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2018 №08 (01) DOI of Article
10.15407/as2018.08.02 		2018 №08 (03)

Automatic Welding 2018 №08


Avtomaticheskaya Svarka (Automatic Welding), #8, 2018, pp. 8-14
 

Fatigue resistance of welded elements of freight cars of a new design made from steels of S345 and S390 grade

A.G. Reidemeister1, V.A. Kalashnik1, V.V. Knysh2, S.A. Solovej2


1Acad. V. Lazaryan Dnipropetrovsk National University of Railway Transport.  2 Lazaryan Str., 49010, Dnipro. E-mail: dnuzt@diit.edu.ua
2E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
 
Abstract
The paper presents the results of experimental and computational studies of fatigue resistance of full-scale samples of the pivot assembly and side wall rack sealing assembly of a gondola car of 12-4106-01 model. It is found that their operating life is determined by fatigue resistance of welded joints of structural elements of the assembly. Their fatigue strength is equal from 12.1 MPa (side wall rack sealing assembly) up to 33.6 MPa (pivot assembly). Sections of fatigue cracks initiation, regularities of their propagation and fatigue strength of structures were established. As shown by calculation of the car body stressed state, the fatigue strength values ensure operation for 34.1 and 57.0 years, for the pivot assembly and side wall rack sealing assembly, respectively, before appearance of the fatigue crack. 9 Ref., 2 Tabl., 8 Fig.
Keywords: welded elements of fright cars, pivot assembly, side wall rack sealing assembly, fatigue resistance, stressed state
 
References
  1. Bityutsky, A.A. (2009) Analysis of development of methods for evaluation of fatigue strength of load-carrying structures of freight car bodies. In: Study of fatigue strength of assemblies and selection of parameters of new freight cars: Transact. Ed. by A.A. Bityutsky. St.-Petersburg, Inzhenerny Tsentr Vagonostroeniya, 7 , 6-13 [in Russian].
  2. Khilov, I.A., Afanasiev, A.E. (2009) Selection of parameters of side wall rack sealing assembly of a gondola car. In: Study of fatigue strength of assemblies and selection of parameters of new freight cars: Transact. Ed. by A.A. Bityutsky. Ibid., 7 , 34-43 [in Russian].
  3. Bityutsky, A.A., Afanasiev, A.E. (2009) Study of fatigue strength of side wall rack sealing assemblies of new design of a gondola car body. Ibid.,7 , 54-61 [in Russian].
  4. Plotkin, V.S., Druzhinin, S.S., Chentsov, E.I. (1978) Study of fatigue strength of sealing assemblies of 4-axle all-metal gondola cars. In: Transact. of VNIIV, 35 , 21-26 [in Russian].
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  6. (1983) Norms for calculation and design of new and modernized cars (non self-propelled) of 1520 mm track railways of the Ministry of Railroads. Moscow, GosNIIV-VNIIZhT [in Russian].
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  8. RD 24.050.37-95: Freight and passenger cars. Testing methods on strength and running characteristics [in Russian].
  9. (2017) Gondola car of 12-4106-01 model. Program and procedure of testing of service life of the pivot assembly and side wall rack sealing assembly of a gondola car. PM 100-17/ITs [in Russian].


Received: 26.05.2018
Published: 19.07.2018.