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stick-slip behavior

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Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006361
EISBN: 978-1-62708-192-4
... that should be addressed to ensure that valid data are derived from a friction test. The article presents definitions of terms commonly used in tribology such as static friction, kinetic coefficient of friction, stick-slip behavior, and lubricated friction. It provides information on the precautions that must...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003281
EISBN: 978-1-62708-176-4
... (bushings versus hardened steel shafts) in a linear motion at a speed of 1.6 μm/s (0.00006) in./s). The slow speed caused many materials to display stick-slip behavior. When higher speeds were used, this did not occur. Under such conditions, the speed of the tribosystem should be duplicated as closely...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009006
EISBN: 978-1-62708-185-6
...% each may be necessary to establish a consistent pattern of surface damage. With the inconsistent boundary lubrication conditions that will develop with little lubricant, stick-slip behavior should promote surface cracking. On the other hand, the rough, somewhat unconstrained surface that develops...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004007
EISBN: 978-1-62708-185-6
... , Ref 43 , 75 ), and intermetallics ( Ref 54 , 56 , 76 , 77 ). Occasionally, “stick-slipbehavior is observed due to lubrication breakdown and recovery, in which case the run-out pressure fluctuates both above and below the steady-state value. Stick-slip causes a variation in product diameter...
Book Chapter

By P.H. Shipway
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006414
EISBN: 978-1-62708-192-4
... of the coefficient of friction and the normal load, whereupon slip occurs over the entire contact; this condition is known as gross sliding. Figure 8(b) shows three distinct fretting regimes characterized by the stick-slip behavior of the contact: Stick: Characteristic of very low displacement amplitudes...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006428
EISBN: 978-1-62708-192-4
... for understanding potential material response for self – mated mild steel; but the damage map also provides a good framework to understand other material couples. When the reciprocatory motion is in the range of 25 to 50 microns, cracks can originate at the stick slip interface of the contact zone. Cracks propagate...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003053
EISBN: 978-1-62708-200-6
..., dry pressing, cold isostatic pressing, slip casting, tape casting, roll compaction, extrusion, and injection molding. It describes the advantages, equipment and tooling, and material requirements of green machining, the machining of ceramics in an unfired state with the intent of producing parts...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004016
EISBN: 978-1-62708-185-6
... Slip lines for equal-channel angular extrusion (a) without friction and (b) with maximum friction, 2θ=90° In practice, friction may be different in both channels. For some metals, even the best lubricants in the first channel (τ→0) cannot prevent the material from sticking to the die...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002372
EISBN: 978-1-62708-193-1
... If the amplitude of oscillation is small, the shear strains are elastic, and the contact condition is one of sticking or no-slip . Even under microelastic displacements fatigue cracks can form due to reverse bending at the bases of the contacting asperities. If the amplitude of oscillation is large, depending...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003316
EISBN: 978-1-62708-176-4
... surfaces, and the amplitude of relative displacement. Strain Conditions If the amplitude of oscillation is small, the shear strains are elastic, and the contact condition is one of sticking or no slip . Even under microelastic displacements, fatigue cracks can form due to reverse bending...
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
..., such as molybdenum alloys. Typically, this behavior can be avoided by using lower temperatures and speeds. Surface cracking can also occur at low temperatures and has been attributed to periodic sticking of the extruded product along the die land (stick-slip) during extrusion. Stick-slip occurs when the product...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006422
EISBN: 978-1-62708-192-4
... = μ 2 R meaning the maximum possible draft depends on friction condition and roll size. Once the slab is accepted and drawn through the roll gap, the situation changes considerably. Relative Slip In the absence of spread, continuity can be maintained only if the products of thickness...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005408
EISBN: 978-1-62708-196-2
...). (b) Corresponding finite-element method simulation. Local strain variation: blue = 0 (upper left); red = 1.54 (predominantly lower right) Sticking of the surface of aluminum alloy samples to the tool cannot always be prevented. However, when friction is known, such inhomogeneous tests can...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006534
EISBN: 978-1-62708-207-5
... of surface defects include circumferential (“fir-tree”) cracking, “crow's-feet” cracking, or even longitudinal “splitting” ( Fig. 2 ). The local sticking/slipping mechanisms can cause intense shear zones and resulting surface cracks. If the process temperature, speed, and friction are too high, surface...
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
.... Adapted from Ref 41 . Reprinted with permission from Elsevier Fig. 8 Schematic illustration of partial slip fretting, gross slip fretting, and reciprocation sliding conditions as a function of the displacement amplitude (e.g., sphere-on-flat contact). Adapted from Ref 43 . Reproduced...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005619
EISBN: 978-1-62708-174-0
... described the friction coefficient varying with temperature and vibration cycle by curve-fitting the published experimental data. Based on Coulomb's friction law, the stick-slip contact condition can be identified with the relation of |τ fric | and μ · p . If |τ fric | < μ · p , the friction...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001097
EISBN: 978-1-62708-162-7
... by different methods Properties Press-sinter- re-press Press-sinter- extrude Internal oxidation Preoxidize- press-sinter- extrude Performance characteristics Resistance to arc erosion 3 2 1 1 Resistance to sticking and welding 1 1 2 2 Low contact resistance and temperature rise...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006789
EISBN: 978-1-62708-295-2
..., typically between 1 and 100 μm. If the displacements are below approximately 4 μm, a stick regime is established, and surface damage is negligible. (If some slip is achieved during the first cycles only, a partial slip regime is observed.) If the displacements are between approximately 5 and 50 μm, a mixed...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005526
EISBN: 978-1-62708-197-9
... 14 , 15 , 17 , 18 , 19 ). A simple approach is to introduce a parameter, percentage slip, δ, to quantify the slipping. δ is a number between 0 and 1. δ = 0 denotes a sticking boundary condition, whereas δ = 1 indicates slipping on the tool-workpiece interface. Using δ, the velocity boundary...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006410
EISBN: 978-1-62708-192-4
... of sliding against the tool surface, it requires less energy for the material to shear inside the body of the workpiece, while the surface remains immobile. This is described as sticking friction, although no actual sticking to the die surface needs to occur. From Eq 6 , the condition of sticking is given...