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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2022
ISBN: 978-0-8031-7714-7
... Conditioning monitoring of lubricants in operation usually considers different physical and chemical quantities but not functional properties. The identification of the induction time or offset point (“cliff” or “jumping-off point”), after which wear and friction will increase, and thus improve...
eBook Chapter
Series: ASTM Manuals
Publisher: ASTM International
Published: 2019
ISBN: 978-0-8031-7089-6
... stability or the content of ester-based oils in hydraulic systems. hydraulics ester fluid oil ASTM DIN alcohol fatty acid biodegradable lubrication wear friction tribology 553 Chapter 15 | Environmentally Acceptable Ester-Based Hydraulic Fluids Hubertus Murrenhoff,1 Andreas Remmelmann,2...
eBook Chapter
Series: ASTM Manuals
Publisher: ASTM International
Published: 2019
ISBN: 978-0-8031-7089-6
... additive lithium complex calcium sulfonate elastomer complex dropping point semisolid lubricant soap shear thinning thickener wheel bearing ball bearing fluoroether penetration consistency lubricant friction wear tribology Chapter 22 | Lubricating Greases Rajesh Shah1 and William...
eBook Chapter
Series: ASTM Manuals
Publisher: ASTM International
Published: 2019
ISBN: 978-0-8031-7089-6
... This chapter focuses on fundamental principles involved in lubrication and wear. Because this chapter addresses basic design principles of tribological processes in lubrication and wear testing, numerous equations are utilized. The applicability of these relationships to tribological testing...
eBook Chapter
Series: ASTM Manuals
Publisher: ASTM International
Published: 2019
ISBN: 978-0-8031-7089-6
... for an effective testing and modeling methodology. tribology testing traction modeling wear scuffing contact fatigue simulation testing Chapter 47 | Tribology Testing and Modeling Lavern D. Wedeven1 1631 Introduction Tribology is about materials and mechanisms at the interface of mechanical contacts...
eBook Chapter
Series: ASTM Manuals
Publisher: ASTM International
Published: 2019
ISBN: 978-0-8031-7089-6
... This chapter provides various methods to evaluate the friction and wear properties of lubricants and materials. If friction and wear can be easily studied and controlled, then the engineer can select materials and lubricants with a high degree of confidence. Many laboratory tests are used...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2018
ISBN: 978-0-8031-7657-7
... Traditional measurement techniques used to evaluate wear estimates of retrievals are qualitative in nature or lack resolution leading to over- or underestimation of wear volume. The purpose of the study was to utilize new imaging techniques such as three-dimensional laser scanning to measure...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2018
ISBN: 978-0-8031-7657-7
... In this study, a novel heterodyne fringe projection technique was introduced for evaluation of volumetric wear in acetabular insert retrievals. Four historical, gamma irradiated in air, ultrahigh molecular weight polyethylene (UHMWPE) and eight heat-stabilized Duration™ UHMWPE acetabular liner...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2018
ISBN: 978-0-8031-7657-7
... analyses were then used to replicate the loading and deformation observed on the retrievals. Finally, a novel design approach was proposed, one that will enhance the wear and deformation of the polyethylene bearing and constraint surfaces while also enhancing the creation of internal moments at the joint...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2015
ISBN: 978-0-8031-7627-0
... associated with increased wear of the HXLPE bearing surface? Between 2000 and 2014, 890 THA systems were collected in a multi-institutional retrieval program. From these, 508 cobalt-chromium (CoCr) alloy heads, ranging in diameter from 22 mm to 44 mm, from six manufacturers were analyzed along with 216...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2015
ISBN: 978-0-8031-7627-0
... Wear and corrosion of implant metals have been associated with adverse tissue reactions and failures of total hips. However, the factors leading to component wear and corrosion, as well as the clinical effects of wear and corrosion, are not well understood. A visual inspection standard for taper...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2014
ISBN: 978-0-8031-7595-2
... The purpose of this study was to examine the tribofilm formation and the associated degrees of wear that occur in the boundary and mixed lubrication regimes for environmentally friendly synthetic lubricants and their conventional counterparts. Wear was studied using an SRV4 rotational tribometer...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2012
ISBN: 978-0-8031-7507-5
... attributes of the PAG-based bio-hydraulic fluid compared to a widely use general purpose biodegradable hydraulic fluid in the market place. oxidation stability polyalkylene glycol vegetable oil biodegradability wear ester Reprinted from JAI, Vol. 9, No. 2 doi:10.1520/JAI103605 Available online...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2006
ISBN-10: 0-8031-3415-0
ISBN: 978-0-8031-3415-7
... A significant difference in wear scar formation between tested and retrieved knee implants of the same type has been reported. In this study, an Artificial Neural Network (ANN) model has been designed with the aim to gain knowledge of relationships between simulator input parameters...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2006
ISBN-10: 0-8031-3415-0
ISBN: 978-0-8031-3415-7
... was visually examined and scanned with a video-based measurement system to analyze the wear profile. Polishing was the predominant wear pattern, and minor striations were found in the end zone of the wear area. The wear depth increased with higher velocity angles—this relationship appeared to be linear...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2006
ISBN-10: 0-8031-3415-0
ISBN: 978-0-8031-3415-7
... The purpose of this study was to evaluate the wear and surface damage mechanisms of polyethylene in retrieved CHARITE total disc replacements. The retrieved implants showed evidence of adhesive/abrasive wear mechanisms in the central domed region of the implants. In addition, there was also...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2006
ISBN-10: 0-8031-3415-0
ISBN: 978-0-8031-3415-7
.... The current study evaluated the surface texture and topography of lumbar metal-on-metal artificial disks tested in a spine wear simulator compared to an explanted device after twelve months in situ. Six implants were tested under a constant load and unidirectional flexion-extension motion as defined...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2006
ISBN-10: 0-8031-3415-0
ISBN: 978-0-8031-3415-7
... There is currently considerable interest in the wear debris and osteolytic potential of different types of bearings used in total joint replacements. The aim of this study was first to characterize the wear and wear particles generated from two different grades of UHMWPE acetabular cups...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2006
ISBN-10: 0-8031-3415-0
ISBN: 978-0-8031-3415-7
... Wear of total joint replacements is determined gravimetrically in simulator studies. A mix of bovine serum, distilled water, and additives is intended to replicate the lubrication conditions in vivo. Load soak stations are used to correct for weight gain due to fluid absorption. Although...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2006
ISBN-10: 0-8031-3415-0
ISBN: 978-0-8031-3415-7
... Wear testing protocols of ultrahigh molecular weight polyethylene (UHMWPE), which rely on gravimetric or topographic measurements, or both, for wear determination, are usually complicated due to fluid absorption or creep, or both, of the polyethylene samples. In this study we report...