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2018 №08 (01) DOI of Article
10.15407/tpwj2018.08.02 		2018 №08 (03)

The Paton Welding Journal 2018 №08


The Paton Welding Journal, 2018, #8, 7-12 pages
 

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

A.G. Rejdemejster1, V.A. Kalashnik1, V.V. Knysh2 and S.A. Solovej2


1Acad. V. Lazaryan Dnipropetrovsk National University of Railway Transport 2 Lazaryan Str., 49010, Dnepr, Ukraine. E-mail: dnuzl@diit.edu.ua
2E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

The paper presents the results of experimental-calculation studies of fatigue resistance of full-scale samples of the bolster 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 assemblies. Their fatigue strength is equal from 12.1 MPa (side wall rack sealing assembly) up to 33.6 MPa (bolster assembly). Sections of fatigue cracks initiation, regularities of their propagation and fatigue limit of the structure were established. As shown by calculation of the car body stressed state, the fatigue limit values ensure operation for 34.1 and 57.0 years for the bolster assembly and side wall rack sealing assembly, respectively, before appearance of the fatigue crack. 9 Ref., 2 Tables, 8 Figures.
Keywords: welded elements of freight cars, bolster assembly, side wall rack sealing assembly, fatigue resistance, stressed state
 
Received:                26.05.18
Published:               01.10.18
 
References
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  2. Khilov, I.A., Afanasiev, A.E. (2009) Selection of parameters of side wall rack sealing assembly of a gondola car. 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 wall sealing assemblies of 4-axle all-metal gondola cars. In: of VNIIV, 35, 21–26 [in Russian].
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  9. (2017) Gondola car of 12-4106-01 model. Program and procedure of testing of service life of the bolster assembly and side wall rack sealing assembly of a gondola car. PM 100-17/Its [in Russian].