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2018 №08 (01) DOI of Article
2018 №08 (03)

TPWJ, 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

Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                      0957-798X (print)
Issue                       #8, 2018 (August)
Pages                      7-12
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
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