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Možný vznik tečných relaxačních kmitů v povrchové vrstvě železničního kola

Autoři: Beneš Libor | Kaloč Rudolf | Guzman Ballivián

Rok: 2004

Druh publikace: článek ve sborníku

Název zdroje: Perspektivní technologie a materiály pro technické aplikace

Název nakladatele: Univerzita Pardubice a Asociace strojních inženýrů - MI Pardubice

Místo vydání: Pardubice

Strana od-do: 22-30

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Možný vznik tečných relaxačních kmitů v povrchové vrstvě železničního kola	The aim of this paper is a study of the microstructure transformations that are induced by rolling contact friction and wear in the rail - wheel - system, from the materials as well as the mechanical point of view. By studying the surface changes the relationship between load strength and the induced microstructure changes in the surface and subsurface layers of railway wheels and rails were examined. These results were discussed in relation to both the deformation mechanism at the wear surface and the temperatures likely to be reached at the wheel-rail contact when the layer is formed. With respect to the intense damage of the contact bodies, the dangerous tangential motion of the superficial regions, so called ?relaxation vibrations? of a thin surface layer, was proposed as a cause of these studied mechanisms.	kontakt kolo-kolejnice;povrchová vrstva;relaxační kmity
eng	Possible origin of the tangential relaxation vibrations in surface layer of railway wheel	The aim of this paper is a study of the microstructure transformations that are induced by rolling contact friction and wear in the rail - wheel - system, from the materials as well as the mechanical point of view. By studying the surface changes the relationship between load strength and the induced microstructure changes in the surface and subsurface layers of railway wheels and rails were examined. These results were discussed in relation to both the deformation mechanism at the wear surface and the temperatures likely to be reached at the wheel-rail contact when the layer is formed. With respect to the intense damage of the contact bodies, the dangerous tangential motion of the superficial regions, so called ?relaxation vibrations? of a thin surface layer, was proposed as a cause of these studied mechanisms.	railway wheel-rail contact;surface layer;relaxation vibration

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