On-line 2D monitoring of rolling contact fatigue/wear phenomena in dry tests

24th A.I.VE.LA. Annual Meeting

Bodini, I.^1 ; Petrogalli, C.^1 ; Mazzù, A.^1 ; Faccoli, M.^1 ; Lancini, M.^1 ; Pasinetti, S.^2 ; Sansoni, G.^1 ; Docchio, F.^1

Department of Mechanical and Industrial Engineering, via Branze, 38, Brescia

25123, Italy^1

Department of Information Engineering, via Branze, 38, Brescia

25123, Italy^2

关键词: Blob analysis;    Intermediate state;    Key elements;    Laser illumination;    Optical monitoring systems;    Quantitative information;    Railway wheels;    Rolling contact fatigue;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/882/1/012012/pdf
DOI  :  10.1088/1742-6596/882/1/012012

来源: IOP

【 摘 要 】

We present the in-field use of a recently developed on-line, real time, optical monitoring system for bi-disk rolling contact tests on railway-wheel- and rail- steel disks, based on laser illumination and a high-speed camera. Qualitative, as well as quantitative information can be obtained by the use of specific indexes derived from the images using blob analysis. Monitoring the tests provides information about the initial transients of turning-crest removal, on the steady state reached, and on the dynamics of the surface in between. Blob anisotropy is a key element to draw information of the mechanisms governing this intermediate state.