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Articles de revues sur le sujet « Fatigue de Contact Roulant »

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Publié le 5 avril 2025

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1

Koltsov, Alexey, Daniel Boulanger, Zoubir Ayadi, Michel Nivoit, Jean-Paul Bettembourg et André Galtier. « Modélisation de la fissuration en contact roulant ». Mécanique & ; Industries 6, no 5 (septembre 2005) : 509–19. http://dx.doi.org/10.1051/meca:2005063.

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Alfredsson, B., et M. Olsson. « Standing contact fatigue ». Fatigue & ; Fracture of Engineering Materials & ; Structures 22, no 3 (mars 1999) : 225–37. http://dx.doi.org/10.1046/j.1460-2695.1999.00154.x.

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3

Keer, Leon M. « Mechanics of Contact Fatigue ». Applied Mechanics Reviews 47, no 6S (1 juin 1994) : S194—S198. http://dx.doi.org/10.1115/1.3124405.

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Contact fatigue between typical machine elements such as gears, roller followers, bearings and other components involves many complex interacting features. There are the effects of geometry, mechanical properties, material properties and surface chemistry. The present discussion will center around analytical prediction techniques that are concerned only with the mechanical aspects of contact fatigue between two elements. Aspects related to the initiation of a crack under repeated loading will be discussed. The application of an approach developed by Mura, analogous to Griffith’s criterion for fracture, will be used to show how estimates of initiation life can be made and how these estimates are related to currently used ones. Once a crack has been initiated, then issues related to crack propagation become important. Some fracture mechanics based methods developed to calculate crack growth will be described along with estimates of crack propagation life.
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Bhowmick, Sanjit, Juan José Meléndez-Martínez et Brian R. Lawn. « Contact fatigue of silicon ». Journal of Materials Research 23, no 4 (avril 2008) : 1175–84. http://dx.doi.org/10.1557/jmr.2008.0149.

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Macroscopic cracks in bulk silicon are generally considered to be immune to fatigue. Here, evidence for pronounced fracture-related fatigue damage in cyclic contact loading of (001) monocrystalline silicon with hard spheres of millimeter-scale radius is presented. The periodic indentation field generates ring cracks around the contact, which proliferate with continued cycling. Copious debris in the form of slabs and particulates is ejected from within the crack walls onto the specimen surface. Continued ejection leads ultimately to large-scale surface removal. The fatigue damage progressively degrades the material strength, more rapidly at higher contact load. Implications concerning the function of silicon devices, including microelectro-mechanical systems, will be briefly discussed.
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ALFREDSSON, B., et M. OLSSON. « Inclined standing contact fatigue ». Fatigue Fracture of Engineering Materials and Structures 26, no 7 (juillet 2003) : 589–602. http://dx.doi.org/10.1046/j.1460-2695.2003.00628.x.

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Kim, Tae Wan, Sang Don Lee et Yong Joo Cho. « Contact Fatigue Life Prediction under EHL Contact ». Key Engineering Materials 297-300 (novembre 2005) : 22–27. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.22.

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In this study, the simulation of contact fatigue based on stress analysis is conducted under Elastohydrodynamic Lubrication (EHL) state. To predict a crack initiation life accurately, it is necessary to calculate contact stress and subsurface stresses accurately. Contact stresses are obtained by contact analysis of a semi-infinite solid based on the use of influence functions and the subsurface stress is obtained using rectangular patch solutions. The numerical algorithm using newton-rapson method was constructed to calculate the EHL pressure. Based on these stress values, three multiaxial high-cycle fatigue criteria are used. As a result, the effects of EHL on contact fatigue life are calculated.
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Seo, Jung Won, Seok Jin Kwon, Hyun Mu Hur, Jae Boong Choi et Young Jin Kim. « The Contact Fatigue Life Evaluation According to Contact Surface Removal ». Key Engineering Materials 321-323 (octobre 2006) : 640–43. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.640.

