RUDN Journal of Engineering ResearchRUDN Journal of Engineering Research2312-81432312-8151Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)2267110.22363/2312-8143-2019-20-2-134-139Research ArticleDevelopment of methodology for calculation of discontinuous circular welds in torsionBelousovYury V.<p>Associate Professor of Department of Basis of Machine Construction of Bauman MSTU, Associate Professor of Department of Construction of the Academy of Engineering of RUDN University, PhD (Technical Sciences)</p>belou.80@mail.ruKleymukIvan A.<p>student of the Mechanical-Technological Department of Bauman MSTU.</p>belou.80@mail.ruStrashnovStanislav V.<p>senior lecturer of Department of Construction of the Academy of Engineering of RUDN University, PhD (Technical Sciences).</p>belou.80@mail.ruBauman Moscow State Technical University (National Research University of Technology)Peoples, Friendship University of Russia (RUDN University)1512201920213413915012020Copyright © 2019, Belousov Y.V., Kleymuk I.A., Strashnov S.V.2019<p>The main criterion for the performance of welds is the strength. The least durable are the corner joints used to perform various types of welded joints. In the literature, the methods of calculating the strength of welded joints with solid seams are considered in sufficient detail. Methods of calculation of connection interrupted sutures absent. In this case, the greatest difficulty is the calculation of connections using circular intermittent seams, which are often performed in welded drums and pulleys. They work on torsion. Therefore, the development of methods for calculating circular intermittent seams for torsion is quite important. Shear stresses in welds from torque are determined depending on the value of the polar moment of resistance of its dangerous section. When determining the polar moment of resistance of the dangerous section of a circular discontinuous seam, it was represented by a set of sections in the form of a sector of a circular ring. The method of calculation of the polar moment of resistance of the rotated dangerous section of a circular discontinuous weld, which takes into account the relative length of the weld areas and their number, is proposed, as well as the method of accurate and approximate calculation of shear stresses in the weld.</p>weldsthe highest shear stressespolar moment of resistanceturned a dangerous cross-sectionсварные швынаибольшие касательные напряженияполярный момент сопротивленияповернутое опасное сечение[Herrera HH, Eras JJC, Morejion MB, Espinosa RG. Stress in butt welded joints of open profiles under torsion. Ingeniare. 2015;23(4): 638–646. Available from: doi:10.4067/ S0718-33052015000400014][Belousov YV, Rekach FV, Shambina SL. Modelling of the Tools’ Power Interaction during Mechanical Machining by Cutting. International Journal of Recent Technology and Engineering. 2018;7: 132–134.][Vogwell J, Mingues JM. Predicting Failure in noncontinuous welds stamps when used in joints under torsion loading. Engineering Failure Analysis. 1997;4(4): 227–236.][Andrienko LA, Baykov BA, Zakharov MN, et al. Detali mashin: uchebnik dlya vuzov [Parts of machines: textbook for universities]. Moscow: MGTU imeni N.Uh. Bauman Publ.; 2014. (In Russ.)][Ivanov MN, Finogenov VA. Detali mashin: uchebnik dlya mashinostroitel'nyh spec. vuzov. 11-e izd. [Parts of machines: textbook for machine-building special machine parts. 11th ed.]. Moscow: Vysshaya shkola Publ; 2007. (In Russ.)][Belousov YuV. Analiz napryazhennogo sostoyaniya krugovogo preryvistogo svarnogo shva tavrovyh soedinenij [Analysis of the tension state of the circumferential intermittent weld of the t-joining]. Structural Mechanics of Engineering Construction and Buildings. 2015;(3): 54–57. (In Russ.)][Birger IA, Shorr BF, Iosilevich GB. Raschet na prochnost' detalej mashin: spravochnik. 4-e izd. [Strength calculation of machine parts: handbook. 4th ed.]. Moscow: Mashinostroenie Publ; 1993. (In Russ.)][Zumarev YA. Tekhniko-ekonomicheskaya effektivnost' primeneniya preryvistyh svarnyh shvov [Technical and economic effectiveness of intermittent welds]. Welding production. 2013;(2): 58–60. (In Russ.)][Belousov VV. Raschet pogreshnosti zakrepleniya pri ustanovke zagotovok na opory prisposobleniya [Calculation of clamping error when mounting a workpiece on fixture supports]. RUDN Journal of Engineering Researches. 2018;19(1): 38–45. (In Russ.)][Shambina SL, Rekach FV, Belousov YV. On new modification of some strength criteria for anisotropic materials. Key Engineering Materials. 2016;724: 53–57.]