Generation of the response electromagnetic signal in the process of destruction of shell structures

Кузеев, И.Р.; Naumkin, E.A.; Tepsaev, A.N.; Samigullin, A.V.; Gafarova, V.A.

doi:10.5510/ogp20150400264

Cited by 9 publications

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“…The study [20] has shown that in the zone of destruction of flat samples, the relative average stress of the amplitude of the electrical signal response decreases during deformation and has an extreme value when the limit state is reached. In the study [17] it was found that in the zone of destruction of flat samples areas with extreme values of the electrical signal response parameters are formed from the very beginning of loading, which indicates potentially dangerous zones in the early stages of loading. Studies [17,20] show that the parameters of the response of an electrical signal are sensitive to changes in the structure and sources of defect.…”

Section: Introductionmentioning

confidence: 96%

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Regularities of Changes in the Mechanical Characteristics and Electrical Properties of the Reaction Furnaces Coils Material during Operation

Naumkin

Shermatov

2020

MSF

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The main causes of early failure of reaction furnaces coils are diffusion processes in the material as a result of which structural changes occur, new phases are formed and void structure is formed in the surface layers of the metal, which has a negative effect on the mechanical characteristics. In this regard as a structurally sensitive method, which allows evaluating the changes occurring in the metal, the response parameters of the electrical signal are used which are sensitive to pore formation and allow predicting the zone of formation of the breaking crack. Fragments of the coils of the reaction furnaces from the radiant section, which were in operation for 750, 1300, 8000, and 10000 hours and the pipe element in the delivery condition were chosen as the objects of the study. As a result of the research a correlation between the amplitude of the first harmonic of the electrical signal output voltage with the results of static tests for tensile and impact bending was established. This happens due to the fact that during operation there is an increase in the relative impact viscosity and relative tensile strength, and the relative magnitude of the voltage amplitude of the first harmonic of the output electrical signal also increases. These results can be used as a method of mechanical properties assessment by non-destructive testing, and also they can be used to develop a criterion for the rejection of reaction furnace coils.

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Section: Introductionmentioning

confidence: 96%

“…The authors [17] found out that in structural materials the centers of destruction are formed at the nano-and microlevels. At the same time, any gradient channels formed in the structure contribute to the movement and accumulation of the energy of external influence in the areas of possible destruction.…”

Section: Introductionmentioning

confidence: 99%

Regularities of Changes in the Mechanical Characteristics and Electrical Properties of the Reaction Furnaces Coils Material during Operation

Naumkin

Shermatov

2020

MSF

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“…В этом случае возможно применение магнитных методов контроля, которые успешно применяются для определения работоспособности, ресурса и предельного состояния металла [3][4][5][6] Наиболее приемлемым методом для решения указанных выше проблем, на наш взгляд, является контроль равномерности затяжки методом остаточной намагниченности [1] с использованием индикатора механического напряжения металла ИН-01м сканирующего типа, поскольку он обладает рядом преимуществ перед другими: -прибор имеет небольшие размеры, что позволяет применять его как в цеховых, так и в полевых условиях; -обладает высокой локальностью и производительностью магнитного контроля НДС металла; -возможен контроль усилия затяжки болтов или шпилек, как при монтаже (сборки), так и во время эксплуатации оборудования при существенной ограниченности рабочего пространства; -имеет небольшую погрешность измерения; -прибор имеет широкую область применения и большие функциональные возможности (автоматическая регистрация результатов магнитного контроля и запись в электронную память, передача результатов измерений на персональный компьютер с программным обеспечением для анализа, интерпретация и оформления результатов контроляформирование таблиц, графиков и контурных диаграмм.…”

Section: Introductionunclassified

Magnetic Inspection for Assessing the Uniformity of Flange Joints Bolt Tightening

2018

RIJIE

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“…In this case, it is possible to use the magnetic inspection that is successfully used for performance, resource and metal limit state measurements [1,[13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Inspection for Assessing the Uniformity of Flange Joints Bolt Tightening

Tukaeva

Prokhorov

Miniakhmetov

2018

Proceedings of the 4th International Conference on Industrial Engineering

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Flange joints refer to the most widespread detachable joints used in various industries. Such joints should be strong, durable, and leak proof. Compliance with these requirements depends largely on the uniformity of bolt tightening. In flange joints, it is necessary to provide that all bolts (pins) are tightened with equal force. Nonuniformity of bolt tightening could lead to different negative consequences, for example, to the lack of parts alignment, irregular gasket compression and as a result leaking of the product, misalignment of connected details, the origination of fastening details plastic deformations, and even breakage of bolts or pins. That is why controlling steel pins and bolts tightening force is very important for the provision of joint reliability and not only during assembly and installation of units and details of any other equipment but also during its operation. The present article is devoted to studying and testing of one of the modern and universal methods of bolt (pin) tightening force control-magnetic inspection based on structure-sensitive magnetic parameter control-remaining magnetic induction of the metal. The aim of present studies is to test the metal mechanical stress indicator IH-01m of a scanning type used at real facilities for measuring pin tightening force during operation.

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Generation of the response electromagnetic signal in the process of destruction of shell structures

Cited by 9 publications

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Regularities of Changes in the Mechanical Characteristics and Electrical Properties of the Reaction Furnaces Coils Material during Operation

Regularities of Changes in the Mechanical Characteristics and Electrical Properties of the Reaction Furnaces Coils Material during Operation

Magnetic Inspection for Assessing the Uniformity of Flange Joints Bolt Tightening

Magnetic Inspection for Assessing the Uniformity of Flange Joints Bolt Tightening

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