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Railway wheels and axles have been one of the most critical components in a railway vehicle. The service conditions of railway vehicles have became more severe in recent years due to the increase of the speed. It is very important to evaluate the reliability of wheels with regard to safety, because wheel failure can cause derailment with loss of life and property. One of the major reasons of the railway wheel damage is the contact zone failure by wheel/rail contact. One of the methods for preventing the failure and increasing the fatigue life is to grind periodically the contact surface before reaching the failure. The increase or decrease of the contact fatigue life by the surface removal of the contact surface were shown by many researchers. However, the reason why fatigue life increases or decrease has not been investigated obviously. In this study, the effect of the surface removal depth on the contact fatigue life for a railway wheel is evaluated through the employment of rolling contact fatigue tests and the finite element analysis. It is found that the contact fatigue life increased with the removal depth. But in the case that the removal depth is greater than the optimal depth, the contact fatigue life decreased. It seems to be obvious that the residual strain is the main factor determining the fatigue life according to the removal depth
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8

Alfredsson, B. « Applying multiaxial fatigue criteria to standing contact fatigue ». International Journal of Fatigue 23, no 6 (juillet 2001) : 533–48. http://dx.doi.org/10.1016/s0142-1123(01)00008-1.

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De Pauw, J., P. De Baets, W. De Waele et R. Hojjati. « Contact mechanics in fretting fatigue ». International Journal Sustainable Construction & ; Design 3, no 3 (6 novembre 2012) : 199–206. http://dx.doi.org/10.21825/scad.v3i3.20575.

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This paper studies the contact mechanics in a line contact during fretting fatigue conditions. Inliterature one can find numerical and analytical solutions of normal and tangential stresses for a variety ofloading cases. However, a unified solution valid for all loading cases during fretting fatigue conditions is notavailable. We present in this paper a strategy to combine existing contact mechanics theories into a unifiedcalculation procedure. Therefore, the relevant contact mechanics theories for an idealized cylinder-on-flatcontact are selected and bundled. Two clear flowcharts group the existing theories, which results in aunified strategy that can easily be implemented in a programming language. A Matlab script wasprogrammed and calculates the normal and tangential stress distribution based on the applied forces, thegeometry of the contact, the coefficient of friction and the material properties. The present theory can beused to automate the calculation of the stress distributions, or as validation of new numerical techniques.The script is modular and can be extended to calculate the lifetime of a component, by adding lifetimecriteria.
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10

Lee, Seung Kun, et Brian R. Lawn. « Contact Fatigue in Silicon Nitride ». Journal of the American Ceramic Society 82, no 5 (21 décembre 2004) : 1281–88. http://dx.doi.org/10.1111/j.1151-2916.1999.tb01908.x.

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Eyzop, B. Legin, et S. Karlsson. « Contact fatigue of silicon nitride ». Wear 249, no 3-4 (mai 2001) : 208–13. http://dx.doi.org/10.1016/s0043-1648(01)00563-4.

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Sosnovskii, L. A., V. A. Zhmailik et V. V. Komissarov. « Size effect in contact fatigue ». Strength of Materials 41, no 1 (janvier 2009) : 88–94. http://dx.doi.org/10.1007/s11223-009-9103-x.

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Ringsberg, J. « Prediction of fatigue crack initiation for rolling contact fatigue ». International Journal of Fatigue 22, no 3 (mars 2000) : 205–15. http://dx.doi.org/10.1016/s0142-1123(99)00125-5.

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Cavallaro, G. P., T. P. Wilks, C. Subramanian, K. N. Strafford, P. French et J. E. Allison. « Bending fatigue and contact fatigue characteristics of carburized gears ». Surface and Coatings Technology 71, no 2 (mars 1995) : 182–92. http://dx.doi.org/10.1016/0257-8972(94)01019-f.

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15

Cao, Wei, Si Ren, Wei Pu et Ke Xiao. « Microstress cycle and contact fatigue of spiral bevel gears by rolling-sliding of asperity contact ». Friction 8, no 6 (4 janvier 2020) : 1083–101. http://dx.doi.org/10.1007/s40544-019-0335-x.

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AbstractThe rolling contact fatigue (RCF) model is commonly used to predict the contact fatigue life when the sliding is insignificant in contact surfaces. However, many studies reveal that the sliding, compared to the rolling state, can lead to a considerable reduction of the fatigue life and an excessive increase of the pitting area, which result from the microscopic stress cycle growth caused by the sliding of the asperity contact. This suggests that fatigue life in the rolling-sliding condition can be overestimated based only on the RCF model. The rubbing surfaces of spiral bevel gears are subject to typical rolling-sliding motion. This paper aims to study the mechanism of the micro stress cycle along the meshing path and provide a reasonable method for predicting the fatigue life in spiral bevel gears. The microscopic stress cycle equation is derived with the consideration of gear meshing parameters. The combination of the RCF model and asperity stress cycle is developed to calculate the fatigue life in spiral bevel gears. We find that the contact fatigue life decreases significantly compared with that obtained from the RCF model. There is strong evidence that the microscopic stress cycle is remarkably increased by the rolling-sliding motion of the asperity contact, which is consistent with the experimental data in previous literature. In addition, the fatigue life under different assembling misalignments are investigated and the results demonstrate the important role of misalignments on fatigue life.
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16

