rolling contact fatigue life and spall propagation

Progress in Materials Science

2015-10-6a fatigue crack length or half-length for surface breaking cracks a 1 reliability constant in bearing life equation a 2 material fatigue properties constant in bearing life equation a 3 lubricant constant in bearing life equation a 4 processing parameter in bearing life equation a 5 a 6 a 7 empirical constants in fatigue life model a 8 a

[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

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 Review of Rolling Contact Fatigue

Subsurface 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 to predict their fatigue lives

CONTACT ANALYSIS OF AIRCRAFT ENGINE BEARING

2019-7-14impact and contact stress at the spall trailing edge resulted in material degradation resulting in the propagation of the trailing edge in the circumferential direction Peng Qin and Xiaoling Zhang [10] had done the life analysis for the main bearing of aircraft engines

Research Article Fatigue Life Analysis of Rolling Bearings

2019-7-31e rolling bearing failure is typical rolling contact fatigue [ ] Because fatigue spall of material originating from subsurface caused by rolling contact is the main failure form of rolling bearing [ ] researchers put forward a lot of rolling contact fatigue models to predict rolling bearing life in past decades e deterministic research models

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

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

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

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

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 Failure Progression Michael N Kotzalas1 in Ball

A spall progression life mathematical model for balls endurance tested in the v-ring rig was created by extending the Ioannides–Harris fatigue life theory Also excessive vibratory loading was determined to be the major cause of total component failure DOI: 10 1115/1 1308013# Introduction Spall Initiation Operation of a rolling bearing

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

A Review of Rolling Contact Fatigue

Subsurface 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 to predict their fatigue lives

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

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

The progression of surface rolling contact fatigue

2015-12-18Rolling contact fatigue (RCF) is a typical failure mode in rolling bearings and similar types of machine components The fundamental work in RCF is due to Lundberg and Palmgren [1] [2] The Lundberg-Palmgren theory was mainly focused on subsurface rolling contact fatigue and it relies entirely on ideally smooth Hertzian stress calculations

Spall Propagation

2020-8-2In this Phase I SBIR project UES proposes to identify the key properties of Pyrowear 675 such as microstructure and near-surface fracture toughness that control the spall propagation rate For this purpose Rolling Contact Fatigue tests will be conducted under selected stress cycles and the neighborhood of spalled area will be investigated

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

Contact Yield Initiation and Its Influence on Rolling

Stress distributions and plastic deformation zones are factors directly influencing the fatigue life of components under cyclic contact An effective approach to improving the resistance of a steel to contact fatigue failure is surface hardening which builds gradient yield strength from the

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

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

Lifetime prediction for the subsurface crack propagation

2019-11-9investigated the rolling contact fatigue initiation and spall propagation characteristics of different bearing materials Elastic and elastic-plastic subsurface stress fields are computed using finite element models that incorporates the full three-dimensional ball-raceway geometry The results