Investigation of critical flaws in railway wheels

  • The fracture of tread-braked monobloc railway wheels is predominantly influenced by the magnitude of the tensile residual stresses in the rim of the wheel. As a consequence of the scatter in fracture toughness and magnitude of the residual stresses, different values of the critical flaw sizes are obtained. A simulation process is adopted which takes into consideration the probability distribution of the stresses and fracture toughness. The flaw size which guarantees a survival probability of 90The fracture of tread-braked monobloc railway wheels is predominantly influenced by the magnitude of the tensile residual stresses in the rim of the wheel. As a consequence of the scatter in fracture toughness and magnitude of the residual stresses, different values of the critical flaw sizes are obtained. A simulation process is adopted which takes into consideration the probability distribution of the stresses and fracture toughness. The flaw size which guarantees a survival probability of 90 per cent will be chosen as the representative value of the minimum critical flaw size. A comparison is made with the critical sizes observed at service failures to illustrate the practical application of the probability distribution approach. Copyright © 1985 Published by Elsevier Ltd.show moreshow less

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Metadaten
Author:Karl-Otto EdelGND
ISSN:0167-8442
Parent Title (English):In: Theoretical and applied fracture mechanics Vol. 4 (1985) 2, pp 109–116
Document Type:Article
Language:English
Year of Publishing:1985
Date of Publication (online):2014/01/29
Release Date:2014/01/29
First Page:109
Last Page:116
Dewey Decimal Classification:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
University Bibliography:Hochschulbibliographie
Licence (German):Creative Commons - Namensnennung, Nicht kommerziell, Keine Bearbeitung