Lee, Dong Hyung, Seok Jin Kwon, Jung Won Seo et Won Hee You. « Effects of Hub Contact Shape on Contact Pressure and Fatigue Life in a Press-Fitted Shaft ». Materials Science Forum 654-656 (juin 2010) : 1638–41. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.1638.

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The objective of this study is to clarify the effect of hub contact shape on contact pressure and fatigue life with regard to the selection of a suitable taper design near the end of the fit. A numerical asymmetric-axisymmetric finite element model was developed in order to determine the contact stress state of press-fitted shaft by using four types of tapered contact surfaces on the hub. The variations of fatigue crack initiation life according to the change of tapered contact surfaces on the hub were evaluated by using the Smith-Watson-Topper (SWT) multiaxial fatigue criterion. As the result, comparing with the contact pressure and the fatigue crack initiation life, maximum decrease of contact pressure and maximum increase of fatigue crack initiation life were obtained for the 1/400 m/m tapered hub subjected to a bending load near the fretting fatigue limit. Furthermore, as the change of bending load, the optimal amout of taper in hub which fatigue life gets into maximum is varied. Therefore, we suggest that the best performance, in terms of pressure distribution and fatigue life of press fit, can be obtained by using a proper taper values for the hub element.
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17

ABBASI, F., et G. H. MAJZOOBI. « EFFECT OF CONTACT PRESSURE ON FRETTING FATIGUE BEHAVIOR UNDER CYCLIC CONTACT LOADING ». Surface Review and Letters 24, Supp02 (novembre 2017) : 1850032. http://dx.doi.org/10.1142/s0218625x18500324.

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In this study, the effect of contact pressure on fretting fatigue behavior of Al7075-T6 under cyclic normal contact loading is investigated. It is found that fretting fatigue life for the case of cyclic contact load was significantly less than that for constant contact load at the same axial and contact load levels, particularly for High Cycle Fatigue (HCF) conditions. The results showed that the fretting fatigue life decreased monotonically with the increase in normal contact load for all axial stresses. Examination of the fretting scars was performed using optical microscopy and numerical simulation was carried out using commercial finite element (FE) codes ABAQUS[Formula: see text] and FRANC2D/L[Formula: see text] to calculate the crack propagation life. The crack initiation life was calculated by a combination of numerical and experimental results. Finally, the FE simulation was validated by a comparison between the numerical crack growth rate and the experimental measurement using replica.
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18

Takeda, Junji, Mitsuo Niinomi et Toshikazu Akahori. « Effects of Contact Pressure on Fretting Fatigue Characteristics of Ti-4.5Al-3V-2Mo-2Fe with Acicular Alpha Structure ». Materials Science Forum 475-479 (janvier 2005) : 585–88. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.585.

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The effects of microstructure and contact pressure on fretting fatigue characteristics of Ti-4.5Al-3V-2Mo-2Fe conducted with annealing at 1123 K and 1223 K were investigated in this study. Fretting fatigue tests in low and high cycle fatigue life regions of the alloys with equiaxed α and acicular α structures were carried out at each contact pressure of 10, 15, 30, 45, 75, 105 and 153 MPa. In the alloy with equiaxed α structure, fretting fatigue strength tends to be very low at contact pressures of 10 MPa and 15 MPa in low and high cycle fatigue life regions, respectively. Furthermore, fretting fatigue strength tends to be nearly constant at the contact pressure over 45 MPa in each fatigue life region. On the other hand, in the alloy with acicular α structure, fretting fatigue strength tends to be very low at contact pressures of 15 MPa and 30 MPa in low and high cycle fatigue life regions, respectively. Furthermore, fretting fatigue strength tends to be nearly constant at contact pressures of 45 MPa and over 30 MPa in low and high fatigue life regions, respectively.
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19

Chen, Hui Juan, Yi Hong Liu, Yong Wang, Yan Qiu et Yi Wang Bao. « Cyclic Contact Fatigue of Dental Porcelain ». Key Engineering Materials 544 (mars 2013) : 326–29. http://dx.doi.org/10.4028/www.scientific.net/kem.544.326.

