10.14489/td.2016.05.pp.055-060

2016, 05 May

DOI: 10.14489/td.2016.05.pp.055-060

Kulak S.M., Novikov V.F.
THE ASSESSMENT OF MECHANICAL STRESSES IN THE STEEL STRUCTURES AND CONSTRUCTIONS UNDERGOING MULTI-AXIAL DEFORMATION
(pp. 55-60)

Abstract. Еру Complicated stress state of steel structures and constructions is determined by the combined influence on them of the loads and impacts expressed by the value ofequivalent stress. In the steel pipelines or other filled vessels, this state depends on the action of the orthogonal circular and longitudinal axial stresses caused by the internal pressure, its own weight, the temperature changes, the subsidence and frost heave ground, the prestressing. This article is devoted to investigation of the magnetoelastic demagnetization in the steel cylinders experiencing the orthogonal deformations from the internal pressure and the external longitudinal stretching. It is shown that a variation of the lateral deformation of steel allows to measure the value of its longitudinal stresses using magnetoalastic memory. It is offered the way of control of the longitudinal axial mechanical stresses of the steel pipes on the magnitude of the magnetoelastic demagnetization caused by the variation of internal pressure. The proposed method does not require measurements of the initial value of the stray magnetic field strength of the local magnetization of steel in its unloaded state.

Keywords: steel construction, demagnetization, local magnetization, mechanical stresses, the metered unloading.

+ - About the Authors Click to collapse

S. M. Kulak, V. F. Novikov (Federal State Budget Educational of Higher Education «Industrial University of Tyumen», Tyumen, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. Steel constructions. (2013). Ru Standard No. GOST 23118–2012. Moscow: Standartinform.
2. Loads and effects. (2011). Construction norms and rules No. SP 20.13330.2011. Moscow.
3. Kurochkin V. V., Maliushin N. A., Stepanov O. A., Moroz A. A. (2001). Operational durability of the pipelines. Moscow: Nedra.
4. Maliarenko A. A., Semenov A. A. (2013). Analysis of stress-strain state of the nodes models of metal constructions in the SCAD environment. Stroitel'naia mekhanika i raschet sooruzhenii, (3), pp. 47-56.
5. Blokhina N. S., Galkin A. G., Shcherbina S. V. Analysis of stress-strain state of the flat structural elements of the orthotropic nonlinear elastic material using computer system ANSYS. Stroitel'naia mekhanika i raschet sooruzhenii, (2), pp. 48-51.
6. Rudachenko A. V., Saruev A. L. (2011). Study of stress-strain state of pipelines. Tomsk: Izdatel'stvo TPU.
7. Muzhitskii V. F., Popov B. E., Bezliud'ko G. Ia. (2001). Magnetic testing of the stress-strain state and remaining resource of hoisting steel metal structures and vessels, working under pressure. Defektoskopiia, (1), pp. 38-46.
8. Zakharov V. A., Ul'ianov A. I., Gorkunov E. S. (2010). Laws of change of the coercive force of the biaxial asymmetric deformation of steel St 3. Defektoskopiia, (3), pp. 21-28.
9. Lomaev G. V., Merzliakov Iu. M. (2004). Barkhausen effect. Izhevsk: IzhGTU.
10. Dubov A. A., Demin E. A., Miliaev A. I., Steklov O. A. (2002). Experience of monitoring the stress-strain state of the pipelines using the metal magnetic memory method in comparison with traditional methods and means of strain testing. Kontrol'. Diagnostika, (4), pp. 53-56.
11. Gorkunov E. S. (2014). Different state of residual magnetization and resistance to external influences. On the question of «magnetic memory method». Defektoskopiia, (11), pp. 3-21.
12. Novikov V. F., Vazhenin Iu. I., Bakharev M. S. et al. (2009). Diagnostics of the points of increased degradability of the pipeline. 2nd Ed. (reprint). Moscow: «Nedra-Biznestsentr» LLC.
13. Kostin V. N., Tsar'kova T. P., Nichipuruk A. P. et al. (2009). Irreversible change in magnetization as indicators of stress-strain state of ferromagnetic objects. Defektoskopiia, (11), p. 5.
14. Kulak S. M., Novikov V. F. (2015). Determination of mechanical stresses in steel by magnetoelastic demagnetization. Zavodskaia laboratoriia, 81(7), pp. 56-59.
15. Novikov V. F., Ershov S. A., Bakharev M. S., Zavodovskii A. G., Fedorov B. V. (2000). The method for determining the stress fields in the details of ferromagnetic materials. Ru Patent No. 2154262. Russian Federation.

+ - Purchase digital version of a single article Click to collapse

This article is available in electronic format (PDF).

DOI: 10.14489/td.2016.05.pp.055-060

Copy the article DOI and follow the link https://id-spektr.ru/product/pokupka-elektronnoy-stati-iz-zhurnala-kontrol-diagnostika

Please specify the article DOI in the order comments.