List of publications in 2021, in which our clients describe examples of the use of our company's products:
Y. G. Matvienko, I. E. Vasil'ev, D. V. Chernov (Mechanical Engineering Research Institute of the Russian Academy of Sciences). Damage and failure of unidirectional laminate by acoustic emission combined with video recording. Acta Mechanica. 2021. DOI: 10.1007/s00707-020-02866-6. eLibrary ID: 45014944
Abstract
Research results of damage and failure of unidirectional laminate packages under tension are presented. A study of the kinetics of damage and failure of the laminate structure is carried out by means of acoustic emission (AE) and synchronous video recording. The conformity between failure proceses occurring on the microscopic, mesoscopic and macroscopic scale levels and the recorded AE events including their energy parameters, shape and spectrum is established. The structural–phenomenological approach implemented by dividing the AE data array into energy clusters allows analyzing the degree of damage and failure of the material employing new criteria parameters, namely the registration activity and the weight content of the location AE events in the clusters of the lower, middle and upper energy levels
R. Oshkin (National University of Science and Technology MISIS, Mining Institute, Moscow). Method of thermally stimulated acoustic emission to assess changes in the deformed state of rocks under quasi-static loading. E3S Web of Conferences 266, 03009 (2021). DOI: 10.1051/e3sconf/202126603009. https://www.e3s-conferences.org/articles/e3sconf/pdf/2021/42/e3sconf_ti2021_03009.pdf (full text). eLibrary ID: 46824262
Abstract
This paper presents the results of an experimental study of the acoustic-emission response of limestone samples exposed to incrementally increasing quasi-static mechanical loads and a series of thermal shocks. The subject of the study also included the design and composition (confi-guration) of the laboratory facility for the research, as indicated above. The patterns of change in thermally stimulated acoustic emission (TAE) as a function of the deformed state of limestone under development are theoret-ically substantiated. An acoustic-emission criterion enabling a qualitative assessment of the residual strength of rocks was proposed and substan-tiated. The methodological approaches to the processing with the presenta-tion of the author’s interpretation of the physical meaning of the experi-mentally obtained initial measurement data are defined. Finally, the fundamental possibility of using the obtained results in the field conditions for monitoring the evolution of the deformed state of rocks is shown.
Builo, S.I., Builo, B.I. Chebakov, M.I. (Institute of Mathematics, Mechanics and Computer Science named after I.I. Vorovich, Southern Federal University, Rostov-on-Don, Russia; Russian University of Transport (MIIT), Moscow, Russia). Probalistic-Information Approach to Assessing the Reliability of the Results of the Acoustic-Emission Method of Testing and Diagnostics. Russ J Nondestruct Test 57, 375–382 (2021). DOI: 10.1134/S1061830921050077. eLibrary ID: 47038021
Abstract
The features of the quantitative determination of the reliability of the results of the acoustic- emission (AE) method of monitoring and diagnostics are considered. It has been established that the traditional way of defining reliability via the probability of a controlled parameter falling into a certain interval sometimes suffers from informational underdetermination. It is shown that taking into account the probabilistic and information aspects of the assessment of reliability makes it possible to unambiguously link the concept of reliability of the results of testing and diagnostics with the amount of information obtained in the course of the inspection or diagnostics operation itself. Examples of practical determination of information reliability of the results of AE method are given.
Makhutov N.A., Vasiliev I.E., Chernov D.V., Ivanov V.I., Terent’ev E.V. (Mechanical Engineering Research Institute, Russian Academy of Sciences, Moscow; ZAO RII MSIA “Spectrum”, Moscow; Moscow Power Engineering Institute, Moscow). Kinetics of damage accumulation and failure in the zones of stress raisers in sample rupture tests. Russian Journal of Nondestructive Testing. 2021. Т. 57. № 1. С. 31-42. DOI: 10.1134/S1061830921010095. eLibrary ID: 46023085
Abstract
The influence of various kinds of stress raisers on the processes of damage accumulation, initiation, and propagation of cracks in specimens of steel St3 under uniaxial tension has been considered. The investigated samples had a central aperture with diameter of ∅ = 5 mm or a transverse weld. The results of acoustic emission diagnostics showed that, despite the different nature of the stress raisers, the loading diagrams, the nature of damage accumulation and development of main cracks, the number of recorded acoustic emission (AE) events, and the activity of their recording, as well the dynamics of changes in the weight content of location pulses (Wi) in the energy clusters of the low, medium, and high levels were quite similar, along with the values of these parameters during sample failure.
Makhutov N.A., Vasil'ev I.E., Chernov D.V., Mishchenko I.V., Moskovskaia D.S. (Mechanical Engineering Research Institute of the Russian Academy of Sciences; Moscow Power Engineering Institute (MPEI)). Estimation of the additive and multiplicative error of the standard algorithm of acoustic emission sources linear location. IOP Conference Series: Materials Science and Engineering : 32th International Conference of Young Scientists and Students Topical Problems of Mechanical Engineering 2020 (TopME 2020), Moscow, 02–04 December 2020. Blagonravov Mechanical Engineering Research Institute of the Russian Academy of Sciences (IMASH RAN). Moscow. IOP Publishing Ltd, 2021. P. 012018. DOI 10.1088/1757-899X/1129/1/012018. https://iopscience.iop.org/article/10.1088/1757-899X/1129/1/012018 (full text). eLibrary ID: 48134340
Abstract
The paper deals with the results of the standard acoustic emission (AE) source linear location algorithm, which evaluates the location of developing damage in a steel sample under static load test to destruction. The linear location algorithm error is due to many factors: acquisition threshold of the AE signals and the dispersion properties of recorded signals, in particular, the dependence of the AE signal propagation velocity on its amplitude. According to the test results, the additive error in determining the time difference of arrival (TDA) of the AE signals to the transducers array is 52.8 μs and the average multiplicative error level is 0.67