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friction data

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Published: 31 August 2023
Fig. 3 Friction data generated from the molecular dynamics simulation, showing the marked difference in friction behavior due to sliding of graphene layers against each other in two stacking configurations More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350043
EISBN: 978-1-62708-315-7
... Abstract This chapter discusses the basic principles of friction and the factors that must be considered when determining its effect on moving bodies in contact. It provides an extensive amount of friction data, including static and kinetic friction coefficients for numerous combinations...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780259
EISBN: 978-1-62708-281-5
... and wear mechanisms; and friction and wear test data used for polymeric materials. friction wear lubrication polymers TRIBOLOGY comes from the Greek word tribos , to rub ( Ref 1 ); friction is derived from the Latin verb fricare , which has the same meaning ( Ref 2 ). Tribology...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300047
EISBN: 978-1-62708-323-2
... the compiler could not find the data. One handbook listed two conditions in a tabulation of coefficients of friction—dry and greasy. Greasy was defined as covered with a thin film of oil. The dry COF ranged from 0.21 to 1.1 for μ s , and 0.18 to 1.4 for μ k . For the greasy condition, they ranged from 0.0052...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040083
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the role of inverse analysis in providing input data for finite element simulations of metal forming processes. It describes the basic procedures for determining flow stress and friction by inverse analysis and for comparing experimental measurements...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040067
EISBN: 978-1-62708-300-3
.... The chapter also describes several test methods for evaluating lubricants and explains how to interpret associated test data. cold forging friction hot forging lubrication 7.1 Introduction In forging, the flow of metal is caused by the pressure transmitted from the dies to the deforming...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300301
EISBN: 978-1-62708-323-2
... on steel, but these data make two very important points: There will always be a range of friction for any tribosystem. Most plastics contain fillers, friction modifiers, and other substances that change the friction compared to the unmodified variety. Fig. 11.8 Ranges of coefficient...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300271
EISBN: 978-1-62708-323-2
... 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 to normal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040237
EISBN: 978-1-62708-300-3
.... 18.1a ) and comparing the experimental data with FEM predictions, it is possible to obtain more reliable flow stress data at higher strain levels. This method, called the inverse analysis technique, has been used to simultaneously determine friction and stress/strain data using a ring test [ Altan et al...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040059
EISBN: 978-1-62708-300-3
..., and the influence of equipment-related parameters such as press speed, contact time, and tooling geometries. forging heat transfer temperature 6.1 Introduction In metal forming processes, both plastic deformation and friction contribute to heat generation. Approximately 90 to 95% of the mechanical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780267
EISBN: 978-1-62708-281-5
... Abstract This article provides details on several of the classifications of polymer wear mechanisms, using wear data and micrographs from published works. The primary goals are to present the mechanisms of polymer wear and to quantify wear in terms of wear rate. The discussion begins...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040185
EISBN: 978-1-62708-300-3
...) Flash thickness, in. (mm) 0.1 (2.5) Flash width, in. (mm) 0.3 (7.6) Perimeter, in. (cm) 13.67 (34.7) Projected area, in. (cm) 6.55 (16.6) Cavity height, in. (mm) 0.56 (14.2) Interface data Friction factor 0.3 Heat-transfer coefficient 0.0039 Btu/in. 2 /s/°F (3.1889 W/m 2...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040107
EISBN: 978-1-62708-300-3
... The interaction between the principal machine and process variables is illustrated in Fig. 10.1 for hot forming processes conducted in presses. As can be seen in Fig. 10.1 , the flow stress, σ ¯ , the interface friction conditions, and the forging geometry (dimensions, shape) determine...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390145
EISBN: 978-1-62708-459-8
..., it is possible to measure the punch force P p , normal force S , and frictional force F ( Fig. 7.3d ), thus obtaining information on the effects of process variables. Additional tests used to simulate tribological conditions in forging are discussed in Sec. 11.1.5 . Transfer of data from steady-state...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 August 2023
DOI: 10.31399/asm.tb.mdsbktmse.t56070001
EISBN: 978-1-62708-451-2
... be given to select one best suited for the planned simulation because potentials are usually parametrized to reproduce experimental data of interest. Usually, a separate file containing the force field parameters must be placed in the working directory. In other cases, the parameters for a potential...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860035
EISBN: 978-1-62708-338-6
... length of mandrel, the buildup at the dwell can be minimized, and the wound length will have been precisely controlled. Fig. 4.3 Advanced method of pipe winding Geodesic Paths and Frictionally Modified Geodesic Paths A more advanced programming software system does not consider what...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300179
EISBN: 978-1-62708-323-2
... weight and 30 weight oil at room temperature. The wear data to the left of center are for the hard steel wear; the data to the right are for the cast iron counterface. 188 / Tribomaterials: Properties and Selection for Friction, Wear, and Erosion Applications 7.8 Adhesive Wear Cast iron is a term...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300421
EISBN: 978-1-62708-323-2
... requires testing. Handbook data only apply to the materials and testing conditions used in arriving at the handbook data. It is also not intuitive what happens to system friction when there are changes in, for example, speed, load, and surface texture. Tests with accurate simulation should provide...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500051
EISBN: 978-1-62708-317-1
... in a finite-element mesh. It explains how to obtain input data, what to expect in terms of output data, and how to predict specific types of defects. In addition, it presents several case studies demonstrating the use of finite elements in blanking and piercing, deep drawing of round and rectangular cups...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300121
EISBN: 978-1-62708-323-2
... car manufacturers should have performed fleet and engine dynamometer tests to verify that lower viscosity oil is beneficial, but they never publish data to support their viscosity recommendations. Maybe low viscosity oils lower engine friction and improve mileage. However, this may be done...