1-20 of 71 Search Results for

friction laws

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300013
EISBN: 978-1-62708-323-2
... Abstract This chapter reviews the types of friction that are of concern in tribological systems along with their associated causes and effects. It discusses some of the early discoveries that led to the development of friction laws and the understanding that friction is a system effect that can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040067
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the effect of friction and lubrication on forgings and forging operations. The discussion covers lubrication mechanisms, the use of friction laws, tooling and process parameters, and the lubrication requirements of specific materials and forging processes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130133
EISBN: 978-1-62708-284-6
..., and forging tolerances. Wear, plastic deformation processes, and laws of friction are introduced as a group of subjects that have been considered in the case studies. steel forgings crankshaft underfill tube bending spade bit trim tear upset forging failure analysis wear friction cold forging...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400033
EISBN: 978-1-62708-316-4
... , 4.17 – 4.19 ) Criterion Tensile test Hydraulic bulge test Plane strain compression test Shear test In-plane compression test Sources of error Dimensional accuracy, necking Anisotropy Measurement of height, friction Friction Buckling, friction, anisotropy Limit of sheet thickness...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500179
EISBN: 978-1-62708-317-1
... conditions must be achieved. Fig. 9.19 Die-workpiece interface variables at macro scale for tube hydroforming Coulomb’s law is given by τ = μ P . The shear friction law is given by: τ = m k = m 3 σ ¯ where τ is the friction shear stress, μ is the coefficient...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040083
EISBN: 978-1-62708-300-3
... and the following power-law-type flow stress equation was considered. (Eq 8.6) σ ¯ = K ε ¯ n Therefore, a set of material parameters defined by P k = {K,n} and friction factor m f are the unknown parameters that have to be identified. Two experimental quantities: (1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500273
EISBN: 978-1-62708-317-1
... machines, whereas other machines, such as single-purpose AMINO machines, use rigid tools that do not rotate. This use of nonrotating tools has considerable effects on the frictional conditions compared to actively or passively rotating tools. Cold forming oil is usually spread on the surface of the sheet...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.9781627083232
EISBN: 978-1-62708-323-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780267
EISBN: 978-1-62708-281-5
... instances, usually produces undesirable high friction and high wear conditions due to enhanced adhesion between the polymer. Also, poor conductivity of the polymers results in elevated temperature at the polymer/polymer interface, leading to melting and rapid wear. Therefore, the focus of this article...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300301
EISBN: 978-1-62708-323-2
... of counterface in plastic friction. Figure 11.9 shows the COF of the same tribocomponents, same tribosystem, but different normal forces. The COF varies with normal force, contrary to Amontons’s law; it should be a straight line. However, this is not really a contradiction, because Amontons only said...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.9781627083003
EISBN: 978-1-62708-300-3
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500019
EISBN: 978-1-62708-317-1
... and coating) Tool-sheet interface (friction) Deformation work zone (strains, stresses, and forces) Product (dimensions and quality) Environment (handling and safety) The common terminology used in practice for air bending is shown in Fig. 2.2 . Fig. 2.2 Schematic of air bending...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400089
EISBN: 978-1-62708-316-4
... in the drawn cup and (b) the draw-in length, L d , in the flange ( Figure 7.9 ). As the blank holder pressure, P b , increases, the frictional stress, τ, also increases based on Coulomb’s law, as shown in Eq 7.1 . Therefore, lubricants can be evaluated in deep drawing by determining the maximum applicable...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780259
EISBN: 978-1-62708-281-5
... a relatively wide range of conditions, friction force is proportional to normal force, it has been noted that the coefficient of friction is independent of both the apparent area of contact and the velocity between the contacting surfaces. These observations form the classical laws of friction; however, many...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220009
EISBN: 978-1-62708-341-6
... the Curie temperature). A second, less important means of heat generation by induction for the latter class of materials is hysteresis losses. A simplified but qualitatively useful explanation of hysteresis losses states that it is caused by friction between molecules, or so-called magnetic dipoles, when...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
... between applied stresses and crack propagation in the part (see references for more detail). References 16.1 Friction, Lubrication, and Wear Technology , Vol 18 , ASM Handbook , ASM International , 1992 16.2 Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400005
EISBN: 978-1-62708-316-4
..., friction force increases with increasing pressure. In this case, friction conditions are best characterized by Coulomb’s law ( Eq 2.2 ). With increasing pressure, friction force cannot increase indefinitely. It approaches a finite value for very high pressures. At this time, sticking friction conditions...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300047
EISBN: 978-1-62708-323-2
... Abstract This chapter discusses the effect of friction in the context of design. It explains how friction coefficients are determined and how they are used to make sizing and selection decisions. It covers practical issues associated with rolling friction, the use of lubricants...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860035
EISBN: 978-1-62708-338-6
... of the pipe unless the path deviates from the geodesic path. Taking advantage of the principle of friction gives rise to frictionally modified geodesic forms. As the fiber progresses across the surface of the mandrel along a geodesic path, frictional resistance between the fiber and the surface offers...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300271
EISBN: 978-1-62708-323-2
...), partially stabilized zirconia was the most consistent with load, and the friction was always the lowest when many materials were slid on 316 stainless steel to determine the lowest friction metal on ceramic. As shown by the data, contrary to Amonton’s law (μ = F / N ), there is not a direct proportionality...