Towards a grain-scale modeling of crack initiation in rolling contact fatigue - Part 2: Persistent slip band modeling

Rolling Contact Fatigue (RCF) is the result of crack initiation and propagation leading to surface damages. This study proposes a mesoscopic model for RCF crack initiation simulation. Finite Element Method (FEM) is used to obtain stresses using cubic elasticity. Persistent Slip Bands (PSBs) are mode...

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Bibliographic Details
Published in:Tribology international 2021-11, Vol.163, p.107173, Article 107173
Main Authors: Fourel, Lucas, Noyel, Jean-Philippe, Bossy, Etienne, Kleber, Xavier, Sainsot, Philippe, Ville, Fabrice
Format: Article
Language:English
Subjects:
Crack initiation
Crack propagation
Critical angle
Edge dislocations
Engineering Sciences
Fatigue
Fatigue cracks
Fatigue failure
Finite element method
Fracture mechanics
Grain boundaries
Materials
Materials and structures in mechanics
Mechanical engineering
Mechanics
Mechanics of materials
Mesoscopic
Misalignment
Modelling
Numerical analysis
Physics
Rolling contact
Solid mechanics
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Summary:Rolling Contact Fatigue (RCF) is the result of crack initiation and propagation leading to surface damages. This study proposes a mesoscopic model for RCF crack initiation simulation. Finite Element Method (FEM) is used to obtain stresses using cubic elasticity. Persistent Slip Bands (PSBs) are modeled using polycrystalline geometry and grain orientations. PSBs can pass through Grain Boundaries (GBs) if the misorientation of the adjacent grains is lower than a critical angle. The Tanaka-Mura micromechanical model is then used to calculate the number of loading cycles required to initiate cracks. The results are compared to previous models and experiments. Initiation depths appear to be consistent. •A polycrystalline model is developed for Rolling Contact Fatigue.•Fatigue crack initiation is calculated using Tanaka-Mura approach.•Persistent Slip Bands are modeled using a transmission algorithm based on crystal misorientations.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2021.107173