Thermomechanical analysis of oscillatory pin-bushing performance
Keywords:
thermally induced seizure, scuffing, oscillating pin-bushing, earthmoving equipmentAbstract
This paper presents a Finite Element Analysis (FEA) to effectively describe the thermomechanical interactions of a heavily loaded oscillating pin-bushing pair used in earthmoving equipment. An objective of this analysis is to predict the time to failure when a pin-bushing pair is subjected to heavy loads and to improve performance and increase the Mean Time between Failures (MTBF). FEA results reveal that two types of failure can take place depending on different operating parameters. They are: (i) Thermally Induced Seizure and (ii) Scuffing. An extensive set of parametric simulations covering load, speed, shaft radius, operating clearance, bearing length, friction coefficient and thermal expansion coefficient are performed to gain insight into the failure of oscillating pin-bushings. A statistical procedure is applied to the simulated results and an empirical relationship is derived.
Downloads
References
ANSYS Inc., ANSYS 5.7 Online Users Manual, 2001, ANSYS Inc.
Bishop J.L., McC. Ettles C.M., “The seizure of journal bearings by thermoelastic
mechanisms”, Wear, Vol. 79, 1982, pp. 37-52.
Dufrane K., Kannel J., “Thermally induced seizures of journal bearings”, ASME Journal of
Tribology, Vol. 111, 1989, pp. 288-292.
Dyson A., “Scuffing”, Treatise on Material Science and Technology, Vol. 13, 1979, pp. 175-
Hazlett T.L., Khonsari M.M., “Finite element model of journal bearing undergoing rapid
thermally induced seizure”, Tribology International, Vol. 25, No. 3, 1992a, pp. 177-182.
Hazlett T.L., Thermoelastic behavior of journal bearing undergoing seizure – a finite element
study, M.S. Thesis, University of Pittsburgh, Pittsburgh, Pennsylvania, 1990.
Krishnamurthy H., Application of Duhamel’s Theorem to Problems Involving Oscillating
Heat Source, M. S. Thesis, Department of Mech. Engr., Louisiana State University, 2002.
Krithivasan R., Khonsari M.M., “Thermally Induced Seizure in Journal Bearings during
Startup and Transient Flow Disturbance”, ASME Journal of Tribology, Vol. 125, 2003,
pp. 833-841.
Krithivasan R., Transient Thermomechanical Interactions of Shaft- Bushing Pair in Bearings
– A Finite Element Study, M.S. Thesis, Department of Mechanical Engineering,
Louisiana State University, 2002.
PDE Solutions Inc., FlexPDE: A Flexible Solution for Partial Differential Equations Version
20e 3D Online Reference Manuals, 1996-2001, PDE Solutions Inc.
Peterson M.B., Winer W.O., “Wear Control Handbook”, ASME, 1980, pp. 115.
Wang H., Axle Burn-off and Stack-up Force Analyses of a Railroad Roller Bearing using the
Finite Element Method, Ph.D. Thesis, Department of Mechanical and Industrial
Engineering, University of Illinois at Urbana-Champaign, 1996, 35, pp. 140-147.
Wang H., Conry T.F., Cusano C., “Effects of Cone/Axle Rubbing Due to Roller Bearing
Seizure on the Thermomechanical Behavior of a Railroad Axle”, ASME Journal of
Tribology, Vol. 118, 1996, pp. 311-319.
Wang Q., “Seizure Failure of journal-bearing conformal contacts”, Wear, Vol. 210, 1997,
pp. 8-16.
