...Oleg V. Tolochko; Ilya A. Kobykhno; Svetlana I. Khashirova; Azamat A. Zhansitov; Alexander D. Breki; Michael Nosonovsky Polyetheretherketone (PEEK) is a promising polymer material for tribological applications. Friction and wear tests of PEEK samples versus steel with different melt flow indices...

..., the present model has been used to simulate the contact between a polymethyl methacrylate (PMMA) substrate and a rigid sphere driven by step, ramped, and harmonic normal loads. The validated model and numerical method can successfully compute the viscoelastic contact responses of polymer-based materials...

... of the present study suggest that expanding the use of UHMWPE and other polymers in orthopaedic applications where cartilage is replaced by an engineered biomaterial is worth exploring. While UHMWPE yielded the lowest friction coefficient throughout the duration of sliding against cartilage, it produced friction...

...Arthur Francisco; Houssein Abbouchi; Bernard Villechaise The background of the present study is the rolling contact fatigue (RCF) in a brittle polymer disk. The disk has been tested on a two disk machine, under controlled normal and tangential loads, with no global slip. After several million...

.... tapered roller bearing dynamics cage behavior elastic deformation stress elastic deformation finite element analysis internal stresses mechanical contact polymers rolling bearings 27 02 2008 09 09 2008 04 12 2008 I would like to thank all my company colleagues...

...A. Ovcharenko; G. Halperin; I Etsion The creep of a polymer sphere contacting a rigid flat under a constant normal load is investigated experimentally. An optical technique is used to observe in situ the evolution of the contact area while the increase of contact interference is measured...

...Masayuki Kanatsu; Hiroyuki Ohta A running torque analysis was performed on axially loaded deep groove ball bearings lubricated with a polymer lubricant. The analysis included a Type I and a Type II bearing. The Type I bearing has a stamped steel riveted cage with its cavity packed with the polymer...

...Susumu Ogata; Hedong Zhang; Kenji Fukuzawa; Yasunaga Mitsuya Using a coarse-grained molecular dynamics simulation based on the bead-spring polymer model, we reproduced the film distribution of molecularly thin lubricant films with polar end groups coated on the disk surface and quantified the film...

... used for surgeries, microassembly, and micromanipulation. 03 04 2006 01 05 2007 friction piezoelectric materials piezoelectricity polymers surface phenomena piezoelectric material PVDF friction surface characterization Polyvinylidene fluoride (PVDF) is a well...

... of this paper is to contribute to that understanding. In past years, one of the primary causes of bearing failure was contact fatigue and delamination of the polyethylene material ( 2 3 ). It was found that this was caused by oxidation of the polymer after γ irradiation sterilization in air ( 4 5...

... have affected the ease of separation of particles from the bulk bone cement. It was noted that the retrieval from which this PMMA was taken showed severe scratching on both the polyethylene and the tibial tray. 24 06 2005 21 11 2005 wear prosthetics biomechanics polymers bone...

... of attenuation of light through a slide, the particles were illuminated using a red filter from the top (reflected light) and a green filter from the bottom (transmitted light). Green light passes up through UHMWPE debris (the polymer being birefringent), and looks green, yellow or light pink in the microscope...

... the predicted and measured results. The validity of the formula for the first-order estimation of web-roller interface problems is verified experimentally. 25 02 2004 06 10 2005 rollers (machinery) traction polymers thin films permeability manufacturing systems Continuous flexible...

... arthroplasty. 02 03 2004 06 07 2005 friction wear polymers prosthetics biomechanics biomedical materials mechanical contact There continues to be considerable uncertainty regarding the principal determinants of tribology in total joint arthroplasty articulations employing...

.... Depending upon material fabrication and geometric constraints, the candidate material under wear investigation can be fabricated into either pins or sheets; typically the softer material (the polymer in a metal/polymer combination) is used as the upper bearing surface. Recently, many polymers have been...

... was lubricated by 10W–30 oil. Surface analysis revealed that the formation of lubricative protective layers on the surfaces in contact is crucial to reducing friction, and more importantly, wear. FTIR results confirmed that film transfer occurs in the case of POM. 19 08 2004 05 05 2005 polymers...

... surfaces. Primary and secondary forms of the additive are shown to form films of different morphology and properties. Colloid probe atomic force microscopy has also been applied to study the boundary film-forming properties of functionalized viscosity modifier polymers. It is shown that these polymers can...

... and visualizing the intensity of crossing motions experienced by all locations on the UHMWPE tibial insert surface simultaneously over any specified time duration. The formulation combines the calculation of tribological quantities with the estimation of the most probable direction of polymer orientation...

... of both the cup inclination angle and the combined flexion-extension and internal-external rotation on the lubrication were analyzed. 17 03 2004 22 03 2005 polymers lubrication prosthetics biomedical materials biomechanics physiological models orthopaedics Elastohydrodynamic...

... on this method, the test arrangement shown in Table 3 was developed. The levels of each operating condition characterizing each trial are listed as well as the resulting wear expressed in mass loss, for each polymer. Clearly, the test duration for each trial, which ranged from 2.5 h to 4.5 days, can be readily...