Rolling Contact Fatigue Observation of Radial PPS Bearings under Dry Condition

2016 ◽  
Vol 703 ◽  
pp. 197-201 ◽  
Author(s):  
Koshiro Mizobe ◽  
Toshihiko Matsumura ◽  
Yuji Kashima ◽  
Katsuyuki Kida
Keyword(s):  
Fatigue Behavior ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Fatigue Tests ◽  
Rolling Contact ◽  
Polyphenylene Sulfide ◽  
Material Structure ◽  
Suitable Material ◽  
Dry Conditions

Polyphenylene sulfide (PPS) is a suitable material for bearings which are used under dry conditions. We performed rolling contact fatigue tests using radial PPS bearings and investigated changes in the material structure and fatigue behavior under dry conditions. From these tests, we found that the bearings stop moving for two reasons: melting of wear tracks and build up of adhesion film on the surfaces in a race.

Friction Coefficient and Wear of PEEK-PTFE Hybrid Radial Ball Bearings under Dry Conditions

2021 ◽  
Vol 1020 ◽  
pp. 114-119
Author(s):  
Kazutoshi Hiraki ◽  
Koshiro Mizobe ◽  
Takahiro Matsueda ◽  
Yuji Kashima ◽  
Katsuyuki Kida
Keyword(s):  
Friction Coefficient ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Fatigue Tests ◽  
Rolling Contact ◽  
Frictional Heat ◽  
Wear Loss ◽  
Ball Bearings ◽  
Operation Temperature ◽  
Dry Conditions

In this paper, in order to investigate friction coefficient and wear of PEEK-PTFE hybrid radial bearings, rolling contact fatigue tests were performed under radial loads ranging from 93N to 387N at 600rpm in dry conditions. It was found that friction coefficients were 0.013 to 0.032 throughout the tests. Operation temperature followed the change in the friction coefficient, and PEEK-PTFE radial ball bearings exhibited stable performance even though the temperature locally approached 100 °C due to frictional heat. Moreover, wear loss of bearing components excluding alumina balls increased exponentially with increase of load.

Influence on Tribological Behavior of PEEK Composite Film Layer on PEEK-PTFE Bearings with Artificial Defect in Dry Condition

2021 ◽  
Vol 904 ◽  
pp. 243-249
Author(s):  
Hitonobu Koike ◽  
Koshiro Mizobe ◽  
Katsuyuki Kida
Keyword(s):  
Composite Film ◽  
Tribological Behavior ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Fatigue Tests ◽  
Rolling Contact ◽  
Artificial Defect ◽  
Peek Composite ◽  
Film Layer ◽  
Number Of Cycles

In order to explore influence on tribological behavior of PEEK composite film layer in PEEK-PTFE composite radial alumina ball bearings, rolling contact fatigue tests were performed by using the PEEK bearing’s inner rings with the artificial defects in dry condition. When rotation speed and applied load were 600 rpm and 98 N, the number of cycles of the PEEK-PTFE bearings reached 1.0×107 fatigue cycles. The artificial defects with 0.02 mm depth on the raceway surface of the PEEK inner ring was covered with PEEK composite film accumulation.

Failure Observation of 3D-Printed Thrust Bearing Specimens at Cross Section Observations in Dry Conditions

2018 ◽  
Vol 777 ◽  
pp. 446-450 ◽  
Author(s):  
Koshiro Mizobe ◽  
Masahiro Inagaki ◽  
Katsuyuki Kida
Keyword(s):  
3D Printing ◽  
Fracture Behavior ◽  
Thrust Bearing ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Dry Conditions ◽  
Moving Direction ◽  
Bearing Race ◽  
3D Printed

3D printing methods are developing and they have become popular recently. 3D printing can easily make complex and seamless parts, however, there are questions about their strength. In particular, the strength of the places where the lamination layer joins is important. We performed rolling contact fatigue (RCF) tests in dry conditions using 3D-printed bearing race and observed the fracture behavior and cracks. We found that the main crack is related to the stress moving direction.

