Probabilistic fatigue assessment for railway axles and derivation of a simple format for damage calculations

被引:39
作者
Beretta, S. [1 ]
Regazzi, D. [1 ]
机构
[1] Politecn Milan, Dipartimento Meccan, Via La Masa 1, I-20156 Milan, Italy
关键词
Railway axles; Fatigue; Failure probability; Safety factor; CORROSION-FATIGUE; INITIATION; DESIGN; LIFE;
D O I
10.1016/j.ijfatigue.2015.08.010
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
This paper describes a procedure for the determination of railway axle risk of fatigue failure under service loading for a simple fatigue assessment compliant to modern structural recommendations. After an initial review of reliability assessment under fatigue, a fully probabilistic approach is outlined, whose input data for the fatigue damage obtained with the EURAXLES project are briefly summarized. Then, a series of Montecarlo simulations was carried out in order to determine the maximum allowable stress for a given axle made of EA4T and EA1N under service conditions identified by different load spectra from the literature. Results have been obtained in terms of a safety factor for damage calculations that allows designers to adopt a simple semi-probabilistic approach for designing axles for a target reliability against fatigue. The application of this procedure to a railway axle then shows how safety factors should be have to be further increased for taking into the prospective presence of impact damages. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:13 / 23
页数:11
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