Partitioned fluid-structure methods applied to the solution of elastohydrodynamic conformal contacts

The functional characteristics of statically-loaded journal bearings operating in the elastohydrodynamic lubrication (EHL) regime are evaluated by means of three partitioned fluid-structure coupling methods. Widely used in other areas but yet unexplored in the context of EHL problems related to jour...

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Bibliographic Details
Published in:Tribology international 2015-01, Vol.81, p.321-332
Main Authors: Profito, Francisco J., Zachariadis, Demetrio C.
Format: Article
Language:English
Subjects:
Bearing
Conformal contact
Elastohydrodynamic lubrication
Elastohydrodynamics
Flexible journal bearings
Joining
Journal bearings
Mathematical analysis
Mathematical models
Numerical simulation
Three dimensional
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Summary:The functional characteristics of statically-loaded journal bearings operating in the elastohydrodynamic lubrication (EHL) regime are evaluated by means of three partitioned fluid-structure coupling methods. Widely used in other areas but yet unexplored in the context of EHL problems related to journal bearings, these methods permit the use of optimized codes to solve the hydrodynamic and structural equations separately employing different techniques specialized in each type of equation. In this study, lubricant pressures are calculated using the isothermal Reynolds equation and the p−θ mass-conserving formulation is adopted for the computation of cavitation effects. An appropriate substructuring technique is applied in order to reduce the order of the bearing 3D linear-elastic finite element model. The efficiency and robustness of the partitioned fluid-structure coupling methods presented are assessed for two extreme situations of high deformation and high load conditions of a typical internal combustion engine connecting-rod big-end bearing. Numerical results evidence that partitioned fluid-structure coupling methods consist in a very efficient simulation tool for EHL journal bearing analyses. •Use of three partitioned methods for the EHL solution of static journal bearings.•Focus on the PGMA and IQN-ILS methods, unexplored in tribological simulations.•Evaluation of the methods for two extreme static conditions (high-load/deformation).•IQN-ILS method showed the best performance, followed by the PGMA and PGMF methods.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2014.09.007