Effect of PTFE Retainer on Friction Coefficient in Polymer Thrust Bearings under Dry Contact

2013 ◽  
Vol 683 ◽  
pp. 90-93 ◽  
Author(s):  
Koshiro Mizobe ◽  
Takashi Honda ◽  
Hitonobu Koike ◽  
Edson Costa Santos ◽  
Yuji Kashima ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Fatigue Tests ◽  
Rolling Contact ◽  
Low Friction ◽  
Friction Forces ◽  
Thrust Bearings ◽  
Dry Contact

Polyetheretherketone (PEEK) is a tough semi-crystalline thermoplastic polymer with excellent mechanical properties. While abilities of polyphenylenesulfide (PPS) are similar to PEEK, former material cost was lower than later. Polytetrafluoroethylene (PTFE) is well known because of its low friction coefficient and self lubrication ability. The objective of this study is to observe the friction coefficient of hybrid bearings, PTFE retainer sandwiched with PPS-races or PEEK-races. Rolling contact fatigue tests were performed and in situ friction forces wear measured. It is concluded that the PTFE retainer reduced friction coefficient.

Experimental Investigations Upon Fatigue Life of Circular Contacts With Transversal Furrow

2005 ◽  
Author(s):  
Delia F. Cerlinca ◽  
Emanuel N. Diaconescu
Keyword(s):  
Fatigue Life ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Fatigue Tests ◽  
Geometric Parameters ◽  
Rolling Contact ◽  
Experimental Results ◽  
Experimental Investigations ◽  
Contact Fatigue Life

Rolling contact fatigue depends essentially on both surface and subsurface populations of defects. First, this paper describes experimental results obtained in rolling contact fatigue tests in the presence of a furrow oriented transversally to the race-way. Then an attempt to predict theoretically the effect of geometric parameters of the furrow upon contact fatigue life is described.

Effect of ultrasonic surface rolling on microstructure and rolling contact fatigue behavior of 17Cr2Ni2MoVNb steel

2019 ◽  
Vol 366 ◽  
pp. 321-330 ◽  
Author(s):  
Ya-Long Zhang ◽  
Fu-Qiang Lai ◽  
Sheng-Guan Qu ◽  
Hai-Peng Liu ◽  
Dong-Sheng Jia ◽  
...  
Keyword(s):  
Fatigue Behavior ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact

scholarly journals Influence of groove shape on rolling contact fatigue of PEEK-PTFE hybrid radial bearings in dry conditions

2019 ◽  
Vol 264 ◽  
pp. 01005
Author(s):  
Masahiro Inagaki ◽  
Koshiro Mizobe ◽  
Katsuyuki Kida ◽  
Yuji Kashima
Keyword(s):  
Molecular Structure ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Temperature Rise ◽  
Solid State Nmr ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Thermal Failure ◽  
Dry Conditions

In this study, rolling contact fatigue (RCF) tests were performed in order to investigate the effect of groove radius on the life of PEEK-PTFE hybrid radial bearings. Furthermore, solid state NMR spectroscopy was performed in order to investigate the molecular structure of PEEK. It was found that groove radius shape was related to limitations of the bearings, and the molecular structure of the PEEK was not changed by the temperature rise in this test. Furthermore, thermal failure of the PEEK was not affected by oxidation during RCF test.

Rolling contact fatigue behavior of Ti/TiN coated ADI by cathodic arc deposition

2017 ◽  
Vol 43 (5) ◽  
pp. 4263-4271 ◽  
Author(s):  
Diego Alejandro Colombo ◽  
Juan Miguel Massone ◽  
María Dolores Echeverría ◽  
Adriana Beatriz Márquez
Keyword(s):  
Fatigue Behavior ◽  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Cathodic Arc Deposition ◽  
Cathodic Arc ◽  
Arc Deposition
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