Modeling of Surface Modified Layers in the Presence of Surface Irregularities
Author:
Gupta Vikas1, Hahn George T.2, Bastias Pedro2, Rubin Carol A.2
Affiliation:
1. EASi Engineering, Bingham Farms, MI 48034 2. Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37235
Abstract
Finite element calculations that examine the effects of surface modification on the deformation produced by pure rolling contact are presented. The model simulates the repeated, two-dimensional (line) contact of a cylinder that is rolling over a semi-infinite half space. The half space is treated as an elastic-linear-kinematic-hardening-plastic (ELKP) material with the cyclic flow properties of a hardened, HRC-62, bearing steel. Two different cases are examined: (i) a smooth half space is studied using a one-body model, and (ii) a half space with a 100 μm wide and 7 μm deep surface asperity is studied using a two-body model. In both cases, calculations are performed for a homogeneous body and a body with a shallow, surface modified layer. The surface modified layer is alternately: (a) stiffer, (b) harder, (c) softer, and (d) harder and stiffer as compared to the substrate. Consistent with the earlier studies of surface modification (Bhargava, 1987), the present findings indicate that the benefits of the mechanical property modifications are confined to the altered layer itself. This may explain the improvement in performance realized by relatively thin modified layers (≈5 μm).
Publisher
ASME International
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials
Reference14 articles.
1. Bastias
P. C.
, HahnG. T., GuptaV., RubinC. A., and LengX., 1994, “Analysis of Rolling Contact Spall Life in 440C Bearing Steel,” Wear, Vol. 171, pp. 169–178. 2. Bhargava
V.
, HahnG. T., and RubinC. A., 1987, “An Elastic-Plastic Analysis of Hardened Layers in Rims Subjected to Rolling Contacts,” Met. Trans. A, Vol. 18A, pp. 827–833. 3. Braza, J. P., 1991, “Rolling Contact Fatigue and Sliding Wear Performance of Ferritic Nitrocarburized M-50 Steel,” STLE Preprint 91-AM-2D-2. 4. Eberhardt, A. W., and Keer, L. H., 1991, “Normal and Tangential Contact of Thin Layered Spheres,” Advances in Engineering Tribology, STLE, Y. Chung and H. Cheng (eds.), pp. 110–121. 5. Gupta
v.
, BastiasP. C., HahnG. T., and RubinC. A., 1995, “Contribution of Surface Indents to Rolling Contact Plasticity,” ASME JOURNAL OF TRIBOLOGY, Vol. 117, No. 4, pp. 660–666.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|