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  4. Lifetime prediction of ceramic components - a case study on hybrid rolling contact
 
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2017
Journal Article
Title

Lifetime prediction of ceramic components - a case study on hybrid rolling contact

Abstract
In this study, fatigue life predictions were made for silicon nitride components undergoing hybrid ceramic-steel rolling contact. Three-dimensional stress fields were extracted using a bespoke finite element model and subsequently used to calculate stress intensity factors by means of the weight function method. Crack-growth rates were estimated by assuming crack growth to follow a Paris power-law expression whose material parameters were obtained from four-point bending fatigue experiments under fluctuating tensile load (R = 0.1) and fully-reversed alternating load (R = −1). The crack-growth behavior obtained from the calculations was compared with experimental results obtained from twin-disk-type RCF experiments. The calculated lifetime predictions were in accordance with the experimental results. Crack formation and propagation was found more likely to occur in locations undergoing alternating load rather than those undergoing pure fluctuating tensile load.
Author(s)
Khader, I.
Fraunhofer-Institut für Werkstoffmechanik IWM  
Rasche, S.
Montanuniversität Leoben
Lube, T.
Raga, R.
Fraunhofer-Institut für Werkstoffmechanik IWM  
Degenhardt, U.
FCT Ingenieurkeramik GmbH, Frankenblick
Kailer, A.
Fraunhofer-Institut für Werkstoffmechanik IWM  
Journal
Engineering fracture mechanics  
Project(s)
ROLICER  
Funder
European Commission EC  
Open Access
File(s)
Download (1.8 MB)
DOI
10.24406/publica-r-249539
10.1016/j.engfracmech.2016.10.014
Language
English
Fraunhofer-Institut für Werkstoffmechanik IWM  
Keyword(s)
  • silicon nitride

  • rolling-contact fatigue

  • stress intensity factor

  • weight function method

  • lifetime prediction

  • negative load ratio

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