... the increase in the capacity to withstand surface pressure by comparing present results with rolling contact fatigue lifetimes obtained during tests on several open gears submitted to different mission profiles. This study made it possible to reproduce how and under what conditions the work hardening during...

...Steven J. Lorenz; Farshid Sadeghi; Hitesh K. Trivedi; Mathew S. Kirsch; Chinpei Wang This paper presents a finite element model (FEM) to investigate the effect of prior austenite grain refinement on rolling contact fatigue (RCF). RCF life was determined using continuum damage mechanics (CDM), which...

...Panahsadat Fasihi; Ralph Abrahams; Peter Mutton; Wenyi Yan To overcome the previous limitations imposed by standard laser cladding alloys, a novel iron-based laser cladding alloy, SS415, is developed and investigated. The wear and rolling contact fatigue resistance properties of the novel SS415...

... layer. Cracks with large angles mainly propagated along the boundary at the front edge, while at the rear edge, the crack morphology was closely related to the hardness of clad layer. 434L would induce the minimum wear loss and the modest rolling contact fatigue (RCF) of the repaired rail disc, which...

... Thermal Elastohydro Dynamic Contacts ,” Tribol. Int. , 46 ( 1 ), pp. 3 – 13 . 10.1016/j.triboint.2011.04.013 [44] Paulson , N. R. , Sadeghi , F. , and Habchi , W. , 2017 , “ A Coupled Finite Element EHL and Continuum Damage Mechanics Model for Rolling Contact Fatigue ,” Tribol...

... case-hardened materials. The results are applied to examine the rolling contact behaviors of several case-hardened steels, and the data correlation suggests that their rolling contact fatigue lives are related to a nondimensional case-hardening slope besides external loading. Contributed...

... conditions. The main part includes the basics of wheel-rail wear, experimental methodology, wear and rolling contact fatigue (RCF), and some measures to counter these degradation mechanisms. wheel-rail wear environmental conditions rolling contact fatigue open system contact contact mechanics rolling...

...Deepak K. Prajapati; Mayank Tiwari Rolling contact fatigue (RCF) is one of the major problems observed in gear mechanisms, which leads to high friction, ultimately resulting in high energy consumption. This paper demonstrates the evolution of surface topography during running-in and subsequent RCF...

...Zamzam Golmohammadi; Farshid Sadeghi A coupled multibody elastic–plastic finite element (FE) model was developed to investigate the effects of surface defects, such as dents on rolling contact fatigue (RCF). The coupled Voronoi FE model was used to determine the contact pressure acting over...

... was proposed based on simulation results, linking the bearing life reduction factor (LRF) to the accumulative inclusion length within the stressed volume under contact load. bearing fatigue life rolling contact fatigue steel cleanliness inclusions Steel cleanliness has a major influence...

... very much. The pressure increase depends markedly on the overall film thickness before the stopping of the motion, but is hardly controlled by the acceleration after the stopping. It can be considered that this phenomenon affects the rolling contact fatigue damage. elastohydrodynamic lubrication...

... and the results were compared to those generated assuming a Hertzian pressure profile. The spall shape, fatigue lives, and their dispersion characterized by Weibull slopes obtained from the model correlate well with the previously published experimental results. rolling contact fatigue finite element...

...Gao Xue Hai; Huang Xiao Diao; Hong Rong Jing; Wang Hua; Chen Jie Rolling contact fatigue (RCF) corresponds to the formation of the first spall, which is a stochastic behavior; therefore, the RCF life should be reliably calculated. A method for evaluating RCF reliability was developed based...

...Nick Weinzapfel; Farshid Sadeghi; Vasilios Bakolas; Alexander Liebel Rolling contact fatigue of rolling element bearings is a statistical phenomenon that is strongly affected by the heterogeneous nature of the material microstructure. Heterogeneity in the microstructure is accompanied by randomly...

...Arthur Francisco; Houssein Abbouchi; Bernard Villechaise The background of the present study is the rolling contact fatigue (RCF) in a brittle polymer disk. The disk has been tested on a two disk machine, under controlled normal and tangential loads, with no global slip. After several million...

.... , 2009 , “ A Review of Rolling Contact Fatigue ,” ASME J. Tribol. 0742-4787 , 131 , p. 041403 . 10.1115/1.3209132 Österlund , R. , and Vingsbo , O. , 1980 , “ Phase Changes in Fatigued Ball Bearings ,” Metall. Trans. A 0360-2133 , 11A , pp. 701 – 707 . Voskamp , A. P...

...Arthur Francisco; Houssein Abbouchi; Bernard Villechaise Despite the numerous experimental works on rolling contact fatigue, dealing with two-disk contacts, some phenomena still remain badly understood. Most of the test benches, used for that purpose, impose the rotational speeds to the disks...

...Behrooz Jalalahmadi; Farshid Sadeghi It has been widely accepted that the microstructure of bearing materials can significantly affect their rolling contact fatigue (RCF) lives. Hence, microlevel topological features of materials will be of significant importance to RCF investigation. In order...

... originated spalling has been recognized as one of the main modes of failure for rolling contact fatigue (RCF) of bearings. In the past few decades a significant number of investigators have attempted to determine the physical mechanisms involved in rolling contact fatigue of bearings and proposed models...

...Behrooz Jalalahmadi; Farshid Sadeghi Microlevel material failure has been recognized as one of the main modes of failure for rolling contact fatigue (RCF) of bearing. Therefore, microlevel features of materials will be of significant importance to RCF investigation. At the microlevel, materials...