Dynamic Mechanical Properties and Failure Characteristics of Sandstone with Pre-Flaws Parallel to the Loading Direction

Li, Ziyun; Zhu, Yunhui; Song, Qianghui; Wang, Peiyong; Liu, Dongyan

doi:10.3390/su15043587

Cited by 6 publications

(3 citation statements)

References 44 publications

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“…The mechanisms of strain rate effects are discussed [3]. In terms of the influence of different shock pressures and fracture on the mechanical properties of rocks, Li et al [4] conducted dynamic shock testing. The loading speed grows exponentially with the dynamic intensity.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Dynamic Mechanical Properties and Energy Consumption of Fractured Sandstone under Dynamic–Static Combination Conditions

Ping,

Xu,

et al. 2024

Applied Sciences

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Under dynamic loads, such as blasting, excavation, or quarrying, rocks with fissures are the first to sustain damage, leading to instability in the engineering rock mass. To investigate the kinetic properties of fractured rocks, fractured coal mine sandstone specimens underwent impact compression tests using a dynamic–static combination SHPB (split Hopkinson pressure bar) test device at different loading rates under combined dynamic and static conditions. The damage characteristics of the specimens were analyzed from an energy point of view. The results show that under the dynamic and static combined condition, when five impact loading air pressures are used for loading at different impact rates, the trends of the dynamic stress–strain curves of prefabricated fissured rock samples under various impact pressures were discovered to be similar and were mainly categorized into three main stages of elasticity, yield, and destruction; the specimen’s dynamic compressive strength increases according to a power function relationship; as the average strain rate increases, the dynamic strain increases linearly and the dynamic modulus of elasticity increases in a quadratic relationship, all of which show a significant strain rate effect. The incident energy is a power function of the loading rate. The reflected, transmitted, and absorbed energies by the sample increase with the incident energy. The degree of the sandstone specimen fragmentation gradually grows with increasing impact loading rate and incident energy, as evidenced by a decrease in the scale of the fragments. The absorbed energy in the sample is mainly used for the deformation damage of the rock, and the more intense the fragmentation of the specimen, the more absorbed energy is required.

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Section: Introductionmentioning

confidence: 99%

Analysis of Dynamic Mechanical Properties and Energy Consumption of Fractured Sandstone under Dynamic–Static Combination Conditions

Ping,

Xu,

et al. 2024

Applied Sciences

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“…Physical and chemical properties are also used to characterize rocks. They constitute an extensive range of properties, including hardness (Mosh scale), cleavage, density, porosity, water absorption, fire resistance, low-temperature resistance, permeability, heat conductivity, electric conductance, magneticity and many more [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Application of Rock Abrasiveness and Rock Abrasivity Test Methods—A Review

Mucha

2023

Sustainability

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The processes of rock formation have long been known and widely described in many literature items worldwide. Due to the multitude of occurring rock types, they are distinguished by various properties. For many decades, scientists worldwide have been determining various parameters by which these properties of rocks can be described. Tests of these parameters are commonly performed in many research centres worldwide. Depending on the scientific discipline, some researchers focus on geological properties (colour, structure, texture, chemical composition). Other researchers focus on physical and mechanical properties: hardness, density, strength properties, compactness, etc. Among them, abrasiveness and abrasivity can also be distinguished. In terms of nomenclature, they are very similar and often confused. Even within the academic community, researchers often use the names interchangeably, which needs to be corrected. This article aims to explain the difference between rock abrasiveness and rock abrasivity, classify methods for their assessment and present their practical applications in the mining and construction industry. It should be emphasized here that abrasiveness is determined when we are interested in the abrasive wear of natural stone and abrasivity when we are interested in the wear of the tool with which we cut the stone. The purpose of this article is also to let the reader decide whether to carry out an abrasiveness or abrasivity test and which method to use.

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“…These characteristics, including fatigue strength, susceptibility to cracking, and axial load behaviour, as well as the failure mechanisms of sandstones have been studied by numerous authors, some of whom are: Z. Song et al [28], Bagde and Petroš [29][30][31], Song, H et al [32], Cai et al [33], Y. Zhao et al [34], Vaneghi et al [35], Yang et al [36][37][38], G. Zhao et al [39], Liu et al [40], Ray et al [41], Feng et al [42], Figarska-Warchoł et al [43], and Li et al [44]. The abrasiveness of sandstones, on the other hand, has been addressed in papers [45÷55].…”

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confidence: 99%

Effect of the Mineralogical Composition of Sandstones on the Wear of Mining Machinery Components

Wieczorek,

Jonczy,

Filipowicz

et al. 2024

Preprint

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The paper provides and comments on the results of studies of the effect of sandstone-based abrasives and quartz sand alone on the wear of martensitic surfaces of wear-resistant steels. The wear process was examined on a ring-on-ring test rig seeking to determine the mass decrement parameter which characterised wear. The tests were conducted for three sandstone varieties: Carboniferous, Permian, and Cretaceous, and they made it possible to determine that the most intense process of deterioration of wear-resistant steels took place in the presence of quartz sand grain, while less intense wear was observed in the case of sandstone-based abrasives. The mass decrement values established in the presence of the sandstones in question did not differ significantly between individual sandstone varieties. Based on a surface damage analysis, the basic damage mechanism was found to be micro-scratching, however, with regard to the sandstones examined, it was also determined that individual grains could be pressed into surface irregularities, as well as that films of soft hematite cement developed in the Permian sandstone and that inclusions of carbonaceous matter were formed in the Carboniferous sandstone. With reference to the wear process observations, a wear model was described for the surface of the steels examined in the presence of sandstone-based abrasives.

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Dynamic Mechanical Properties and Failure Characteristics of Sandstone with Pre-Flaws Parallel to the Loading Direction

Cited by 6 publications

References 44 publications

Analysis of Dynamic Mechanical Properties and Energy Consumption of Fractured Sandstone under Dynamic–Static Combination Conditions

Analysis of Dynamic Mechanical Properties and Energy Consumption of Fractured Sandstone under Dynamic–Static Combination Conditions

Application of Rock Abrasiveness and Rock Abrasivity Test Methods—A Review

Effect of the Mineralogical Composition of Sandstones on the Wear of Mining Machinery Components

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