Fretting Fatigue and Crack Initiation Analysis of 42CrMo4+QT and 34CrNiMo6+QT Steels

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F25%3A00386882" target="_blank" >RIV/68407700:21220/25:00386882 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.4028/p-0dSkTu" target="_blank" >https://doi.org/10.4028/p-0dSkTu</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/p-0dSkTu" target="_blank" >10.4028/p-0dSkTu</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fretting Fatigue and Crack Initiation Analysis of 42CrMo4+QT and 34CrNiMo6+QT Steels

Popis výsledku v původním jazyce

Reliable fretting fatigue prediction requires rigorous evaluation of analytical methods under realistic loading conditions. This study builds upon previous research on the fretting fatigue behavior of 42CrMo4+QT steel by incorporating new experimental data from square cross-section specimens tested under axial loading with various pad geometries. The application of a non-zero tensile mean bulk load promoted localized crack initiation near the specimen edges, leading to more asymmetric crack growth in the majority of cases unlike the more symmetric behavior observed under fully reversed loading (R = –1). Finite element analysis (FEA), along with the Dang Van and Papuga QCP methods, was employed to evaluate whether this behavior could be accurately modeled. In addition, a linear-elastic fracture mechanics approach was used to model and explain these observations. Furthermore, fretting fatigue tests on 34CrNiMo6+QT steel revealed that tribological effects governed crack initiation, in contrast to the stress-driven failure observed in 42CrMo4+QT. These findings enhance understanding of fretting fatigue mechanisms and improve predictive modeling approaches.

Název v anglickém jazyce

Fretting Fatigue and Crack Initiation Analysis of 42CrMo4+QT and 34CrNiMo6+QT Steels

Popis výsledku anglicky

Reliable fretting fatigue prediction requires rigorous evaluation of analytical methods under realistic loading conditions. This study builds upon previous research on the fretting fatigue behavior of 42CrMo4+QT steel by incorporating new experimental data from square cross-section specimens tested under axial loading with various pad geometries. The application of a non-zero tensile mean bulk load promoted localized crack initiation near the specimen edges, leading to more asymmetric crack growth in the majority of cases unlike the more symmetric behavior observed under fully reversed loading (R = –1). Finite element analysis (FEA), along with the Dang Van and Papuga QCP methods, was employed to evaluate whether this behavior could be accurately modeled. In addition, a linear-elastic fracture mechanics approach was used to model and explain these observations. Furthermore, fretting fatigue tests on 34CrNiMo6+QT steel revealed that tribological effects governed crack initiation, in contrast to the stress-driven failure observed in 42CrMo4+QT. These findings enhance understanding of fretting fatigue mechanisms and improve predictive modeling approaches.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/GF23-06130K" target="_blank" >GF23-06130K: Procedura pro odhad únavy v kontaktech: Lokální multiaxiální analýza napěťových a tribologických vlivů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

Key Engineering Materials

ISBN

—

ISSN

1662-9795

e-ISSN

1662-9795

Počet stran výsledku

13

Strana od-do

71-83

Název nakladatele

TRANS TECH PUBLICATIONS LTD

Místo vydání

Zurich

Místo konání akce

Ghent

Datum konání akce

29. 7. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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