Mechanisms of mixed mode fatigue crack propagation at rail butt-welds

被引：42

作者：

Desimone, H ^{[1
]}

Beretta, S ^{[1
]}

机构：

[1] Politecn Milan, Dipartimento Meccan, I-20158 Milan, Italy

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2006年 / 28卷 / 5-6期

关键词：

mixed mode; rails; butt welds; fatigue; crack propagation;

D O I：

10.1016/j.ijfatigue.2005.07.044

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In the present paper, the fatigue crack propagation of longitudinal flaws starting in butt-welded joints of rails is analysed. Firstly Finite Element simulations are carried out, in order to determine the actual stress intensity factor histories caused by the passage of the wheel over the rail. Simulations show that fatigue crack growth is dominated by an out-of-phase Mode I-Mode 11 mechanism with an overlapping of about 180 degrees. Then, mixed-mode fatigue test experiments have been designed in order to reproduce in-service conditions at laboratory test level. For this purpose, tubular specimens have been subjected to mixed-mode loading (reversal torsion combined with axial tension/compression). The crack growth propagation dominated by the shear has been confirmed. At the end of the paper, the conditions to obtain the shear mode crack propagation are discussed and the kinetics data are presented. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：635 / 642

页数：8

共 29 条

[1] Boundary element analysis of surface initiated rolling contact fatigue cracks in wheel/rail contact systems [J].

Akama, M ;

Mori, T .

WEAR, 2002, 253 (1-2) :35-41

[2]

Anderson T.A., 1995, FRACTURE MECH

[3]

BAVILA S, 2003, THESIS POLITECNICO M

[4] Mode II fatigue failures at rail butt-welds [J].

Beretta, S ;

Boniardi, M ;

Carboni, M ;

Desimone, H .

ENGINEERING FAILURE ANALYSIS, 2005, 12 (01) :157-165

[5] Numerical stress analysis of rail rolling contact fatigue cracks [J].

Bogdanski, S ;

Olzak, M ;

Stupnicki, J .

WEAR, 1996, 191 (1-2) :14-24

[6] Modelling the three-dimensional behaviour of shallow rolling contact fatigue cracks in rails [J].

Bogdanski, S ;

Brown, MW .

WEAR, 2002, 253 (1-2) :17-25

[7] SHEAR MODE CRACK-GROWTH AND ROLLING-CONTACT FATIGUE [J].

BOLD, PE ;

BROWN, MW ;

ALLEN, RJ .

WEAR, 1991, 144 (1-2) :307-317

[8] Rail defects: an overview [J].

Cannon, DF ;

Edel, KO ;

Grassie, SL ;

Sawley, K .

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2003, 26 (10) :865-886

[9] The inspection of thermite welds in railroad rail - a perennial problem [J].

Clark, R ;

Singh, S .

INSIGHT, 2003, 45 (06) :387-393

[10]

DESIMONE H, 2004, P 7 INT C BIAX MULT

← 1 2 3 →