Interconnection of structural features and physico-mechanical properties of rocks

Вайсберг, Л. А.; Каменева, Е. Е.

doi:10.17580/gzh.2017.09.10

Cited by 7 publications

(6 citation statements)

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“…This method involves scanning the sample over the entire volume in different directions with a step of ~ 1 microns, which allows you to visualize the internal three-dimensional structure of the samples. The method is now widely used to study the structural elements of various materials, including rocks [11].…”

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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“…В качестве иллюстрации возможностей данного метода приведены микротомографии образца гнейсо-гранита до и после механического воздействия (рис. 1) [18]. На них четко видно, что в результате механического воздействия происходит трансформация структуры порового пространства: первичные поры частично смыкаются и появляются новые поры и микротрещины, размеры, количество и форма которых зависят от свойств минеральной фазы.…”

Section: рентгеновская томографияunclassified

“…1. Строение порового пространства образца гнейсо-гранита: pgu_01 -исходный образец; pgu_02 -образец после воздействия сжимающей нагрузки [18] Томографическое изучение продуктов разрушения позволило сделать вывод, что вторичная (приобретенная в результате дезинтеграции) пористость горных пород зависит от применяемого способа дробления и типа дробильного оборудования. Полученные результаты послужили основой для разработки энергосберегающих технологий дезинтеграции горных пород применительно к их текстурно-структурным типам.…”

Section: рентгеновская томографияunclassified

Methods of Studying the Structure and Properties of Mountain Breeds on Samples (Quick Review)

Karabutov

Cherepetskaya

Kravcov³

et al. 2018

Gorn. nauki tehnol.

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Some non-destructive methods for controlling the internal structure of rocks are described and examples of their use are given. Examples of the use of X-ray and neural tomography, scanning electron and acoustic microscopy are also given. It is shown that the method of laser-ultrasound struktroskopii is promising. Two examples of the use of the latter are given: measuring the local porosity of samples of geomaterials and monitoring changes in the internal structure as a result of electromagnetic exposure.

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“…Одной из актуальных задач микромеханики материалов является определение связи эффективных упругих и прочностных свойств материалов с их внутренней структурой [1]. В частности, большой практический интерес представляет исследование влияния трещин и других неоднородностей на свойства горных пород [1][2][3]. Данные о количестве, форме и размерах неоднородностей могут быть получены, например, с использованием микротомографии [2,3].…”

Section: Introductionunclassified

“…В частности, большой практический интерес представляет исследование влияния трещин и других неоднородностей на свойства горных пород [1][2][3]. Данные о количестве, форме и размерах неоднородностей могут быть получены, например, с использованием микротомографии [2,3]. Для оценки влияния трещин на свойства материала может использоваться приближение невзаимодействия [1, 4 -6].…”

Section: Introductionunclassified

Calculation of the normal and shear compliances of a three-dimensional crack taking into account the contact between the crack surfaces

Lapin

Kuzkin

2019

Lett. Mater.

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The calculation of the effective mechanical properties of materials with cracks is a long-standing problem in micromechanics. Usually each crack is modeled by a mathematical cut with traction free surfaces. In this case, the normal and shear compliances of the crack are approximately equal. Then the effective elastic properties of the material with randomly located and arbitrary oriented cracks are orthotropic. If the partial contact between the crack surfaces is taken into account, then the normal and shear compliances are generally different, and the effective properties are no longer orthotropic. This paper proposes a three-dimensional model for estimation of the effect of contacts on the normal and shear compliances of the crack. An infinite flat crack is considered. The surfaces of the crack are connected by a doubly periodic system of identical contacts. Each contact has the shape of a rectangular parallelepiped. The centers of the contacts form a square lattice. The influence of contact sizes and distance between contacts on the ratio of the normal and shear compliances of the crack is investigated. The compliances are calculated numerically using the finite element method. Calculations are carried out for a periodic cell containing a single contact. It is shown that in all considered cases, the normal compliance of the crack is less than shear compliance. The difference between the compliances increases with increasing contact height. A comparison with similar results obtained in a two-dimensional formulation is carried out. It is shown that in the twodimensional case the ratio of compliances is larger than in the three-dimensional case.

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Interconnection of structural features and physico-mechanical properties of rocks

Cited by 7 publications

References 0 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

Methods of Studying the Structure and Properties of Mountain Breeds on Samples (Quick Review)

Calculation of the normal and shear compliances of a three-dimensional crack taking into account the contact between the crack surfaces

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