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Konstruktionsbewertung einer Güter‐Waggon‐Radsatzwelle: Ermüdungsschädigung im Vergleich zur Ermüdungstoleranz
Author(s) -
Beretta S.,
Carboni M.,
Cervello S.
Publication year - 2011
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201100916
Subject(s) - axle , damage tolerance , engineering , structural engineering , plan (archaeology) , forensic engineering , automotive engineering , computer science , geology , paleontology , algorithm , composite number
Railway axles are designed for an infinite life with admissible stress levels which correspond to generous safety factors applied to full‐scale fatigue properties of materials. Nevertheless, in order to keep an adequate safety level for such a long‐lasting component (an axle can typically run for 3×10 6 km) subjected to surface deterioration or corrosion, the design is complemented by “damage tolerance” analyses, in which it is assumed that a flaw could grow under service loads, in order to define an appropriate inspection plan. The ultimate “damage tolerance” approach is to design an axle so that there is no need for periodic NDT inspections except those carried out at overhauls (the so called “one million miles axle”). The aim of this paper is to describe the application of this concept to the axle of a freight train comparing this new design concept with the traditional fatigue design.