Manifestations of Acoustic Emission in Frozen Soils with Simultaneous Influence of Variable Mechanical and Thermal Effects on Them

Новиков, Е. А.; Шкуратник, В. Л.; Zaitsev, M.G.

doi:10.31897/pmi.2019.4.383

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…Е. Л. Сосновской и А. Н. Авдеевым представлена методика анализа степени разрушенности керна исследовательских скважин с целью выявления потенциально удароопасных пород и оценки устойчивости горных выработок [27]. В работе [28] исследованы фундаментальные закономерности акустической эмиссии в мерзлых грунтах с целью количественной cenleu`mh)eqjne naeqoe)emhe p`gp`anŠjh leqŠnpnfdemhi ondgelm{l qonqnanl оценки напряженно-деформированного состояния и параметров устойчивости горного массива. В исследовании [29] приведена методика оценки естественного напряженного состояния горного массива на основе каротажа нефтяных скважин между глубинами 1600 и 2240 м на месторождении Курдистана (Ирак).…”

Section: Introductionunclassified

Data processing in full-scale in-situ stress testing by overcoring

Belyakov¹,

Морозов²,

Emel'Yanov³

2023

gzh

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Представлена методика обработки данных полевых испытаний по оценке естественного напряженного состояния горного массива методом кольцевой разгрузки, включающая в себя многовариантное численное моделирование и аналитический расчет. Основную задачу многовариантного численного моделирования -получение зависимостей смещений и деформаций стенок измерительной скважины -решают в пространственной постановке с использованием упругой модели поведения горного массива. Аналитический расчет проводят в рамках законов теории упругости.

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Section: Introductionunclassified

Data processing in full-scale in-situ stress testing by overcoring

Belyakov¹,

Морозов²,

Emel'Yanov³

2023

gzh

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“…One of the non-destructive methods of controlling of material properties is acoustic emission [1][2][3][4][5][6][7][8][9][10][11][12][13][14], which manifests itself during macro-, micro-and nanoscale rearrangement of the structure of elements. Nanomaterials are used to register acoustic emission -heterostructures with segmentelectric nanocrystals, nanostructured ceramics and composite materials piezo-and segmentonanoceramics.…”

Section: Introductionmentioning

confidence: 99%

Nanotechnologies of Strength Control of Materials

Nosov

Grigoriev

Peretyatko

et al. 2021

MSF

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The strength of materials is determined by their atomic molecular structure and the process of decay of atomic molecular bonds, which must be taken into account when optimizing materials strength control technologies. The fracture photomicrograph of metal microdamage of welded joint at various moments of time, a multilevel model of flow of acoustic emission signals of materials are presented. The physical meaning, the scale level of parameters included in the model are revealed. The structure of the mathematical model of the flow of AE signals with components of its informative elements of different scale level by strength characteristics of structural materials and resource of technical objects is shown. The multilevel model of the AE signal flow is hierarchically structured, obtained by generalizing deterministic-statistical variability. It describes the process of randomly recording deterministic accumulated damages in the material both before and after the formation of a crack at the stage of waiting for its next leap. It is shown that the proposed nanotechnology of strength control of materials is reduced to non-destructive determination of parameters of prognostic homogeneous destruction, identification of which is based on multilevel modeling of time dependence of micro-crack formation, formulation of criterion of strength homogeneity, registration of AE parameters related to the model of a specific product, which can be automated processing of registration results and determination of universal strength nanoconstants from already published reference data of fatigue tests of standard material samples.

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Geotechnical monitoring of frozen soils: problems and possible solutions

Потапов

Shikhov

Dunaeva

2021

IOP Conf. Ser.: Mater. Sci. Eng.

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A great part of the territory of the Russian Federation is located in the zone of permafrost soils. Safe operation management of buildings and structures, in permafrost conditions, requires geotechnical monitoring of subgrade soils. The increase in air temperature recorded during numerous monitoring leads to the degradation of permafrost soils. Therefore, the problem of conducting geotechnical monitoring becomes more urgent than ever. This paper analyzes the existing methods and systems for geotechnical monitoring of permafrost soils. The authors reveal the drawbacks of the applied methods and the reasons that do not allow assessing the state of frozen soils with sufficient accuracy. In order to solve these problems, it is proposed to use an active acoustic method of non-destructive testing and create a system that combines an engineering-geological method determining the deformation properties of frozen soils and active acoustic method.

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Manifestations of Acoustic Emission in Frozen Soils with Simultaneous Influence of Variable Mechanical and Thermal Effects on Them

Cited by 4 publications

References 4 publications

Data processing in full-scale in-situ stress testing by overcoring

Data processing in full-scale in-situ stress testing by overcoring

Nanotechnologies of Strength Control of Materials

Geotechnical monitoring of frozen soils: problems and possible solutions

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