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The residual strength of dental porcelain discs were test after cycling fatigue compressive load in this study. Moreover, the effects of stress intensity and cycle frequency to the damage of porcelain were explored. The porcelain specimens were bonded to the epoxy resin blocks, with 12.5mm height. The cycling fatigue contact loads were subjected on the porcelain surfaces of the bi-layer composites with silicon nitride spheres of radius 2.5mm. The crosshead speed was 6mm/min. The top load value was varied from 10N-20N in every load cycles. The cycling number was from 50-300. After cycling test, the residual strength of all porcelain samples was measured by bi-axial bending test. Fractured pieces of the specimens were collected and examined with optical microscope and SEM. On the fracture surfaces of porcelain discs after bi-axial bending test, Hertz cone cracks were presented due to cycling fatigue load. The result showed that the residual strength of dental porcelain had negative correlation with the fatigue load values and cycles. When the fatigue load cycles were lower than 100, the residual strength of porcelain presented no significant different under 10 or 20N fatigue load. In contrary, when the fatigue load cycles were over 100, the residual strength of porcelain was much lower under 20N fatigue load than 10N fatigue load. Based on the limited results of this study, the conclusion could be drawn that the residual strength of porcelain under fatigue compressive stress was main determined by load cycles in the range of small load values. The porcelain could be destroyed after very few cycles if the load is up to a critical value.
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Maslan, M. H., M. A. Sheikh et S. Arun. « Prediction of Fatigue Crack Initiation in Complete Contact Fretting Fatigue ». Applied Mechanics and Materials 467 (décembre 2013) : 431–37. http://dx.doi.org/10.4028/www.scientific.net/amm.467.431.

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Fretting induced cracking is commonly observed in industrial components that are in contact and are subjected to small oscillatory movements between them. Fretting causes a considerable reduction in fatigue strength. In this paper, finite element modeling is used in conjunction with Smith Watson Topper (SWT) criterion to estimate crack initiation in fretting. The predictions from the analysis are compared with the experimental results. It is concluded that the analysis must include the effect of residual stress and wear profile with debris effect for better predictions.
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Morris, Dallin, Farshid Sadeghi, Yong-Ching Chen, Chinpei Wang et Ben Wang. « Predicting Material Performance in Rolling Contact Fatigue via Torsional Fatigue ». Tribology Transactions 62, no 4 (6 mai 2019) : 614–25. http://dx.doi.org/10.1080/10402004.2019.1587557.

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Baragetti, Sergio, et Federico Tordini. « Fatigue and Contact Fatigue Resistance of Thin Hard-Coated Components ». Key Engineering Materials 417-418 (octobre 2009) : 801–4. http://dx.doi.org/10.4028/www.scientific.net/kem.417-418.801.

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In this paper a review of the state of the art on the study of the fatigue and the contact/rolling contact fatigue (RCF) resistance of thin hard-coated components is provided. Physical and chemical vapor deposition (PVD and CVD) methods are used to deposit such films. A fair number of references reports experimental data highlighting the improvements achieved with coating deposition on both steels and light alloys. Numerical modelling has also been devoted to shedding light on the behaviour of coated components and reliable previsional procedures have been arranged to foresee the number of cycles until fatigue damage initiation and failure.
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CIAVARELLA, M., F. MONNO et G. DEMELIO. « On the Dang Van fatigue limit in rolling contact fatigue ». International Journal of Fatigue 28, no 8 (août 2006) : 852–63. http://dx.doi.org/10.1016/j.ijfatigue.2005.11.002.

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McCabe, J. F., Y. Wang et MJA Braem. « Surface contact fatigue and flexural fatigue of dental restorative materials ». Journal of Biomedical Materials Research 50, no 3 (5 juin 2000) : 375–80. http://dx.doi.org/10.1002/(sici)1097-4636(20000605)50:3<375 ::aid-jbm11>3.0.co;2-r.

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Reis, L., B. Li et M. de Freitas. « A multiaxial fatigue approach to Rolling Contact Fatigue in railways ». International Journal of Fatigue 67 (octobre 2014) : 191–202. http://dx.doi.org/10.1016/j.ijfatigue.2014.02.001.

