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coefficient of friction

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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
... Simple application Very efficient for stable operating conditions (after running-in, high contact pressure, low oil temperature) Definition of average coefficient of friction required Does not predict gear scuffing during running-in Inefficient at high oil temperatures Does not explain...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006829
EISBN: 978-1-62708-295-2
... the wear evolution of a sintered steel displaying a significant fluctuation of the friction coefficient, depending on the loading condition. Adapted from Ref 42 Fig. 14 Illustration and chart of the quantification of wear rate under gross slip using the accumulated friction energy parameter...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001807
EISBN: 978-1-62708-241-9
... [ 10 , 18 ] show that the sites of cracks’ initiation may be influenced by friction coefficient to some extent. The cracks mainly initiate on the subsurface when the coefficient of friction is less than 0.3, while the cracks initiate mainly on surface if it is larger than 0.3. In present article...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003562
EISBN: 978-1-62708-180-1
.... (d) 3 × 10 5 cycles Fig. 32 Plot of the coefficient of friction versus the number of fretting cycles for three selected materials tested on steel. PTFE, polytetrafluoroethylene Fig. 33 Plot of contact resistance versus the number of fretting cycles Fig. 34 Typical...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006806
EISBN: 978-1-62708-329-4
... or by localized friction effects. The robust lubricant, shown by the dashed line in Fig. 6 , suggests that a lubricant with mineral oil containing antiwear additives and EP additives significantly reduces the coefficient of friction regardless of the operating temperature. There is a hump in the dashed-line...
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
... of Glass Fabric Reinforced Polyamide Composites Filled with CuO and PTFE , Wear , Vol 200 , 1996 , p 95 – 104 14. da Silva C.H. , Tanaka D.K. , and Sinatora A. , The Effect of Load and Relative Humidity on Friction Coefficient between High Density Polyethylene on Galvanized...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001619
EISBN: 978-1-62708-225-9
... of preventing fretting damage is to allow relative movement between surfaces to occur but with as low a coefficient of friction as possible. This can be accomplished by ensuring good lubrication between the faying surfaces. When a plain lubricant is ineffective in reducing fretting, the addition of low-friction...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001817
EISBN: 978-1-62708-241-9
... ratio, and the density of the wire material were taken as 200 GPa, 0.3, and 7800 kg/m 3 , respectively. The tensile strength of the rope, which was a type of EEIPS, was considered as 2160 N/mm 2 . The coefficient of friction between wires was in the meanwhile assumed to be 0.2. In this study...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001621
EISBN: 978-1-62708-227-3
... is to allow relative movement between surfaces to occur but with as low a coefficient of friction as possible. This can be accomplished by ensuring good lubrication between the faying surfaces. When a plain lubricant is ineffective in reducing fretting, the addition of low-friction-type material...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001783
EISBN: 978-1-62708-241-9
..., the investigation provides information on not only better materials, but also design changes intended to reduce wear and increase service life. bushing wear relative hardness aluminum bronze distortion microstructural analysis coefficient of friction AMPCO 45 (aluminum bronze) UNS 63000 D2 (high...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001620
EISBN: 978-1-62708-229-7
... of preventing fretting damage is to allow relative movement between surfaces to occur but with as low a coefficient of friction as possible. This can be accomplished by ensuring good lubrication between the faying surfaces. When a plain lubricant is ineffective in reducing fretting, the addition of low-friction...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001649
EISBN: 978-1-62708-234-1
... is the applied toque at the nut, T p is the locking torque of the nut, p is the thread pitch, d 2 is the thread pitch diameter, dm is the nut-base friction diameter, and µ thread and µ base are the thread and nut-base coefficients of friction, respectively. The C i are constants related to the individual...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003564
EISBN: 978-1-62708-180-1
... propagation to be highly dependent on the coefficient of friction between the crack faces. Several attempts have been made to explain the wear mechanisms in brittle materials ( Ref 19 ). In the case of brittle materials, cracks may occur on the surface, due to tension or subsurface cracks parallel...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001809
EISBN: 978-1-62708-180-1
... Fig. 3 The friction of sliding bearing pairs for three different lubricants. Fig. 2 Approximate relationship of coefficient of friction to Sommerfeld number, η N / p. Abstract Abstract This article discusses the classification of sliding bearings and describes the major groups...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001788
EISBN: 978-1-62708-241-9
...) as illustrated in Fig. 3 , respectively. The small discrepancy in the results may be due to the factors such as definition of extrusion ratio, stress definition, different simulation software and solution procedure, different frictional coefficient, etc. Fig. 3 Effective stress distribution obtained...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003565
EISBN: 978-1-62708-180-1
... model based on an Archard-type wear law ( Ref 3 ). Starting with the relationship for wear volume, W : (Eq 5) W = k P x H where P is the load (N), x is the sliding distance (m), H is the hardness, and k is a nondimensional wear coefficient. Load can be replaced by friction...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003572
EISBN: 978-1-62708-180-1
... and, rather essentially, friction coefficient. Similarly, reinforcement generally reduces wear but not always the coefficient of friction. Generally, reinforced polymers have multiple or multifunctional fillers that can have synergistic and/or antagonistic interactions with respect to wear performance...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006793
EISBN: 978-1-62708-295-2
... with the relationship for wear volume, W : (Eq 5) W = k P x H where P is the load (in Newtons), x is the sliding distance (in meters), H is the hardness, and k is a nondimensional wear coefficient. Load can be replaced by friction force divided by the friction coefficient, μ. Friction force...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001383
EISBN: 978-1-62708-215-0
... to 465 ft . lb) are specified for both front and rear studs. These high torque levels are typically achieved by using air impact wrenches. Actual clamp load levels attained in the field may vary due to inexperience in the use of impact wrenches, thread contamination which changes the coefficient...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003560
EISBN: 978-1-62708-180-1
... wear modes in martensitic steels. References References 1. Rabinowicz E. , Friction and Wear of Materials , 2nd ed. , John Wiley & Sons, Inc. , 1995 , p 5 – 7 2. Colangelo V.J. and Heiser F.A. , Analysis of Metallurgical Failures , 2nd ed. , John Wiley...