Numerical modeling of sub-surface initiated spalling in rolling contacts

Weinzapfel, Nick; Sadeghi, Farshid

doi:10.1016/j.triboint.2012.03.006

Cited by 69 publications

(32 citation statements)

References 20 publications

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“…Tsushima [60], Liu et al [61], Liu and Choi [62], Donzella and Petrogalli [63] and Leonel and Venturini [64] have defined a number of issues that are required while modelling crack propagation: high stress location, depth below surface and the direction and angle of crack inclination. Therefore, based on these preliminary studies, quite large number of models related to crack propagation have been developed [65][66][67][68][69][70][71][72][73][74][75][76][77][78]. The developed model assumes that the crack propagation process will continue and the induced stresses will be accumulated until the crack propagation limit is reached.…”

Section: Wear Transition Pointsmentioning

confidence: 99%

Dynamic modelling of wear evolution in rolling bearings

El‐Thalji

Jantunen

2015

Tribology International

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Section: Wear Transition Pointsmentioning

confidence: 99%

Dynamic modelling of wear evolution in rolling bearings

El‐Thalji

Jantunen

2015

Tribology International

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“…The micro crack generation is achieved by invoking a Voronoi partitioning procedure developed in 23 to simulate the crack propagation in the domain. Steps 2 to 7 are repeated successively for reach block of cycles the accumulated damage in the triangular element equals m critical , ie, the critical value of the damage variable D. 9.…”

Section: Simulation Of Fatigue Damage Using Femmentioning

confidence: 99%

“…This formulation of damage has been extensively used to characterize tensile fatigue, 28,29 torsion fatigue, 52 and rolling contact fatigue. 19,23,26,45,46 For the damage tensor approach in this paper the dissipation potential function ϕ is a scalar function of the Damage…”

Section: Fatigue Damage Formulationmentioning

confidence: 99%

An anisotropic damage model for tensile fatigue

Vijay

Sadeghi

2018

Fatigue Fract Eng Mat Struct

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Fatigue damage in materials is considered to be the effect of material degradation, and the dispersion in fatigue life is attributed to variability in microstructure. This paper presents a numerical model to simulate fatigue damage evolution using continuum damage mechanics to characterize material degradation. An explicit microstructure topology representation is achieved using Voronoi tessellations. Unlike conventional models which use a scalar approximation for damage, this model treats the damage variable as an anisotropic tensor. The model is used to simulate tensile fatigue failure in thin steel specimen. The fatigue life estimations from the model compares well with published experimental results. The results predict a high variability in fatigue life that is characteristic of metals and alloys, as compared with the existing isotropic damage models available in the literature. The model was also used to study the influence of material inhomogeneity on fatigue life dispersion.

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“… τ r and m are material specific parameters established from torsional fatigue experimentation. This modified damage law has been implemented in multiple RCF modeling procedures . Equations and can be used to calculate the energy dissipation in the material microstructure as a function of stress cycles.…”

Section: Damage Accumulationmentioning

confidence: 99%

A novel approach for modeling retained austenite transformations during rolling contact fatigue

Sadeghi

Chen

Wang

et al. 2017

Fatigue Fract Eng Mat Struct

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Retained austenite (RA) transformation in martensitic steels subjected to rolling contact fatigue (RCF) is a well‐established phenomenon. In this investigation, a novel approach is developed to predict martensitic transformations of RA in steels subjected to RCF. In order to achieve the objectives, a 2‐dimensional finite element model was developed to determine subsurface stresses due to rolling contact. These stresses are utilized within a continuum damage mechanics framework to determine RA transformations as a function of depth and cycles. Phase transformations were determined by comparing the required thermodynamic driving force for transformations to the energy dissipation of the microstructure. The results obtained from the combined FEA and continuum damage mechanics model were corroborated to the experimental results for RA decomposition as a function of depth and cycle for SAE 52100 steel. The results obtained are in good agreement with observed RA decomposition and DER formation as compared with the experimental results.

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Numerical modeling of sub-surface initiated spalling in rolling contacts

Cited by 69 publications

References 20 publications

Dynamic modelling of wear evolution in rolling bearings

Dynamic modelling of wear evolution in rolling bearings

An anisotropic damage model for tensile fatigue

A novel approach for modeling retained austenite transformations during rolling contact fatigue

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