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26

Zhou, Guo Cai, Zhi Xun Wen, Zhu Feng Yue et Yu Fen Gao. « The Influence of Friction Coefficient on Tenon/Groove Contact Performance in Nickel-Based Turbine Blade-Disc ». Advanced Materials Research 940 (juin 2014) : 74–80. http://dx.doi.org/10.4028/www.scientific.net/amr.940.74.

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This paper presented the influence of crystallographic orientation and friction coefficient on the contact stress and fatigue life in the tenon/groove contact region. A rate-dependent crystallographic plastic slip theory was used to calculate the contact stress and fatigue life in [001], [011] and [111] orientations. In the calculation, complex loading conditions and different friction coefficients of 0, 0.2, 0.4, 0.6, 0.8 and 1.0 were taken into account in tenon/groove. Then the relationship between contact stress, fatigue life and friction coefficient was discussed. Simulation results show that: friction coefficient and crystallographic orientation have significant effect on contact stress and fatigue life. Contact stress in [001], [011] and [111] orientation increases with increasing friction coefficient generally. For [001] and [011] orientation, the fatigue life decreases with increasing friction coefficient firstly. When friction coefficient is 0.4, the fatigue life meets its minimum. Then the fatigue life will increase with increasing friction coefficient. For [111] orientation, the change of fatigue life has no obvious trend, and while friction coefficient exceeds 0.6, the life almost constant.
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Vouaillat, Guillaume, Jean-Philippe Noyel, Fabrice Ville, Xavier Kleber et Sylvain Rathery. « From Hertzian contact to spur gears : analyses of stresses and rolling contact fatigue ». Mechanics & ; Industry 20, no 6 (2019) : 626. http://dx.doi.org/10.1051/meca/2019064.

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The study of rolling contact fatigue in spur gears requires a good comprehension of all the phenomena occurring at the material scale. On a numerical point of view, a realistic representation of the material and of the load repartition function of the local micro-geometries is needed. However the resulting models are often complex and time-consuming. So, this work aims at developing a model meeting these specificities. Thus, different sections of the spur gear material granular geometry are simulated first. Secondly, the contact pressure fields are computed accurately relatively to the simulated surface microgeometry. Then, the influence of several parameters on their rolling contact fatigue life is highlighted. Among friction, sliding coefficient, load variation and roughness, these individual or combined parameters are taken into account in the model, tested and their impact stressed out. Finally, a fatigue criteria based on rolling contact fatigue micro-cracks nucleation at grain boundaries is proposed in order to compare simulations and influencing parameters to the reference.
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Nam, Hyoung-Chul, Chang-Hyun Kim et Soon-Man Kwon. « Contact Fatigue Life for CRG System ». Transactions of the Korean Society of Mechanical Engineers A 36, no 11 (1 novembre 2012) : 1391–97. http://dx.doi.org/10.3795/ksme-a.2012.36.11.1391.

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Nam, Hyoung-Chul, Chang-Hyun Kim et Soon-Man Kwon. « Contact Fatigue Life for RRG System ». Journal of manufacturing engineering & ; technology 21, no 1 (15 février 2012) : 95–101. http://dx.doi.org/10.7735/ksmte.2012.21.1.095.

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Asada, S., Koji Hashimoto, Yutaka S. Sato, Kenji Fukuda et M. Ueki. « Rolling Contact Fatigue of Engineering Ceramics ». Solid State Phenomena 25-26 (janvier 1992) : 627–34. http://dx.doi.org/10.4028/www.scientific.net/ssp.25-26.627.

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Ceseracciu, Luca, Francis Chalvet, Emilio Jiménez-Piqué, Marc Anglada et Goffredo de Portu. « Contact Fatigue in Ceramic Laminated Composites ». Key Engineering Materials 290 (juillet 2005) : 222–29. http://dx.doi.org/10.4028/www.scientific.net/kem.290.222.

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In this work, the study of the contact fatigue of an alumina-based laminated composite with compressive residual stress in the surface is presented, together with monolithic alumina as a reference material. Hertzian indentation techniques were employed, which better represent the inservice actual contact loading. Different tests were performed under static and cyclic loading. The evolution of damage and the different types of fracture produced were examined, and an improvement in contact resistance of the composite, due to compressive residual stress, was highlighted. A better resistance of the laminated composite was observed for every test in comparison with the monolithic reference material.
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KARUPPANAN, S., D. DINI et D. A. HILLS. « Fretting fatigue test analysis of contact ». Fatigue & ; Fracture of Engineering Materials and Structures 30, no 6 (juin 2007) : 499–509. http://dx.doi.org/10.1111/j.1460-2695.2007.01118.x.

