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lubrication modeling

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Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006385
EISBN: 978-1-62708-192-4
... and lubrication modeling of extrusion processes. The article also discusses the fundamentals of extrusion technology of titanium alloys and aluminum. It concludes with information on two forms of wear in extrusion, namely, adhesive and abrasive wear. aluminum defects deformation direct extrusion...
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Published: 01 January 2001
Fig. 8 Compression molding process can be modeled as a lubrication approximation, with h << L. More
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Published: 09 June 2014
Fig. 31 Simplified solid model of crankshaft bearing/cheek section with lubrication hole in bearing surface. More
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Published: 31 December 2017
Fig. 20 Engineering model for wedge flow showing velocity field in the lubricant. Source: Ref 70 More
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006429
EISBN: 978-1-62708-192-4
... pumps. (1) Fluid film formation, (2) mechanical strength, (3) heat balance or life of rolling bearing, (4) cavitation The limits of lubrication of a bearing surface of the slippers have been modeled and the results are illustrated in Fig. 2 . Metal-metal contact during the pump delivery stroke...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006370
EISBN: 978-1-62708-192-4
... models are generally applicable only for dry contacts, they are often applied for lubricated conditions as well, mainly because of the difficulty in applying numerical approaches to estimate friction as described subsequently. In such cases, friction and heat transfer coefficients should be recognized...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002474
EISBN: 978-1-62708-194-8
..., this is another way by which a lubricant can affect wear. Wear design methodology consists of four general activities: system analysis, model selection, data selection, and verification. In order to perform these activities successfully, it is necessary to have a basic understanding of wear behavior...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005417
EISBN: 978-1-62708-196-2
... coefficient heat-transfer coefficient computer simulations oxide scales hot metal ring test thermomechanical processing KNOWLEDGE OF FRICTION AND HEAT TRANSFER is vital to the understanding and operation of metal forming. Modeling and numerical simulations are now extensively used for optimization...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006365
EISBN: 978-1-62708-192-4
..., that is, the lubrication regime, sliding speed, and contact pressure. Therefore, the aim of this article is to make an overview of available surface-texturing techniques, main texturing parameters, and their effect on tribological performance as well as modeling possibilities. Surface-Texturing Techniques Many...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006409
EISBN: 978-1-62708-192-4
.... The accuracy of these techniques does not only depend on the numerical accuracy. Today it is mainly the accuracy of the physics behind the models that is a limiting factor. Where quite reliable models have been developed for full-film lubrication, good models for boundary lubricated and dry systems are still...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006423
EISBN: 978-1-62708-192-4
... ): η = η 0 e β T and Tattersall proposed a model based on drawing speed expressed as ( Ref 37 ): η = η 0 e β v In general, the viscosity of solid lubricants is greater than the viscosity of liquid lubricants, which enables establishing hydrodynamic films at lower...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006421
EISBN: 978-1-62708-192-4
... capabilities of laser surface engineering for tribological applications by means of integrated computational process modeling. chemical cleanliness laser surface heating laser surface melting laser patterning laser dimpling laser-synthesized coatings lubricated environment nonlubricated...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003558
EISBN: 978-1-62708-180-1
... of mild and severe wear morphology. (a) A lubricated sliding wear scar on steel in the mild wear regime. (b) The appearance of the same type of scar in the severe wear regime Generally, by characterizing the wear situation in these manners, there is sufficient information to formulate a model...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006393
EISBN: 978-1-62708-192-4
... surfaces interact (elastohydrodynamic lubrication film/composite roughness, because the lambda ratio is the primary model used). Temperature/speed Bulk conditions such as these control the concentrated contacts of a bearing. Load zone/alignment Factors impacting load and actual stress within all...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006399
EISBN: 978-1-62708-192-4
... Abstract Tribology is the study of friction, lubrication, and wear. It is a multidisciplinary subject covering the mechanics of contacting surfaces, their roughness characteristics, lubrication, and material behavior under normal load as well as in traction. This article focuses on well...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
...; in extreme cases, sliding motion can be prevented by a very high coefficient of friction or a combination of material transfer and adhesion. Metals and alloys are particularly prone to adhesive wear, with the majority of adhesive wear failures being related to the breakdown of the lubrication film...
Book Chapter

By Rob Bosman
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006381
EISBN: 978-1-62708-192-4
... is therefore more pronounced than in oil-lubricated bearings. Nonetheless, the models developed for the oxidation of lubricating oil also hold here. See Ref 4 and 11 for an overview. The oxidation of the thickener itself, however, is a topic that has received less attention, while it can have quite...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003571
EISBN: 978-1-62708-180-1
... classification is based on the two-term model that divides wear mechanisms into interfacial and bulk or cohesive. The second is based on the perceived wear mechanism. The third classification is specific to polymers and draws the distinction based on mechanical properties of polymers. In this classification...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006425
EISBN: 978-1-62708-192-4
.... Common methods of using lubricants and coatings in sheet forming processes are also described. sheet forming deep drawing bending shearing wear galling wear lubricants coating TRIBOLOGY of the three main sheet forming processes is discussed: deep drawing, bending, and shearing...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006397
EISBN: 978-1-62708-192-4
... Abstract This article begins with the basic concept of friction and with the general approaches that can be used to control or minimize it. It focuses on the factors influencing rolling friction: surface topography, composition, subsurface microstructure, and lubrication conditions. The article...