Experimental Study of the Microstructural Characteristics of the Surfaces and Volumes of Granite Samples

Victorov, S. D.; Кочанов, А. Н.; Pachezhertsev, A. A.

doi:10.3103/s1062873818070444

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…It should be noted that some results using these experimental methods are published in Refs. [12][13][14]. In this publication, an attempt is made to generalize them with an emphasis on structural features and the role of heterogeneity in the process of crack development at different scale levels.…”

Section: Methodsmentioning

confidence: 99%

Experimental Study of Dynamic Fracture in Structurally Heterogeneous Materials on the Example of Rocks

Kochanov

2023

Rev. Adv. Mater. Technol.

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The development of micro- and macrocracks in rocks under dynamic influence is considered. The important role of structural features of rocks on this process is noted. Based on ultrasound studies, it is shown that rock samples, as a rule, are heterogeneous and differ in the distribution of longitudinal wave velocity values in certain local regions. The initial heterogeneity determines the spatial development of the microcrack development area under external influence. Using optical microscopy and computer X-ray microtomography, the parameters of microcracks were determined on the example of granite after exposure. Experimental studies using optical, electron and scanning confocal laser microscopy were performed to evaluate the parameters of microcracks in granite. Structural features of rocks affect the nature of the development, trajectory and speed of crack propagation.

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Section: Methodsmentioning

confidence: 99%

Experimental Study of Dynamic Fracture in Structurally Heterogeneous Materials on the Example of Rocks

Kochanov

2023

Rev. Adv. Mater. Technol.

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“…samples with similar structural features, and therefore similar values of their main deformation-strength characteristics. The obvious connection between the structural damage of geomaterials and the values of their strength and deformation parameters determines the use of non-destructive diagnostic methods to solve this problem, allowing, at least indirectly, to assess the degree of defects [10,11].…”

Section: Research Objectsmentioning

confidence: 99%

Experimental studies of the deformation characteristics of mudstones under high temperature exposure

Blokhin,

Zakorshmennyi,

Minaev

et al. 2024

J. Phys.: Conf. Ser.

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The article presents the results of laboratory thermomechanical tests of argillite samples. It has been confirmed that the deformation-strength properties of the studied type of geomaterials undergo significant changes under high-temperature influences. Features of changes in the values of deformations of argillite samples at various stages of heating were revealed. It is shown that the research results can be used in modeling thermomechanical processes occurring during underground gasification of coal in a reaction channel, to predict the development of deformation of the host rocks of an underground gas generator.

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“…Поскольку известняк относится к горным породам, обладающим высокой степенью неоднородности, для получения качественных и обоснованных результатов при выполнении описываемых исследований была создана выборка образцов с близкими значениями физико-механических параметров и схожими структурными особенностями. Для этого был проведен комплекс предварительных испытаний, включающий как стандартные методы определения физико-механических свойств горных пород, так и методы, основанные на интроскопических способах исследования, например растровую электронную микроскопию и лазерную ультразвуковую диагностику [4,14,24].…”

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Experimental study of thermomechanical effects in water-saturated limestones during their deformation

Blokhin¹,

Ivanov²,

Dudchenko³

2021

PMI

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Stability control of elements of stone constructions of various structures is a prerequisite for their safe operation. The use of modern methods of non-destructive diagnostics of the stress-strain state of such constructions is an effective, and in many cases the only way to control it. Studies of thermal radiation accompanying the processes of solid bodies deformation allowed to justify and develop a method that allows to obtain non-contact information about changes in the stress-strain state in various types of geomaterials, including limestones. However, studies of the water saturation influence of rocks on the thermal radiation parameters recorded in this way are currently superficial. Taking into account the water saturation degree of rocks is necessary when monitoring the mechanical condition of stone structures that are in direct contact with water. The main purpose of this work is to study the dependences of changes in the intensity of thermal radiation from the surface of limestone samples with different humidity under conditions of uniaxial compression. The obtained results showed the expected significant decrease in the mechanical properties (uniaxial compressive strength and elastic modulus) of water-saturated samples in comparison with dry ones. At the same time, a significant increase in the intensity of thermal radiation of limestone samples subjected to compression with an increase in their water saturation was recorded, which makes it necessary to take into account the revealed regularity when identifying changes in the stress state of stone structures established according to non-contact IR diagnostics in real conditions.

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Experimental Study of the Microstructural Characteristics of the Surfaces and Volumes of Granite Samples

Cited by 3 publications

References 2 publications

Experimental Study of Dynamic Fracture in Structurally Heterogeneous Materials on the Example of Rocks

Experimental Study of Dynamic Fracture in Structurally Heterogeneous Materials on the Example of Rocks

Experimental studies of the deformation characteristics of mudstones under high temperature exposure

Experimental study of thermomechanical effects in water-saturated limestones during their deformation

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