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RESEARCH PAPERS

A Nonlinear Structure Based Elastohydrodynamic Analysis Method for Connecting Rod Big End Bearings of High Performance Engines

[+] Author and Article Information
Fabrizio A. Stefani, Alessandro U. Rebora

University of Genoa, Department of Mechanics and Machine Design, Via all’Opera Pia 15, A-16145 Genoa, Italy

J. Tribol 126(4), 664-671 (Nov 09, 2004) (8 pages) doi:10.1115/1.1759341 History: Received November 26, 2002; Revised January 14, 2004; Online November 09, 2004
Copyright © 2004 by ASME
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References

Oh,  K. P., 1984, “The Numerical Solution of Dynamically Loaded Elastohydrodynamic Contact as a Nonlinear Complementarity Problem,” ASME J. Tribol., 106, pp. 88–95.
Goenka,  P. K., and Oh,  K. P., 1986, “The Elastohydrodynamic Solution of a Journal Bearing Under Dynamic Loading,” ASME J. Tribol., 107, pp. 389–395.
Goenka,  P. K., and Oh,  K. P., 1986, “An Optimum Short Bearing Theory for the Elastohydrodynamic Solution of Journal Bearings,” ASME J. Tribol., 108, pp. 294–299.
Rohde,  S. M., and Li,  D. F., 1980, “A Generalized Short Bearing Theory,” ASME J. Lubr. Technol., 102, No. 3, pp. 278–282.
Kumar,  A., Goenka,  P. K., and Booker,  J. F., 1990, “Modal Analysis of Elastohydrodynamic Lubrication: a Connecting Rod Application,” ASME J. Tribol., 112, pp. 524–534.
Bonneau,  D., Guines,  D., Frene,  J., and Toplosky,  J., 1995, “EHD Analysis, Including Structural Inertia Effects and a Mass-Conserving Cavitation Model,” ASME J. Tribol., 117, pp. 540–547.
Knoll,  G., Lang,  J., and Rienacker,  A., 1996, “Transient EHD Connecting Rod Analysis: Full Dynamic Versus Quasi-Static Deformation,” ASME J. Tribol., 118, pp. 349–355.
Grente, C., Ligier, J. L., Toplosky, J., and Bonneau, D., 2000, “The Consequence of Performance Increases of Automotive Engines on the Modelisation of Main and Connecting-Rod Bearings,” Proc. of 27th Leeds-Lyon Symposium on Tribology.
Stefani,  F., and Rebora,  A., 2002, “Finite Element Analysis of Dynamically Loaded Journal Bearings: Influence of the Bolt Preload,” ASME J. Tribol., 124, pp. 486–493.
Stefani, F., and Rebora, A., 2001, “Elastohydrodynamic Analysis of a Connecting Rod Bearing for High Performance Engines,” Proc. of the 2nd World Tribology Congress.
Stefani, F., and Rebora, A., 2002, “EHD Analysis of a Connecting Rod Bearing for High Performance Engines: Structural Inertia Effect,” Proc. of the 3rd AIMETA International Tribology Conference.
McIvor,  J. D. C., and Fenner,  D. N., 1989, “Finite Element Analysis of Dynamically Loaded Flexible Journal Bearings: A Fast Newton-Raphson Method,” ASME J. Tribol., 111, pp. 597–604.
Kohnke, P., 2001, ANSYS Theory Manual, Rev. 5.7, Twelfth Edition, SAS IP, Inc.
Bathe, K. J., 1982, Finite Element Procedures in Engineering Analysis, Prentice-Hall, Englewood Cliffs
Piffeteau,  S., Souchet,  D., and Bonneau,  D., 2000, “Influence of Thermal and Elastic Deformations on Connecting-Rod Big End Bearing Lubrication Under Dynamic Loading,” ASME J. Tribol., 122, pp. 181–191.
Murty,  K. G., 1974, “Note on a Bard-type Scheme for Solving the Complementarity Problem,” Journal of the Operational Research Society of India, 11, pp. 123–130.
Prat,  P., Vergne,  Ph., and Sicre,  J., 1994, “New Results in High Pressure and Low Temperature Rheology of Liquid Lubricant for Space Application,” ASME J. Tribol., 116, pp. 629–634.

Figures

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Flow chart of the proposed algorithm
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Two-dimensional FEM model of a high performance engine connecting rod big end bearing
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(a) Bearing cyclic dynamic loads at 8500 r.p.m.; (b) bearing cyclic dynamic loads at 10,500 r.p.m.; and (c) bearing cyclic dynamic loads at 12,000 r.p.m.
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Cyclic variation of minimum film thickness at 8500 r.p.m.: three-dimensional results versus two-dimensional results
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Cyclic variation of minimum film thickness at 10,500 r.p.m.: influence of sliding
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Bearing deformed shape at 400 deg crank angle
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Pressure distribution along bearing surface at 400 deg crank angle
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Cyclic variation of minimum film thickness at 10,500 r.p.m.: influence of chamfer
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Cyclic variation of minimum film thickness at 12,000 r.p.m.: linear model results and nonlinear model results
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Cyclic variation of minimum film thickness at 12,000 r.p.m. rotation speed: bolt preload influence

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