Affiliation:
1. Technical University “Gheorghe Asachi”
Abstract
The author presents an accurate method to calculate the residual fields in case of non-hertzian elastic-plastic contact problems in roller bearings. This kind of analysis requires a complete three-dimensional investigation due to the finite length of the contacting bodies. Previous analyses carried out in two-dimensional case are not able to take into account the complexity of the problem and the so-called edge-effect that is known to reduce the bearing fatigue life. A semi-analytical code previously developed was adapted to account for three-dimensional line contact analysis. A non-linear rate independent isotropic and kinematic hardening model is implemented for the bearing steel plastic behavior. Closed form solutions for residual stresses during cyclic non-proportional loading are obtained from the plastic strains and they are considered as initial stresses at every loading cycle.
Publisher
Trans Tech Publications, Ltd.
Reference14 articles.
1. J. E. Merwin, K. L. Johnson, An analysis of plastic deformation in rolling contact, Proc. Inst. Mech. Eng., London, 177 (1963) 676-685.
2. A. D. Hearle, K. L. Johnson, Cumulative plastic flow in rolling and sliding line contact, ASME Journal of Applied Mechanics, 54 (1987) 1-7.
3. A. F. Bower, K. L. Johnson, The influence of strain hardening on cumulative plastic deformation in rolling and sliding line contact, Journal of Mechanics and Physics of Solids, 37: 4 (1989) 471-493.
4. V. Bhargava et al., An elastic-plastic finite element model of rolling contact. Part I: Single contacts, Part II: Repeated contacts, ASME Journal of Applied Mechanics, 52 (1983) 66-82.
5. D. L. McDowell, G. J. Moyar, A more realistic model of nonlinear material response: application to elastic-plastic rolling contact, Proc. 2nd Int. Symposium on Contact Mechanics and Wear of Rail/Wheel System, Kingston, Rhode Island, 8-11 July, (1986).