TY - JOUR
T1 - An approach to determine a critical size for rolling contact fatigue initiating from rail surface defects
AU - Li, Zili
AU - Zhao, Xin
AU - Dollevoet, Rolf
PY - 2016
Y1 - 2016
N2 - A methodology for the determination of a critical size of surface defects, above which RCF can initiate, has been developed and demonstrated with its application to the passive type of squats under typical Dutch railway loading conditions. Such a methodology is based on stress evaluation of transient rolling contact at the defects, for which a detailed 3D frictional rolling contact model is integrated in the vehicle–track interaction system. Through comparing the maximal von Mises stress at defects of different sizes with the tensile strength of the rail material, the critical size is derived for squats. Observations during a field monitoring test show a good validation of the determined critical size. In practice, the critical size can be used for distinguishing between light squats and trivial defects by visual inspection or by automatic image recognition, so that false statistics of squats can be reduced or prevented. With necessary modifications and improvements, the developed methodology may also be applied to RCF of other rolling contact pairs in general, such as bearings and gears.
AB - A methodology for the determination of a critical size of surface defects, above which RCF can initiate, has been developed and demonstrated with its application to the passive type of squats under typical Dutch railway loading conditions. Such a methodology is based on stress evaluation of transient rolling contact at the defects, for which a detailed 3D frictional rolling contact model is integrated in the vehicle–track interaction system. Through comparing the maximal von Mises stress at defects of different sizes with the tensile strength of the rail material, the critical size is derived for squats. Observations during a field monitoring test show a good validation of the determined critical size. In practice, the critical size can be used for distinguishing between light squats and trivial defects by visual inspection or by automatic image recognition, so that false statistics of squats can be reduced or prevented. With necessary modifications and improvements, the developed methodology may also be applied to RCF of other rolling contact pairs in general, such as bearings and gears.
KW - friction
KW - high frequency wheel–rail interaction
KW - rail surface defect
KW - Rolling contact fatigue
KW - squat
KW - von Mises stress
UR - http://www.scopus.com/inward/record.url?scp=84973638081&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:98b23afb-2aa5-42f2-85df-4c0858d9a171
U2 - 10.1080/23248378.2016.1194775
DO - 10.1080/23248378.2016.1194775
M3 - Article
AN - SCOPUS:84973638081
SN - 2324-8378
VL - 5
SP - 16
EP - 37
JO - International Journal of Rail Transportation
JF - International Journal of Rail Transportation
IS - 1
ER -