic load and water on energy accumulation and dissipation in sandstone

Yang,

Xing,

Fang

et al. 2023

Sci Rep

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In various engineering projects such as mineral extraction, hydropower resource utilization, railway construction, and geological hazard mitigation, rock engineering is often encountered. Furthermore, dynamic loads and moisture content exert notable influence on the energy transformation processes within rocks. Yet, the specific interplay of dynamic loading and water's impact on the energy conversion mechanism within the sandstone remains unexplored. To address this gap, this study conducted impact loading experiments on sandstone, elucidating the rock’s mechanical response under these conditions and unraveling the underlying energy conversion mechanisms. It was observed that the strength of sandstone exhibits a direct correlation with impact velocity. Moreover, employing energy calculation principles, we established a connection between moisture content and the sandstone’s internal energy conversion properties. The study also delved into the microscopic fracture mechanisms within the sandstone, ultimately concluding that both water content and dynamic loading have a significant impact on these microscopic fracture mechanisms.

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Section: Introductionmentioning

confidence: 98%

Influence of dynamic load and water on energy accumulation and dissipation in sandstone

Yang,

Xing,

Fang

et al. 2023

Sci Rep

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“…In fact, the SHPB experimental technology has been widely used in the study of the dynamic mechanical properties of concrete materials [32] due to its good performance when testing dynamic mechanical properties at strain rates in the range of 10 1 ~10 4 s −1 [33]. Moreover, with the development of SHPB technology, researchers have combined high-speed photography technology [34], coupled static-dynamic loading [35], Digital Image Correlation (DIC) [36] and other technologies with the traditional SHPB experimental system, greatly expanding the use scenarios of SHPB test systems. In addition, DIC technology has attracted the attention of researchers because of the advantage in terms of the strain field of the measured specimens being able to be measured directly using non-contact methods during the process of performing mechanical experiments [37].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effect of Limestone Powder Content on the Dynamic and Static Mechanical Properties of Seawater Coral Aggregate Concrete (SCAC)

Jiang

Zhu

et al. 2023

Materials

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The development of island construction concrete can serve as a basis for the development and utilization of island resources. Complying with the principle of using local materials to configure seawater coral aggregate concrete (SCAC) that is able to meet the requirements of island and reef engineering construction could effectively shorten the construction period and cost of island and reef engineering construction. In this paper, quasi-static mechanical experiments and dynamic mechanical experiments were carried out on SCAC with different limestone powder contents. High-speed photography technology and Digital Image Correlation (DIC) were used to monitor the dynamic failure process and strain field of SCAC, and the influence of limestone powder content on the dynamic and static mechanical properties of SCAC was investigated. The results showed that, when the limestone powder content was 20% and 16%, the quasi-static compressive strength and quasi-static tensile strength exhibited the best improvement. Additionally, with increasing limestone powder content, the dynamic tensile strength of SCAC first showed and increasing trend and then a decreasing trend, reaching its maximum value when the limestone powder content was 16%. Moreover, the maximum strain value of SCAC with the same limestone powder content increased with increasing strain rate grade, showing an obvious effect on strain rate.

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“…Sandstone's fracture penetration rate clearly varies with varying water contents, based on Liu's study of the impact of water content on the damage features of the sandstone [29]. Natural and saturated sandstones were tested with tensile tests by Liu, who discovered that the crack propagation in sandstones began in the center [30]. Qi has carried out tensile tests on the ring sample with different saturation degrees and different temperatures, indicating that the water temperature is different, and the degree of sandstone rupture is different [31].…”

Section: Introductionmentioning

confidence: 99%

Study on Mechanical Behavior and Mechanism of Sandstone under the Coupling Effect of Water Content and Dynamic Load

Chen

Ting

2023

Processes

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In the process of underground engineering construction, rock mass often faces the dual influence of dynamic load disturbance and groundwater, it is therefore essential to investigate the mechanical response of the rock mass under the coupling effect of dynamic load disturbance and water content. In this paper, dynamic load impact tests were carried out on sandstone with bullet velocities of 5 m/s, 10 m/s, and 15 m/s and water content of 0, 0.3, 0.6, and 0.9, and the mechanical behavior and mechanism response of water content to sandstone were investigated. The research findings indicate that this study has made significant contributions in quantifying the along grain and trans-grain fractures of microcracks. It has explored the influence of water content and dynamic loading on the strength mechanism of sandstone. It was discovered that the dynamic loading and water content significantly affect the ratio of along grain and trans-grain fractures, thereby influencing the dynamic behavior of sandstone. The findings suggest a negative association between rock strength and water content and that its peak strength rises as the bullet velocity rises. The fracture characteristics of rock are influenced by water content and bullet velocity. The sample’s fracture degree increases with an increase in water content, its particle size distribution map is evident, and there is a positive relation between bullet velocity and fractal dimension. The energy conversion mechanism of the rock is influenced by the water content, as the bullet velocity increases, the absorbed energy density of the rock becomes higher. Furthermore, the correlation between the absorbed energy intensity and density and its fractal dimension is quantified. It is found that energy density and strength are positively correlated. The greater the fractal dimension, the higher the energy density absorbed.

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Experimental Investigation of the Dynamic Tensile Properties of Naturally Saturated Rocks Using the Coupled Static–Dynamic Flattened Brazilian Disc Method

Cited by 15 publications

References 45 publications

Influence of dynamic load and water on energy accumulation and dissipation in sandstone

Influence of dynamic load and water on energy accumulation and dissipation in sandstone

Experimental Study on the Effect of Limestone Powder Content on the Dynamic and Static Mechanical Properties of Seawater Coral Aggregate Concrete (SCAC)

Study on Mechanical Behavior and Mechanism of Sandstone under the Coupling Effect of Water Content and Dynamic Load

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