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Fahlkrans, Johan, Arne Melander, Krister Johansson, Sven Haglund et Seyed B. Hosseini. « Influence of tempering on contact fatigue ». International Journal of Microstructure and Materials Properties 6, no 6 (2011) : 465. http://dx.doi.org/10.1504/ijmmp.2011.044365.

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Fett, T., R. Keller, D. Munz, E. Ernst et G. Thun. « Fatigue of alumina under contact loading ». Engineering Fracture Mechanics 70, no 9 (juin 2003) : 1143–52. http://dx.doi.org/10.1016/s0013-7944(02)00094-2.

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Fernandes, P. J. L., et C. McDuling. « Surface contact fatigue failures in gears ». Engineering Failure Analysis 4, no 2 (juin 1997) : 99–107. http://dx.doi.org/10.1016/s1350-6307(97)00006-x.

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Fernandes, P. J. L. « Contact fatigue in rolling-element bearings ». Engineering Failure Analysis 4, no 2 (juin 1997) : 155–60. http://dx.doi.org/10.1016/s1350-6307(97)00007-1.

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Legin Eyzop, B., et S. Karlsson. « Cyclic contact fatigue of silicon nitride ». Wear 225-229 (avril 1999) : 1303–8. http://dx.doi.org/10.1016/s0043-1648(98)00404-9.

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Kimura, Yoshitsugu, Masami Sekizawa et Akio Nitanai. « Wear and fatigue in rolling contact ». Wear 253, no 1-2 (juillet 2002) : 9–16. http://dx.doi.org/10.1016/s0043-1648(02)00077-7.

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Fernandez Rico, J. E., A. Hernandez Battez et D. Garcia Cuervo. « Rolling contact fatigue in lubricated contacts ». Tribology International 36, no 1 (janvier 2003) : 35–40. http://dx.doi.org/10.1016/s0301-679x(02)00097-x.

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40

Yoshida, Akira. « Rolling Contact Fatigue of Sintered Materials ». Proceedings of the Machine Design and Tribology Division meeting in JSME 2008.8 (2008) : 7–10. http://dx.doi.org/10.1299/jsmemdt.2008.8.7.

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Navarro, C., M. García et J. Domínguez. « Fretting fatigue in a spherical contact ». Journal of Strain Analysis for Engineering Design 37, no 6 (1 août 2002) : 469–78. http://dx.doi.org/10.1243/030932402320950099.

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This article describes different types of tests in fretting fatigue and different geometries for use in testing, comparing mainly cylindrical and spherical contacts and their corresponding advantages and disadvantages. Practical differences can be observed between these two types of tests regarding the alignment of the pads, the level of the loads to be applied, the rigidity in the test rig, the shape of the crack, the localization of the point of initiation of the crack, etc. The loads applied in spherical contact and stress distribution beneath the contact zone are described. As this stress state is multiaxial and non-proportional, the appropriate multiaxial criteria are needed in order to characterize the stress field. An equivalent stress is derived from the criteria and later related to the initiation of the crack. At the same time, with the use of the calculated stresses, a semi-analytical approach using a weight function is described for the determination of the stress intensity factor. The results of a series of fretting fatigue tests have been analysed. The initiation site, the orientation of the crack and, for the tests that did not fail, the length of the crack have been studied using a multiaxial fatigue criterion and linear elastic fracture mechanics (LEFM).
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42

Matvienko, Yu G. « Kinetics of damage in contact fatigue ». Soviet Materials Science 23, no 3 (1987) : 292–94. http://dx.doi.org/10.1007/bf00720892.

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43

Seo, Jung Won, Hyun Kyu Jun, Seok Jin Kwon et Dong Hyeong Lee. « Rolling Contact Fatigue and Wear Behavior of Rail Steel under Dry Rolling-Sliding Contact Condition ». Advanced Materials Research 891-892 (mars 2014) : 1545–50. http://dx.doi.org/10.4028/www.scientific.net/amr.891-892.1545.

