The influence of plastic deformations on growth of subsurface rolling contact fatigue cracks in railway wheels
Artikel i vetenskaplig tidskrift, 2006

A subsurface rolling contact fatigue crack in a railway wheel is studied. Stress and strain fields are evaluated by elasto-plastic finite-element simulations. The robustness and validity of the numerical model are investigated. A suitable measure to characterize crack propagation is then sought. Numerical results show that the effect of crack tip plasticity is small for cases studied, indicating that linear elastic fracture mechanics approaches are applicable. Further, the magnitudes of the stress intensity factor in mode I, KI, are negative implying crack closure. Motivated by these findings, the stress intensity factor range in mode II, ΔKII, is employed as a measure of crack propagation. Finally, studies are carried out to quantify the effects of altered contact load conditions and crack face friction.

fatigue crack growth

railway wheels

numerical simulations

plastic deformation

parametric study

fracture mechanics

Rolling contact fatigue

Författare

Eka Lansler

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Anders Ekberg

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Elena Kabo

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Hans Andersson

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit

0954-4097 (ISSN)

Vol. 220 4 461-473

Ämneskategorier

Teknisk mekanik

DOI

10.1243/0954409JRRT37

Mer information

Skapat

2017-10-07