期刊
TRIBOLOGY INTERNATIONAL
卷 101, 期 -, 页码 152-163出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2016.04.023
关键词
Frictional rolling; Wheel-rail contact; Two-point contact; Non-steady state
By considering real wheel and track geometry and structures, as well as their coupled interaction, an explicit finite element method is applied to simulate the transition of wheel-rail rolling from single point tread contact to two-point tread-flange contact. The evolutions of the contact position, stress magnitude and, direction, adhesion-slip distribution, and wheel-rail relative velocities in the two contact patches are considered to investigate the transient dynamic effects during the contact transition. Important findings include that the transition to two-point contact can result in friction saturation and excite waves in the contact, causing local intensification and relaxation of compression, as well as turbulence of the micro-slip; the local relative velocity in the contact patch is a good measure of the dynamic effects. (C) 2016 Elsevier Ltd. All rights reserved.
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