Únavová životnost ložiskové oceli v ultravysokocyklové oblasti

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Fatigue lifetime of bearing steel in ultra-high-cycle region

Popis výsledku v původním jazyce

Experimental fatigue life data in ultra-high-cycle region have been shown to exhibit sometimes ?two-stage? S-N curves.These observations have been performed on high strength bearing steels using rotating bending.This effect is generally related to different types of crack initiation. Some authors expressed the opinion that the two-stage S-N curves are related rather to the type of loading than to the material. A direct comparison of S-N curves of bearing steel determined in uniaxial tension-compressionand rotating bending was performed. An obvious difference in the S-N curve shape was observed. Continuously increasing number of cycles to fracture with decreasing stress amplitude characterizes the tension-compression S-N data, whereas pronounced two-step curve is characteristic of rotating bending tests.It has been shown that the rotating bending S-N data fit the tension-compression ones when the correction in terms of local stress amplitude at the crack initiation site is applied.

Název v anglickém jazyce

Fatigue lifetime of bearing steel in ultra-high-cycle region

Popis výsledku anglicky

Experimental fatigue life data in ultra-high-cycle region have been shown to exhibit sometimes ?two-stage? S-N curves.These observations have been performed on high strength bearing steels using rotating bending.This effect is generally related to different types of crack initiation. Some authors expressed the opinion that the two-stage S-N curves are related rather to the type of loading than to the material. A direct comparison of S-N curves of bearing steel determined in uniaxial tension-compressionand rotating bending was performed. An obvious difference in the S-N curve shape was observed. Continuously increasing number of cycles to fracture with decreasing stress amplitude characterizes the tension-compression S-N data, whereas pronounced two-step curve is characteristic of rotating bending tests.It has been shown that the rotating bending S-N data fit the tension-compression ones when the correction in terms of local stress amplitude at the crack initiation site is applied.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Fracture of nano and engineering materials and structures

ISBN

1-4020-4971-4

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

1-6

Název nakladatele

Springer

Místo vydání

Dordrecht

Místo konání akce

Alexandroupolis

Datum konání akce

3. 7. 2006

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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