Stress Based Model for General Rolling Contact with Surface and Subsurface Survival: Application to Gears with Material Inhomogeneities

A previously developed and validated model for the life of rolling/sliding heavily-loaded lubricated contacts, that separates surface and subsurface survival is now adapted to include the effect of material inhomogeneities and it is applied to the case of spur gear contact life. The previously used...

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Bibliographic Details
Published in:Tribology Online 2023/10/31, Vol.18(6), pp.280-291
Main Authors: Morales-Espejel, Guillermo Enrique, Félix-Quiñonez, Armando, Boffy, Hugo
Format: Article
Language:English
Subjects:
Bonding
Computational efficiency
Computing time
Contact pressure
Contact stresses
Elastic media
Engineering Sciences
fatigue
Fatigue limit
gears
Inclusions
inhomogeneities
Inhomogeneity
Modulus of elasticity
multigrid
Multigrid methods
Personal computers
Rolling contact
rolling/sliding contact life
sintered materials
Solvers
Spur gears
surface life
Survival
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Summary:A previously developed and validated model for the life of rolling/sliding heavily-loaded lubricated contacts, that separates surface and subsurface survival is now adapted to include the effect of material inhomogeneities and it is applied to the case of spur gear contact life. The previously used FFT-based, homogeneous elastic dry contact solver (for the calculation of pressure and subsurface stresses) is now replaced by a previously developed Lamé’s equations solver based on Multigrid methods that can handle bonded inhomogeneities in an elastic media. Despite the increase in computing time by this change it still is able to generate gear solution calculations within one hour computing time in a personal computer. The effect of bonded inhomogeneities in rolling contact fatigue (RCF) is investigated for a variety of inclusion geometries and Young’s modulus values. The results show how deterministically, or randomly distributed inclusions might shorten the RCF life of a component. In engineering practice this can be reflected in a reduction of the fatigue limit used.
ISSN:1881-2198
1881-218X
1881-2198
DOI:10.2474/trol.18.280