Fatigue damage mechanism of railway wheels under lateral forces

Zhou, Guiyuan; He, Chenggang; Wen, Guang; Liu, Qiyue

doi:10.1016/j.triboint.2015.07.008

Cited by 15 publications

(1 citation statement)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[6][7][8] Laboratory methods are routinely used: they include full-scale Laboratory experiments, 9 scale-down tests, 10 and bench tests by twin-disc machines. [11][12][13][14] In twin-disk tests, disk-shaped rail-wheel couples, with controlled contact load, rotate at variable speed, for predefined time intervals. It is therefore possible to perform accelerated wear and RCF tests with nominal contact pressures varying over wide ranges, using different materials, and in different operating conditions.…”

Section: Introductionmentioning

confidence: 99%

A novel optical apparatus for the study of rolling contact wear/fatigue based on a high-speed camera and multiple-source laser illumination

Bodini

Sansoni

Lancini

et al. 2016

Review of Scientific Instruments

View full text Add to dashboard Cite

Real-time lock-in imaging by a newly developed high-speed image-processing charge coupled device video camera Rev. Sci. Instrum. 74, 1393 (2003) Rolling contact wear/fatigue tests on wheel/rail specimens are important to produce wheels and rails of new materials for improved lifetime and performance, which are able to operate in harsh environments and at high rolling speeds. This paper presents a novel non-invasive, all-optical system, based on a high-speed video camera and multiple laser illumination sources, which is able to continuously monitor the dynamics of the specimens used to test wheel and rail materials, in a laboratory test bench. 3D macro-topography and angular position of the specimen are simultaneously performed, together with the acquisition of surface micro-topography, at speeds up to 500 rpm, making use of a fast camera and image processing algorithms. Synthetic indexes for surface micro-topography classification are defined, the 3D macro-topography is measured with a standard uncertainty down to 0.019 mm, and the angular position is measured on a purposely developed analog encoder with a standard uncertainty of 2.9 • . The very small camera exposure time enables to obtain blur-free images with excellent definition. The system will be described with the aid of end-cycle specimens, as well as of in-test specimens. Published by AIP Publishing. [http://dx

show abstract