rolling contact fatigue life and spall propagation of

Fatigue resistance and failure mechanisms of plasma

2010-10-14Rolling contact fatigue (RCF) can be dened as cracking and pitting/delamination limited to the near contact surface of bodies rolling against each other [1] For the bulk materials in rolling contact such as bearing steels the fatigue resistance and failure mechanisms have been addressed in numerous studies by using the experimental or theoretical approach [2–5]

A new damage

2019-11-28contact pressure on fatigue life are investigated 2 Rolling contact stress analysis 2 1 FE model A schematic diagram of the contact between the roller and outer ring is shown in Fig 1 In the figure R 1 and R 2 are the radii of the roller and outer ring respectively P denotes the load borne by the bearing per unit length

Spall Evolution in a Rolling Element Bearing

2020-6-61 Spall Evolution in a Rolling Element Bearing Dmitri Gazizulin1 Roni Schneck2 Renata Klein3 Jacob Bortman1 1PHM Lab Department of Mechanical Engineering Ben-Gurion University of the Negev P O Box 653 Beer Sheva 8410501 Israel dima gzizogmail jacbortbgu ac il 2Department of Materials Engineering Ben-Gurion University of the Negev P O Box 653 Beer

Bearing Steel Technologies: 11th Volume

2017-12-11Advances in Rolling Contact Modeling Functional Life Prediction and Rolling Contact Testing The Study of the Evaluation of the Fracture Initiation and Propagation on the Rolling Contact Fatigue in Bearing Steels 487 Akihiro Owaki Masaki Shimamoto Tomoko Sugimura and Katsuhiro Iwasaki tolerance to spall propagation higher

A method for rolling contact fatigue based on the asperity

2012-9-11Department of Solid Mechanics KTH Royal Institute of Technology Stockholm Sweden a r t i c l e i n f o a b s t r a c t The purpose was to develop a fracture mechanics based method for determining the life of surface initiated rolling contact fatigue or spalling

Fatigue Life Analysis of Rolling Bearings Based on

Rolling bearings are widely used in aeroengine machine tool spindles locomotive wheelset and so forth Rolling bearings are usually the weakest components that influence the remaining life of the whole machine In this paper a fatigue life prediction method is proposed based on quasistatic modeling of rolling bearings With consideration of radial centrifugal expansion and thermal

[45] ALLISON B PANDKAR A Critical factors for determining a first estimate of fatigue limit of bearing steels under rolling contact fatigue[J] International Journal of Fatigue 2018 117:396-406 [46] PIPPAN R TABERNIG B GACH E et al Non-propagation conditions for fatigue cracks and fatigue in the very high-cycle regime[J] Fatigue Fracture of Engineering Materials Structures 2002 25(8/9):805

Experimental analysis and modelling of c

2019-2-6Fatigue failure procedure can be divided in to two stages i e crack initiation and propagation Fig 1 shows an example of c-crack initiation and propagation during rolling contact bench testing Propagation of crack in a cracked body governs its fatigue life The cracks propagate under continuous rolling contact fatigue conditions until they

Modelling of Surface Initiated Rolling Contact Fatigue

2017-1-24The effects on initiation crack path and fatigue life were examined for a gear application The asperity point load model could predict effects on rolling contact fatigue that are observed with experiments The study of a ring/cone crack subjected to a rolling contact fatigue load allowed to explain the v-shaped cracks typical for

A Review of Rolling Contact Fatigue

2009-9-25dynamics rolling contact fatigue RCF etc This paper deals with the bearing rolling contact fatigue empirical and analytical models developed and proposed over the past few decades It has been proposed that if a ball or a rolling element bearing is prop-erly loaded lubricated installed and kept free of foreign contami-

Modelling of Surface Initiated Rolling Contact Fatigue

2017-1-24The effects on initiation crack path and fatigue life were examined for a gear application The asperity point load model could predict effects on rolling contact fatigue that are observed with experiments The study of a ring/cone crack subjected to a rolling contact fatigue load allowed to explain the v-shaped cracks typical for

Experimental evaluation of the fatigue life of hydraulic

Rolling contact components have a fatigue life (number of cycles to develop a noticeable fatigue spall) Nevertheless unlike structural fatigue contact fatigue has no endurance limit If one compares the fatigue lives of cyclic torsion with rolling contact the latter are seven orders of magnitude greater 21 Contact fatigue produces a

Rolling Contact Fatigue

S Marich in Wheel–Rail Interface Handbook 2009 27 4 Rail contact fatigue and thermal/traction defects The term rolling contact fatigue (RCF) is generic in nature and used to describe a range of defects which are due basically to the development of excessive cyclic shear stresses at or close to the wheel–rail contact interface causing plastic deformation and exceedance of the shear

