Effect of Residual Stresses on Safe Life Prediction of Railway Axles

被引:4
作者
Schindler, Hans-Jakob [1 ]
机构
[1] Mat Tec AG, Unterer Graben 27, CH-8401 Winterthur, Switzerland
来源
ESIS TC24 WORKSHOP - INTEGRITY OF RAILWAY STRUCTURES | 2017年 / 4卷
关键词
Railway axle; safe life; fatigue; residual stress; cut-compliance method; press-fit; crack growth;
D O I
10.1016/j.prostr.2017.07.008
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Residual stresses play an important role in fatigue crack growth in railway axles. Due to crack closure, they affect not only the stress ratio R but add directly to the effective range of the cyclic crack load in terms of stress intensity factor. In order to account for this effect in a safe life analysis, the stress intensity factor K-Irs, due to the residual stress is required. The cut-compliance method is a suitable means to determine K-Irs,. The method is described briefly, and by an example it is shown how it can be applied to railway axles. The obtained residual stresses turned out to be compressive in the vicinity of the surface, which is beneficial for the fatigue performance of the axle. If these stresses are accounted for in the crack growth law, the calculated safe life in case of a pre-existing crack-like defect is increased dramatically. Furthermore, the effect of the press-fit of the wheels is investigated. The corresponding stresses were calculated by FEM. Actually, these stresses represent another type of residual stresses and can be superimposed to the measured residual stresses in the analysis. They also affect the crack growth rate significantly. Copyright (C) 2017. The Authors. Published by Elsevier B.V.
引用
收藏
页码:48 / 55
页数:8
相关论文
共 9 条
[1]   Variable amplitude fatigue crack growth in a mild steel for railway axles: Experiments and predictive models [J].
Beretta, S. ;
Carboni, M. .
ENGINEERING FRACTURE MECHANICS, 2011, 78 (05) :848-862
[2]  
Elber W., 1970, Engineering Fracture Mechanics, V2, P37, DOI 10.1016/0013-7944(70)90028-7
[3]   Damage tolerance of railway axles - The issue of transferability revisited [J].
Gaenser, H. -P. ;
Maierhofer, J. ;
Tichy, R. ;
Zivkovic, I. ;
Pippan, R. ;
Luke, M. ;
Varfolomeev, I. .
INTERNATIONAL JOURNAL OF FATIGUE, 2016, 86 :52-57
[4]  
Hobbacher A., 2004, 1319650315112703 IIW
[5]   Fatigue crack growth in railway axles: Assessment concept and validation tests [J].
Luke, M. ;
Varfolomeev, I. ;
Luetkepohl, K. ;
Esderts, A. .
ENGINEERING FRACTURE MECHANICS, 2011, 78 (05) :714-730
[6]   A fracture mechanics approach to estimate the fatigue endurance of welded t-joints including residual stress effects [J].
Schindler, H. J. ;
Martens, H. J. ;
Soennichsen, S. S. .
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2007, 30 (03) :206-213
[7]   Experimental determination of stress intensity factors due to residual stresses [J].
Schindler, HJ ;
Cheng, W ;
Finnie, I .
EXPERIMENTAL MECHANICS, 1997, 37 (03) :272-277
[8]  
Schindler HJ, 1997, P 5 INT C RES STRESS, V1, P682
[9]  
Wu XR, 1991, Weight functions and stress intensity factor solutions