In-Production Nondestructive Testing of Internal Stresses in Rails Using Acoustoelasticity Method

Муравьев, В. В.; Tapkov, K. A.; Len’kov, S. V.

doi:10.1134/s1061830919010078

Cited by 18 publications

(5 citation statements)

References 8 publications

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“…Considering the rather short loading time interval of up to 10 seconds, no measures were taken to compensate for temperature changes and temperature compensation sensors were not used. Signals from single strain gauges were digitized with a sampling frequency of 8 kHz and a cost of the smallest digit of an analog-to-digital converter of 7.4ꞏ10-7 relative strain units [8,9,10].…”

Section: Resultsmentioning

confidence: 99%

Study of press joints using strain gauges at low loads

Popkov,

Shlyakhtenkov,

Vyplaven

2024

E3S Web Conf.

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The destruction of the bearing ring of the axle box unit inevitably leads to the uncoupling of the car, which causes temporary and material losses. The problem of determining the bearing ring tension without removal is relevant; its solution will improve efficiency and reduce the inspection time. Experimental studies were carried out to determine the forces inside the contact pair, as well as their relationship with the amount of interference. It has been established that with small impacts on the ring, surface deformations in the area of impact are uneven and form a gradient in which large deformations are observed at the edge of the ring, smaller ones in the middle. It has been proven that the transition boundary of the magnitude of deformations depends on the magnitude of the interference in the contact pair. A method for determining the tension by strain gauging is proposed.

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Section: Resultsmentioning

confidence: 99%

Study of press joints using strain gauges at low loads

Popkov,

Shlyakhtenkov,

Vyplaven

2024

E3S Web Conf.

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“…it is necessary to control changes in the properties of the metal at the level of its structure. The results of numerous studies indicate that defects in the metal structure originate and develop in zones of concentration of mechanical stresses [4,6,9,13,18,23]. Therefore, to prevent the destruction of equipment at hazardous production facilities, it is necessary to identify zones of increased concentration of mechanical stress and monitor the state of the metal structure in these zones.…”

Section: Introductionmentioning

confidence: 99%

“…[10], [11], Muravyova V.V. [13], [14] and their colleagues made it possible to create electromagnetic-acoustic devices -structuroscopes, mechanical stress meters, flaw detectors, thickness gauges, which are used to solve specific problems in real production conditions. But, despite the results achieved in the field of creating electromagnetic-acoustic means of non-destructive testing and diagnostics, we have to admit that in terms of their main technical and metrological characteristics they are inferior to similar indicators of traditional ultrasonic testing means with contact piezoelectric transducers.…”

Section: Introductionmentioning

confidence: 99%

Information and measuring complex for studying the influence of mechanical stresses in metal on the parameters of electromagnetic-acoustic transformation

Bashirov,

Bashirova,

Yusupova

et al. 2024

Third International Conference on Optics, Computer Applications, and Materials Science (CMSD-III 2023)

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The purpose of this article is to develop an information-measuring complex for studying the influence of mechanical stresses in metal on the parameters of electromagnetic-acoustic conversion. Based on a comparative analysis of existing installations for studying the acoustic and electrophysical properties of metals, the structure and composition of the information-measuring complex have been developed. When developing the complex and planning research, the requirements of current regulatory and technical documents were taken into account. The research results are aimed at improving methods for isolating and processing information contained in the signal of an electromagnetic-acoustic transducer to increase the sensitivity and information content of non-destructive testing and diagnostics of metal structures.

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“…В основе методов лежит использование физических полей различной природы -электромагнитных, упругих и др. [4][5][6][7][8]. Методы неразрушающего контроля позволяют получить информацию о состоянии контролируемой конструкции без разрушения и нарушения ее работоспособности.…”

Section: Introductionunclassified

Evaluation of Structural Metal Materials Damage by Acoustic Methods

Khlybov¹,

Uglov²,

Ryabov³

et al. 2022

Vestnik IzhGTU imeni M.T. Kalashnikova

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The purpose of this research is to study the damage of structural metal materials by acoustic method under various external fatigue and thermal influences. A structural model describing the process of accumulation of scattered micro-damages in the material is proposed, the parameters of which can be measured by acoustic method. It is shown that irreversible processes occur in the structure of structural metal materials during cyclic loading, leading to changes in physical and mechanical characteristics. The assessment of changes in a large number of informative parameters of acoustic control in the process of damage accumulation was carried out. It is established that the parameters of elastic waves depend on the characteristics of the medium under study. It is shown that the state of the surface layer can be used in the tasks of earlier assessment of the developed resource of the structural material. A model that takes into account the influence of degradation processes of the surface layer on the parameters of surface waves is proposed. The results of experimental studies confirming the proposed model are presented. Methods for determining material mechanical characteristics are proposed: elastic modulus, yield strength, fracture toughness, internal stresses, grain size, etc. on structural elements, without violating their strength characteristics. The results of studies of medium influence on parameters of elastic waves serve as the basis for constructing a complex acoustic method for determining physical and mechanical characteristics of structural materials. Examples of practical use of the obtained results in the tasks of ensuring the safe operation of critical structural elements are considered. The data obtained during the study make it possible to assess the damaged state and properties of metal materials under cyclic loading quickly using the parameters of acoustic waves.

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In-Production Nondestructive Testing of Internal Stresses in Rails Using Acoustoelasticity Method

Cited by 18 publications

References 8 publications

Study of press joints using strain gauges at low loads

Study of press joints using strain gauges at low loads

Information and measuring complex for studying the influence of mechanical stresses in metal on the parameters of electromagnetic-acoustic transformation

Evaluation of Structural Metal Materials Damage by Acoustic Methods

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