Ural Federal University named after the first President of Russia B.N. Yeltsin, Ekaterinburg, Russia:

A. G. Orlov, Postgraduate student, Dept. of Metal Forming, e-mail: alor110@mail.ru
Yu. N. Loginov, Dr. Eng., Professor, Dept. of Metal Forming
V. V. Kotov, Cand. Eng., Associate Professor, Technical Director of MECAS ESI Representation in Russia

The results of simulation of technological tests of pipes of 73×5.5 mm gauge made of steel 20 are considered. Two types of tests (for flattening and expansion) are performed using the ESI Virtual Performance Solution software and the Visual-Crash PAM 16.0 module. The possibilities of using this software package for solving tasks of plastic forming, as well as for predicting the technological properties of pipes of various assortments in order to save metal for samples and reduce the complexity of assessing the pipes quality, are demonstrated. The results of solving tasks in the form of the distribution of stress-strain state indicators over the volume of samples are presented, the critical degrees of deformation at the moment of failure are determined, and the obtained data are compared with known experimental ones. Formulas for calculating normalized quality indicators based on the results of technological tests of pipes for flattening and expansion are proposed, examples of calculations for pipes of the considered assortment are given.

1. Greve L., Vlachoutsis S. Multi-scale and multi-model methods for efficient crash simulation. International Journal of Crashworthiness. 2007. Vol. 12. No. 4. pp. 437–448.
2. Sasek J. et al. Effects of manufacturing process in crash simulations. Applied and Computational Mechanics. 2010. Vol. 4. pp. 113–120.
3. Guennec Y. Le, Bruneta J.-P., Daimb F. Z. A parametric and non-intrusive reduced order model of car crash simulation. Computer Methods in Applied Mechanics and Engineering. 2018. Vol. 338. pp. 186–207.
4. Azgaldov G. G., Raykhman E. P. About qualimetry. Moscow: Izdatelstvo standartov, 1973. 172 p.
5. Azgaldov G. G., Kostin A. V., Sadovov V. V. Qualimetry for everyone: textbook. Moscow: ID InformZnanie, 2012. 165 p.
6. Gun G. S. Quality control of high-precision profiles. Moscow: Metallurgiya, 1984. 152 p.
7. Rubin G. Sh., Chukin М. V., Gun G. S., Zakirov D. М., Gun I. G. Development of qualimetry theory for metalware products. Chernye Metally. 2012. No. 7. pp. 15–21.
8. Shubin I. G., Rumyantsev М. I., Toropitsina U. А., Demidova О. О. The selection of characteristics to represent the influence of the chemical composition of steel on the mechanical properties and microstructure of high-carbon wire rod. Vestnik Magnitogorskogo gosudarstvennogo tekhnicheskogo universiteta imeni G. I. Nosova. 2008. No. 3. pp. 34–38.
9. Naydenova А. V., Moller А. B. Increasing the efficiency of the methodology for calculation of a complex indicator of the reinforcing steel quality. Kalibrovochnoe byuro. 2014. No. 4. pp. 17–22.
10. Orlov G. A., Orlov A. G. Qualimetry rating of hot-rolled pipes. Solid State Phenomena. 2018. Vol. 284. pp. 1349–1354.
11. Orlov G. A., Gorbunova Yu. D. Development of a method for a comprehensive assessment of the quality of hot-forged elliptical bottoms. Chernaya metallurgiya. Byulleten nauchno-tekhnicheskoi i ekonomicheskoy informatsii. 2018. No. 12. pp. 97–102.
12. Steblov А. B. Comprehensive indicator of rolled metal quality and its application. Lityo i metallurgiya. 2017. No. 1 (86). pp. 97–102.
13. Zakirov D. М., Rubin G. Sh., Salnikov V. V. Apparatus of mathematical logic for a comprehensive assessment of the technological processes effectiveness. Proizvodstvo prokata. 2006. No. 12. pp. 35–58.
14. Orlov G. A., Kotov V. V., Orlov A. G. Simulation of the Behavior of Pipes with Variable Wall Thickness Under Internal Pressure. Metallurgist. 2017. Vol. 61, Iss. 1–2. pp. 106–110.
15. GOST 550–75. Seamless steel tubes for petroleum processing and petrochemical industry. Introduced: 01.01.1977.
16. GOST 8695–75. Tubing. Flattening testing method. Introduced: 01.07.1977.
17. Bogatov А. А., Mizhiritskiy О. I., Smirnov S. V. Plasticity resource of metals during metal forming. Moscow: Metallurgiya, 1984. 144 p.
18. GOST 8694–75. Tubing. Expansion testing method. Introduced: 01.01.1977.