Coupled effects of particle overall regularity and sliding friction on the shear behavior of uniformly graded dense sands

AbstractThe interfacial shear behavior in near-equiatomic NiA1 reinforced by sapphire filaments has been examined at room temperature using a fiber pushout test technique. The loaddisplacement data indicate a large variability in the initial interface failure stress, although reverse push behavior indicates a comparatively constant interfacial sliding friction stress. The observed behavior suggests that the presence of asperities on the fiber surfaces and nonuniformities in fiber diameter require constrained plastic flow within the NiAl matrix in order for interfacial shear to occur. The location, shape, severity, and distribution of fiber asperities as well as the uniformity of fiber diameter are critical to the interfacial shear process.

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Shear Behavior of Full-Scale Prestressed Concrete Girders: Comparison Between AASHTO Specifications and LRFD Code

PCI Journal ◽

10.15554/pcij.05011996.48.62 ◽

1996 ◽

Vol 41 (3) ◽

pp. 48-62 ◽

Cited By ~ 19

Author(s):

Mohsen A. Shahawy ◽

Barrington deV Batchelor

Keyword(s):

Prestressed Concrete ◽

Shear Behavior ◽

Full Scale ◽

Concrete Girders ◽

Prestressed Concrete Girders

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Contact Analysis of Tire Tread Rubber on Flat Surface with Microscopic Roughness3

Tire Science and Technology ◽

10.2346/1.2346375 ◽

2006 ◽

Vol 34 (4) ◽

pp. 237-255 ◽

Cited By ~ 2

Author(s):

M. Kuwajima ◽

M. Koishi ◽

J. Sugimura

Keyword(s):

Surface Roughness ◽

Finite Element ◽

Sliding Friction ◽

Tangential Force ◽

Partial Slip ◽

Real Contact Area ◽

Element Analysis ◽

Real Contact ◽

Local Slip ◽

Tread Rubber

Abstract This paper describes experimental and analytical studies of the dependence of tire friction on the surface roughness of pavement. Abrasive papers were adopted as representative of the microscopic surface roughness of pavement surfaces. The rolling∕sliding friction of tire tread rubber against these abrasive papers were measured at low slip velocities. Experimental results indicated that rolling∕sliding frictional characteristics depended on the surface roughness. In order to examine the interfacial phenomena between rubber and the abrasive papers, real contact length, partial slip, and apparent friction coefficient under vertical load and tangential force were analyzed with two-dimensional explicit finite element analysis in which slip-velocity-dependent frictional coefficients were considered. Finite element method results indicated that the sum of real contact area and local partial slip were larger for finer surfaces under the same normal and tangential forces. In addition, the velocity-dependent friction enhanced local slip, where the dependence of local slip on surface roughness was pronounced. It proved that rolling∕sliding friction at low slip ratio was affected by local frictional behavior at microslip regions at asperity contacts.

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Study of evolution processes of cracks and pores in surface area of heat-resistant coated steels when frictional heating during sliding friction with life-time lubrication

All the materials Encyclopedic Reference Book ◽

10.31044/1994-6260-2019-0-11-8-15 ◽

2019 ◽

pp. 8-15

Author(s):

P. I. Malenko ◽

◽

O. B. Kryuchkov ◽

D. B. Belov ◽

A. Yu. Leonov ◽

...

Keyword(s):

Surface Area ◽

Sliding Friction ◽

Frictional Heating ◽

Life Time ◽

Heat Resistant

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KAISER ALUMINUM ALLOY 4026

Alloy Digest ◽

10.31399/asm.ad.al0385 ◽

2003 ◽

Vol 52 (10) ◽

Keyword(s):

Wear Resistance ◽

Aluminum Alloy ◽

Physical Properties ◽

Tensile Properties ◽

Sliding Friction ◽

High Strength ◽

Heat Treating ◽

Kaiser Aluminum ◽

Friction Resistance

Abstract Kaiser Aluminum alloy 4026 has high strength and good wear resistance, as well as galling resistance. It was developed for sliding friction resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on heat treating. Filing Code: AL-385. Producer or source: Tennalum, A Division of Kaiser Aluminum.

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Structure and properties of gas-dynamic coatings and evaluation of their use in sliding friction pairs

10.36652/1813-1336-2020-16-6-260-266 ◽

2020 ◽

pp. 260-266

Author(s):

V.E. Arkhipov ◽

T.I. Murav’eva ◽

M.S. Pugachev ◽

O.O. Shcherbakova

Keyword(s):

Aluminum Oxide ◽

Sliding Friction ◽

Metal Layer ◽

Structural Phase ◽

Mechanical Mixture ◽

Structural Factors ◽

Coating Structure ◽

Corundum Structure ◽

Deposited Metal ◽

Copper Zinc

The problems of changes in the coating structure depending on the composition of the sprayed mechanical mixture using copper particles and mixture of copper and zinc particles (" brass") and the effect of structural factors on the tribological properties of the deposited metal layer are considered. The results of X-ray structural, phase, chemical and durometric analyzes, as well as tribological testing of coatings are presented. It is found that structure with hardness of ≈102.7 HV is formed in the coating from mechanical mixture of particles of copper and aluminum oxide (corundum). Numerous pores are observed in the structure of the deposited metal layer, the main size of which does not exceed 2 μm. In the coating from mechanical mixture of particles copper, zinc and aluminum oxide (corundum), structure is formed based on copper with hardness of ≈106.5 HV, zinc — ≈49.7 HV, intermetallic compounds (γ- and ε-phases) — ≈168.7 HV, the mass fraction of which is 62.0, 7.9 and 24.2 %, respectively. Both coatings can be used in sliding friction pairs.

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