A fracture mechanical life prediction method for

2012 (English) In: Engineering Fracture Mechanics ISSN 0013-7944 E-ISSN 1873-7315 Vol 83 p 62-74 Article in journal (Refereed) Published Abstract [en] The purpose was to develop a fracture mechanics based method for determining the life of surface initiated rolling contact fatigue or spalling

Rolling Contact Fatigue Life and Spall Propagation

2018-11-12Though there is substantial prior work published on the rolling contact fatigue initiation of these materials little is known about their spall propagation characteristics after spall initiation In Part III 208-size 40-mm-bore bearings are examined for changes in appearance of the microstructure as well as residual stress as a function of

Nagaraj K Arakere Primary

Professor Arakere received his Ph D in 1988 from Arizona State University His research interests include Damage mechanics of structural materials subjected to monotonic and fatigue loading Fatigue life evaluation Rolling contact fatigue Spall propagation Superalloys Foams Related constitutive and finite element model development and Dynamics of rotor-bearing systems

A new damage

2019-11-28contact pressure on fatigue life are investigated 2 Rolling contact stress analysis 2 1 FE model A schematic diagram of the contact between the roller and outer ring is shown in Fig 1 In the figure R 1 and R 2 are the radii of the roller and outer ring respectively P denotes the load borne by the bearing per unit length

The progression of surface rolling contact fatigue

2015-12-18Often rolling contact fatigue damage originated around surface microgeometry features develops into a spall Spall propagation in its advanced form is strongly influenced by macrogeometry aspects – for example the evolution of the raceway contact geometry and resulting overall stress field in a rolling bearing

Spall Propagation Characteristics of Refurbished

However bearing operation after fatigue spall initiation on refurbished bearings has not been extensively studied In this study spall propagation characteristics were compared between new and refurbished vacuum induction-melted vacuum arc remelted AISI M50 208-size angular contact bearings

TRACKING OF SPALL DETERIORATION ON TAPERED

2020-3-9The effects of slipping and sliding of rolling components on contact surfaces is further discussed in [10] There have been a few attempts by researchers to correlate bearing life to contact fatigue and subsurface [11 inclusions 12] Some have even attempted to increase the longevity of bearing life by utilizing a method involving Hot Isostatic

THE TORRINGTON COMPANY BEARING FAILURE

2017-7-18A bearing has a life expectancy which depends upon load and speed imposed on the bearing Calculations based upon laboratory testing and field experience have been established to determine as accu-rately as possible the life span of a group of bearings of a given size Fatigue failure is the result of a bearing living out its normal life span

A Study on Contact Fatigue Mechanisms

2005-3-17fatigue A mechanism for rolling contact fatigue based on tensile stresses from axi-symmetric asperity contacts is reviewed and supported by the experimental findings The results have also led to the understanding that there are two different mechanisms responsible for initiation of surface and sub-surface contact fatigue First however the

A New Fatigue Life Model for Rolling Bearings

A New Fatigue Life Model for Rolling Bearings This paper describes a novel model for the prediction of fatigue life in rolling bearings Central to this model is the postulation of a statistical relationship be tween the probability of survival the fatigue life and a stress-related fatigue

Rolling Contact Fatigue

2002-7-16Rolling Contact Fatigue R Ahmed Heriot-Watt University (United Kingdom) Fig 1 Typical morphology of fatigue spall in rolling-element bearings (a) Fatigue spall centered on a ball bearing raceway (b) Fatigue spall on 12 7 mm(0 5in ) diameter steel ball obtainedusingrollingfour-ballmachine A MAJOR CAUSE of failure in components

Investigation of the Relation between Rolling Contact

Through the rolling contact fatigue experiment under the condition of the lubricating oil this article investigated the relation between contact fatigue property and microstructure on the surface layer of D2 wheel steel The results showed that although the roughness of the original specimen induced by mechanical processing would diminish to some extent in the experiment the 0 5 - 1 5 μm

Rolling Contact Fatigue Evaluation of Advanced

The effect of the oil anti-wear additive tricresyl phosphate (TCP) on rolling contact fatigue (RCF) life of advanced bearing steels—AISI VIMVAR M50 CSS 42L Pyrowear 675 and Cronidur 30 was investigated with silicon nitride balls at 177 C and at a maximum Hertzian stress of 5 5 GPa TCP at 1% additive concentration was blended into a synthetic polyol ester turbine engine lubricant

The Progression of Surface Rolling Contact Fatigue

Often rolling contact fatigue damage originated around surface micro geometry features develops into a spall Spall propagation in its advanced form is strongly influenced by macro geometry aspects – for example the evolution of the raceway contact geometry and resulting overall stress field in a rolling