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Rolling contact fatigue and wear of rails are inevitable problems for railway system due to wheel and rail contact. Increased rail wear and increased fatigue damage such as shelling, head check, etc. require more frequent rail exchanges and more maintenance cost. The fatigue crack growth and wear forming on the contact surface are affected by a variety of parameters, such as vertical and traction load, friction coefficient on the surface. Also, wear and crack growth are not independent, but interact on each other. Surface cracks are removed by wear, which can be beneficial for rail, however too much wear shortens the life of rail. Therfore, it is important to understand contact fatigue and wear mechanism in rail steels according to a variety of parameters. In this study, we have investigated fatigue and wear characteriscs of rail steel using twin disc testing. Also the comparative wear behavior of KS60 and UIC 60 rail steel under dry rolling-sliding contact was performed.
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44

RUDENKO, Sergei P., et Aleksandr L. VALKO. « CONSTRUCTION OF DEEP CONTACT FATIGUE CURVES FOR SURFACE-HARDENED GEAR WHEELS ». Mechanics of Machines, Mechanisms and Materials 2, no 59 (juin 2022) : 47–53. http://dx.doi.org/10.46864/1995-0470-2022-2-59-47-53.

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Laws of fatigue resistance changes of surface-hardened toothed gears are established. It is shown that the main criterion of serviceability of gear wheels of transmissions of power-saturated machines is deep contact pitting of active surfaces of teeth. Dependence is investigated between the number of cycles before the deep contact destruction of material and the maximal tension of cycle with taking into account the mechanical characteristics and structural parameters in the critical zones of the diffusion layers of the teeth, in which fatigue processes of deep contact destruction of material are developed. Lines of deep contact fatigue of teeth material are constructed by the criterion of equality of hardness value and structural parameters in the zones of fatigue processes development under cyclic contact loading. It is shown, that the deep contact fatigue of gear wheels hardened to a considerable degree is determined by hardness value and structural components of local volumes of teeth subsurface layers. Slope index of the deep contact fatigue lines of gear wheel material have been determined. Correlation coefficients and equations of linear regression have been obtained for each deep contact fatigue line depending on hardness value in the subsurface dangerous zone of the diffusion layer, in which formation and development of fatigue processes occur, leading to the limit state of the highly stressed gear wheels.
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45

Hamadouche, Fella, Habib Benzaama, Mohamed Mokhtari et Miloud Abbes Tahar. « Influence of contact parameters in fretting-fatigue contact 3D problems ». Frattura ed Integrità Strutturale 15, no 55 (28 décembre 2020) : 228–40. http://dx.doi.org/10.3221/igf-esis.55.17.

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A numerical study on the influence of contact parameters on fretting fatigue behavior is carried out by using a new method SFEM (Stretching Finite Element Method) is presented in this article. Several parameters are made to vary: geometric shapes of the mesh, materials and contact parameters. The three-dimensional parametric model is composed by specimen and a pad in full contact. A Fortran Code is used to generate the parametric mesh. The stress intensity factors are calculated by varying the above contact parameters and the stress intensity factor under modes I, II and III are computed..
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46

MAKABE, Chobin, Tateki YAFUSO, Takeshi SUZUKI et Hideo YARA. « Effect of Contact Conditions on Mechanism of Rolling Contact Fatigue. » Journal of the Society of Materials Science, Japan 50, no 12 (2001) : 1311–16. http://dx.doi.org/10.2472/jsms.50.1311.

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47

Zhou, Jianjun, Bowen Yang, Shuaiyuan Li et Junzhou Huo. « Fretting Fatigue Life Prediction of Dovetail Structure Based on Plastic Effect and Sensitivity Analysis of Influencing Factors ». Materials 16, no 9 (4 mai 2023) : 3521. http://dx.doi.org/10.3390/ma16093521.

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Micro relative sliding exists on the contact surface of the main primary equipment’s surface structures, resulting in serious fretting fatigue. The plastic effect causes serious fatigue to the structure under alternating loads. Existing fatigue life prediction models fail to fully consider the shortcomings of fretting and plastic effects, which causes the prediction results to be significantly different to real-lifeworld in engineering situations. Therefore, it is urgent to establish a fretting damage fatigue life prediction model of contact structures which considers plastic effects. In this study, a plastic fretting fatigue life prediction model was established according to the standard structural contact theory. The location of dangerous points was evaluated according to a finite element simulation. The cyclic load maximum stress value was compared with the fretting fatigue test data to confirm the error value, and the error between the proposed fretting fatigue life model and the test value was within 15%. Concurrently, we combined this with mass data analysis and research, as it is known that the contact zone parameters have an impact on fretting fatigue and affect the structural lifespan. With the help of ABAQUS, the fretting numerical calculation of the dovetail tenon model was carried out to analyze the sensitive factors affecting the fretting fatigue life of the dovetail tenon structure. By keeping the fretting load unchanged, the contact area parameters such as contact surface form, contact area width and friction coefficient were changed in order to calculate the fretting stress value, σfretting and the dovetail structure was improved to extend its fretting fatigue life. Finally, it was concluded that fretting fatigue was most sensitive to the width and contact form of the contact area. In actual engineering design, multiple factors should be considered comprehensively to determine a more accurate and suitable width and form of the contact area. For the selection of friction coefficient, on the premise of saving costs and meeting the structural strength requirements, the friction coefficient should be as small as possible, and the problem can also be solved through lubrication during processing.
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48

