Spall progression life model for rolling contact verified by finish hard machined surfaces

Choi, Youngsik; Liu, C. Richard

doi:10.1016/j.wear.2006.03.041

Cited by 31 publications

(15 citation statements)

References 22 publications

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“…Under these conditions, any crack propagation can be explained only after assuming an effective mode II propagation (or mode II combined with mode III). The mode II propagation was supported by Fleming and Suh [19], Keer and Bryant [20], O'regan et al [21], Kaneta [22] et al, Blake and Cheng [23], and more recently by Choi and Liu [24][25][26]. In contrast, Ding et al [8,9,27,28] clearly distinguished these two different phases.…”

Section: Subsurface Spalling and Case Crushingmentioning

confidence: 96%

Surface and subsurface rolling contact fatigue characteristic depths and proposal of stress indexes

Santus

Beghini

Bartilotta

et al. 2012

International Journal of Fatigue

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The rolling contact fatigue is distinguished into subsurface initiated (spalling and case crushing) and surface initiated (pitting and micropitting). A characteristic depth was identified for each of these mechanism. The characteristic depth of the case crushing is the hardening depth, while for the spalling it is the maximum cyclic shear stress depth. The pitting depth is the size of the crack for which the mode I stress intensity factor range, due to the fluid pressurization, is higher than the threshold. This depth can be similar to the micropitting depth, in the order of 10 µm, for heavily loaded small radius contacts. Rolling contact fatigue cyclic shear stress indexes are then defined on the basis of the characteristic depths, and they identify the load intensity of each rolling contact fatigue mechanism. The characteristic depths and the stress index approach can be used to relate specific tests to component design, without any size effect misinterpretation

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Section: Subsurface Spalling and Case Crushingmentioning

confidence: 96%

Surface and subsurface rolling contact fatigue characteristic depths and proposal of stress indexes

Santus

Beghini

Bartilotta

et al. 2012

International Journal of Fatigue

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“…Kotzalas and Harris [105] established a spall progression life mathematical model for ball endurance testing by extending the Ioannides-Harris fatigue life theory. Choi and Liu [36] defined a crack resistance index based on Ioannides-Harris theory and a wear resistance index based on abrasive wear characteristics to model the spall progression of rolling contact. Qiu et al [165] developed a stiffness-based model to achieve accurate bearing prognosis considering the bearing system as single-degree-offreedom system with its natural frequency related to the system stiffness.…”

Section: Fuzzy Theorymentioning

confidence: 99%

Cloud-enabled prognosis for manufacturing

et al. 2015

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Advanced manufacturing depends on the timely acquisition, distribution, and utilization of information from machines and processes across spatial boundaries. These activities can improve accuracy and reliability in predicting resource needs and allocation, maintenance scheduling, and remaining service life of equipment. As an emerging infrastructure, cloud computing provides new opportunities to achieve the goals of advanced manufacturing. This paper reviews the historical development of prognosis theories and techniques and projects their future growth enabled by the emerging cloud infrastructure. Techniques for cloud computing are highlighted, as well as the influence of these techniques on the paradigm of cloud-enabled prognosis for manufacturing. Finally, this paper discusses the envisioned architecture and associated challenges of cloud-enabled prognosis for manufacturing

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“…The operating conditions during the steady-state phase will finally determine whether the bearing will be subject to rolling contact wear only or if the contact mechanism will develop into a process rolling contact fatigue. In the last stage of rolling contact fatigue of bearing can be divided into two periods (Choi & Liu, 2007). The first period shows no significant change in the vibration amplitude, as the crack initiation and propagation occur below the surface.…”

Section: Surface Texture For Greasementioning

confidence: 99%

Investigation of Wear Mechanism of Ball Bearings Lubricated by Bio-Lubricant

Gasni¹,

Mulyadi²,

Affi³

et al. 2017

IJTech

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Due to increased environmental sensitivity, renewable-based lubricants, and food grade lubricants are being considered potential alternatives to petroleum-based lubricants. Understanding of bio-lubricant in relation to abrasive wear is essential for using ball bearings in industrial implementation. This study focused on wear mechanism on ball bearings lubricated by bio-lubricants. Palm oil and coconut oils were used in this study. Coconut oils were made by two processes, namely dry and wet processing, resulting in three types of oil (virgin coconut oil [VCO], refined coconut oil [RCO], and hydrogenated coconut oil [HCO]). Full-scale bearing life tests were conducted with 300 N load with 2,840 rpm for 6 hours. Method of lubrication was circulating oil by using pump injection to the self-aligning ball bearings. The results show that the main wear mechanism, which impacted on the surfaces of inner race, outer race, and ball for different bio-lubricants, were abrasive and adhesive wear. It found that the abrasion rate was the least severe for VCO. The discrepancies of worn surfaces are thought to be as a result of the physical and chemical properties of bio-lubricants.

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Spall progression life model for rolling contact verified by finish hard machined surfaces

Cited by 31 publications

References 22 publications

Surface and subsurface rolling contact fatigue characteristic depths and proposal of stress indexes

Surface and subsurface rolling contact fatigue characteristic depths and proposal of stress indexes

Cloud-enabled prognosis for manufacturing

Investigation of Wear Mechanism of Ball Bearings Lubricated by Bio-Lubricant

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