10.14489/td.2018.08.pp.034-039

2018, 08 August

DOI: 10.14489/td.2018.08.pp.034-039

Popov A. V., Teslya D. N., Komlev A. B.
THE SYSTEM OF EVALUATION OF STRENGTH OF STRUCTURES AVIATION AND ROCKET-SPACE TECHNOLOGY BASED ON THE METHOD OF ACOUSTIC EMISSION
(pp. 34-39)

Abstract. To make acoustic emission monitoring more effective a probabilistic approach has been developed toevaluating the informative emission parameters. A method has been devised for assessing the extent and risk of the damage to load-bearing elements which is based on evaluating changes in distributions of the informative parameters of acoustic emission processes during structural deformation with the use of invariants. The values of the proposed invariants are not dependent on the amplitude and intensity of acoustic emission signals and hence on the structure’s form, dimensions and performance history. This is due to the fact that the shape of statistical distributions of the informative emission parameters is defined solely by physics of processes occurred in a structure being deformed. Multichannel acoustic emission hardware and software complexes have been developed on the basis of invariants of acoustic emission processes, the experimental technique, and the stress-strain state modeling procedure. The relationship between the acoustic emission processes’ statistical regularities and destruction processes has been studied experimentally. The suggested system for serviceability evaluation of structures implemented in acoustic emission hardware and software complexes makes it possible to quickly and efficiently process the multichannel and multiparameter information about changes of the informative parameters of acoustic emission and positions of defects as well as to assess how critical the defects are and whether the structure can be used in prospect or not.An example has been given of how the results obtained can be used in assessing the strength of liquid rocket engine exits.

Keywords: strength of structures, aircraft equipment, rocket and space technology, acoustic emission, invariants.

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A. V. Popov, D. N. Teslya, A. B. Komlev (Military Training and Scientific Center of the Air Force “Air force Academy named after Professor N. E. Zhukovsky and Y. A. Gagarin, Voronezh, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. Rules for the organization and conduct of acoustic emission control of vessels, apparatuses, boilers and process pipelines. (2013). Safety Rules No. 03-593–03. Moscow: Gostekhnadzor Rossii. [in Russian language]
2. Klyuev V. V. (Ed.), Ivanov V. I., Vlasov I. E., Balitskiy F. Ya., Barkov A. V., Barkova N. A. et al. (2005). Non-destructive testing. Handbook. In 8 volumes. Vol. 7. Book 1. Acoustic emission method. Book 2. Vibrodiagnostics. Moscow: Mashinostroenie. [in Russian language]
3. Rasscheplyaev Yu. S., Popov A. V. (2000). Method of invariants in the problem of investigation of acoustic emission fluxes. Defektoskopiia, (10), pp. 79-82. [in Russian language]
4. Popov A. V. (2004). A method for evaluating the processes of structural failure during acoustic emission testing. Ru Patent No. 2233444. Russian Federation. [in Russian language]
5. Rasscheplyaev Yu. S., Popov A. V. (2006). A generalization of the invariant method for estimating the change in the characteristics of acoustic emission when controlling the strength of structures. Kontrol'. Diagnostika, (5). [in Russian language]
6. Popov A. V., Kondranin E. A. (2008). The method of controlling the strength of structural elements of structures on the basis of the estimation of the numerical-time characteristics of AE-processes. Kontrol'. Diagnostika, (7), pp. 45- 47. [in Russian language]
7. Popov A. V., Zhumay V. E. (2008). Determination of strength characteristics of structures on the basis of amplitude-like invariants of acoustic-emission processes. Kontrol'. Diagnostika, (10), pp. 29-32. [in Russian language]

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