Hannes, Dave, et B. Alfredsson. « Rolling Contact Fatigue Crack Growth Prediction by the Asperity Point Load Mechanism ». Key Engineering Materials 488-489 (septembre 2011) : 101–4. http://dx.doi.org/10.4028/www.scientific.net/kem.488-489.101.

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The crack path and growth life of surface initiated rolling contact fatigue was investigated numerically based on the asperity point load mechanism. Data for the simulation was captured from a gear contact with surface initiated rolling contact fatigue. The evolvement of contact parameters was derived from an FE contact model where the gear contact had been transferred to an equivalent contact of a cylinder against a plane with an asperity. Crack propagation criteria were evaluated with practically identical crack path predictions. It was noted that the trajectory of largest principal stress in the uncracked material could be used for the path prediction. The mode I fracture mechanism was applicable to the investigated rolling contact fatigue cracks. The simulated path agreed with the spall profile both in the entry details as in the overall shape, which suggested that the point load mechanism was valid not only for initiation but also for rolling contact fatigue crack growth. Different equivalent stress intensity factor ranges were used to estimate the fatigue life, which agreed with the life of the investigated gear wheels.
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49

Lee, Dong Hyong, Jung Won Seo et Seok Jin Kwon. « Numerical Analysis of the Effect of Slip Ratio on the Fatigue Crack Initiation Life in Rolling Contact ». Advanced Materials Research 891-892 (mars 2014) : 1791–96. http://dx.doi.org/10.4028/www.scientific.net/amr.891-892.1791.

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This paper presents a numerical analysis of the effect of slip ratio on the fatigue crack initiation life, considering the tangential traction on the rolling contact surface. The distribution of tangential traction and contact stresses on the contact surface, when rolling contact occurs between two cylindrical test specimens, are obtained using three-dimensional finite element analysis. The effect of slip ratio on the fatigue crack initiation life was evaluated by applying multiaxial fatigue criteria based on critical plane approaches. As a result, the 3D-FE model developed well represent the distribution of tangential traction and contact stresses on the contact surface at stick-slip condition, which is differ from the static or full sliding contact condition. As the slip ratio increases, the maximum tangential traction also increases in slip zone and the location of maximum stress closer to the contact surface in stick zone. The fatigue strength decreased with the increase in the slip ratio. Therefore, it is clear that the slip ratio has an important role in prediction of fatigue crack initiation life on the rolling contact surface.
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Abbasi, F., GH Majzoobi et MM Barjesteh. « Developing a new experimental set up to study fretting fatigue behavior under cyclic contact loading ». Proceedings of the Institution of Mechanical Engineers, Part J : Journal of Engineering Tribology 232, no 7 (20 septembre 2017) : 837–50. http://dx.doi.org/10.1177/1350650117732673.

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The disk slot and blade attachment in the gas turbine engines are operated under both cyclic axial and contact loads simultaneously. In this investigation, a new coupon scale testing apparatus is designed and manufactured to study the fretting fatigue behavior of materials under cyclic contact loads. In this cyclic contact load fretting fatigue device (CCLFFD), a simple synchronized electro-mechanical system is used for generating cyclic contact loads with frequency of 0–200 Hz and magnitude of 0–10 kN. The CCLFFD is well instrumented for adjusting, measuring and online monitoring the contact load frequency, contact load graph, and rotation speed of the servomotors. Repeatability and reliability of the test rig were examined by experiment. The performance of the CCLFFD was verified using the experimental results reported in the literature and also by conducting a number of fretting fatigue tests on Al7075-T6 at different contact load frequencies in this work. The results showed that fretting fatigue was significantly affected by the contact load frequency particularly for high cycle fatigue regime. However, the effect was less important for low cycle fatigue regime and totally insignificant for frequencies higher than 80 Hz.
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