TY - JOUR
T1 - Simulation and experiment based investigations of squat formation mechanisms
AU - Bernsteiner, Christof
AU - Meierhofer, Alexander
AU - Trummer, Gerald
AU - Marte, Christof
AU - Scheriau, Stephan
AU - Six, Klaus
AU - Dietmaier, Peter
PY - 2019
Y1 - 2019
N2 - In this work, possible formation mechanisms of squats were investigated based on field and laboratory measurements, full-scale wheel-rail test rig experiments and a newly developed simulation tool. Wheel-rail contact conditions were found, which can lead to cracks in or to outbreaks of a white etching layer (WEL) on a rail surface. Under certain condition this also can lead to cracks growing into the bulk material. Furthermore, according to the simulation results, geometrical deviations of the rail surface - as for example outbreaks of WELs - can remain at the rail surface and grow up to a size comparable to that of squats. It has been shown, that the crack initiation potential in the area of such permanent geometrical deviations can be increased. Previous article in issue
AB - In this work, possible formation mechanisms of squats were investigated based on field and laboratory measurements, full-scale wheel-rail test rig experiments and a newly developed simulation tool. Wheel-rail contact conditions were found, which can lead to cracks in or to outbreaks of a white etching layer (WEL) on a rail surface. Under certain condition this also can lead to cracks growing into the bulk material. Furthermore, according to the simulation results, geometrical deviations of the rail surface - as for example outbreaks of WELs - can remain at the rail surface and grow up to a size comparable to that of squats. It has been shown, that the crack initiation potential in the area of such permanent geometrical deviations can be increased. Previous article in issue
U2 - 10.1016/j.wear.2019.203093
DO - 10.1016/j.wear.2019.203093
M3 - Article
SN - 0043-1648
VL - 440-441
JO - Wear
JF - Wear
M1 - 203093
ER -