Partial slip incomplete contacts under constant normal load and subject to periodic loading

2016 ◽  
Vol 108-109 ◽  
pp. 115-121 ◽  
Author(s):  
D.A. Hills ◽  
R.M.N. Fleury ◽  
D. Dini
Keyword(s):  
Normal Load ◽  
Partial Slip ◽  
Periodic Loading ◽  
Constant Normal Load

Frictional shakedown in a complete contact

2003 ◽  
Vol 38 (4) ◽  
pp. 329-338 ◽  
Author(s):  
R Saez ◽  
A Mugadu ◽  
J Fuenmayor ◽  
D. A Hills
Keyword(s):  
Normal Load ◽  
Partial Slip ◽  
Shearing Force ◽  
Slip Regime ◽  
Contact Configuration ◽  
Bound Theorem ◽  
Oscillatory Shearing ◽  
Constant Normal Load ◽  
Complete Contact ◽  
Plastic Shakedown

The phenomenon of frictional shakedown is investigated by considering a complete contact configuration for which a stable partial slip regime exists; a tilted square-ended rigid punch is pressed against an incompressible half-plane by an offset constant normal load and subject to an oscillatory shearing force. The analysis shows that analogies might be drawn with conventional plasticity nomenclature and that, under certain conditions, Melan's lower bound theorem of plastic shakedown may be invoked, leading to the elimination of steady state slip. The implications of these results to fretting contacts are discussed.

Frictional complete contacts subject to shear and bulk tension

2008 ◽  
Vol 222 (12) ◽  
pp. 2301-2309 ◽  
Author(s):  
N Banerjee ◽  
D Dini ◽  
D A Hills
Keyword(s):  
Normal Load ◽  
Cyclic Shear ◽  
Edge Angle ◽  
Subsequent Application ◽  
Constant Normal Load

This paper provides a set of ‘maps’ showing the response of three example frictional complete contacts (with edge angle of 60°, 90°, and 120°) subject to a constant normal load and the subsequent application of cyclic shear and bulk tension, the latter present in only one body. The maps define the region of full adhesion, the nature of violations, and conditions under which they arise.

Rock joint modeling using a visco-plastic multilaminate model at constant normal load condition

2006 ◽  
Vol 24 (5) ◽  
pp. 1449-1468 ◽  
Author(s):  
Reza Mahin Roosta ◽  
Mohammad Hossein Sadaghiani ◽  
Ali Pak ◽  
Yaser Saleh
Keyword(s):  
Normal Load ◽  
Rock Joint ◽  
Load Condition ◽  
Joint Modeling ◽  
Constant Normal Load ◽  
Constant Normal Load Condition

On the Edge Singularity of an Actuator Disk with Large Constant Normal Load

1977 ◽  
Vol 21 (02) ◽  
pp. 125-131
Author(s):  
G. H. Schmidt ◽  
J. A. Sparenberg
Keyword(s):  
Potential Theory ◽  
Normal Load ◽  
Curved Surface ◽  
Singular Behavior ◽  
Nonlinear Potential Theory ◽  
Edge Singularity ◽  
Actuator Disk ◽  
Nonlinear Potential ◽  
Constant Normal Load ◽  
Special Case

In this paper some aspects of the nonlinear potential theory of actuator disks are considered. A rather general formulation of the problem for a prescribed load on a curved surface is given. For the special case of constant normal load and no incoming velocity the singular behavior of the flow at the edge of the disk is discussed.

Partial slip contact analysis for a monoclinic half plane

2020 ◽  
pp. 108128652096283
Author(s):  
İ Çömez ◽  
Y Alinia ◽  
MA Güler ◽  
S El-Borgi
Keyword(s):  
Integral Equations ◽  
Half Plane ◽  
Singular Integral ◽  
Integral Transform ◽  
Mixed Boundary ◽  
Normal Load ◽  
Fibrous Composite ◽  
Singular Integral Equations ◽  
Contact Stresses ◽  
Partial Slip

In this paper, the nonlinear partial slip contact problem between a monoclinic half plane and a rigid punch of an arbitrary profile subjected to a normal load is considered. Applying Fourier integral transform and the appropriate boundary conditions, the mixed-boundary value problem is reduced to a set of two coupled singular integral equations, with the unknowns being the contact stresses under the punch in addition to the stick zone size. The Gauss–Chebyshev discretization method is used to convert the singular integral equations into a set of nonlinear algebraic equations, which are solved with a suitable iterative algorithm to yield the lengths of the stick zone in addition to the contact pressures. Following a validation section, an extensive parametric study is performed to illustrate the effects of material anisotropy on the contact stresses and length of the stick zone for typical monoclinic fibrous composite materials.

scholarly journals Fretting Wear Behavior and Damage Mechanisms of Inconel X-750 Alloy in Dry Contacts

2019 ◽  
Vol 2019 ◽  
pp. 1-15
Author(s):  
Ibrohim A. Rustamov ◽  
Ozoda Sh. Sabirova ◽  
Zixi Wang ◽  
Yuming Wang
Keyword(s):  
Wear Behavior ◽  
Normal Load ◽  
Fretting Wear ◽  
Partial Slip ◽  
Test Duration ◽  
Material Transfer ◽  
Friction Forces ◽  
Frictional Properties ◽  
Load Tests ◽  
Oxidation Mechanisms

Tribological behavior of the Inconel X-750 alloy disk subjected to fretting against the GCr15 steel ball was investigated in an ambient laboratory air with relative humidity of 55–65%. A high-frequency oscillating Optimol SRV 4 tribometer was employed to execute dry fretting tests in the partial and gross slip regimes under constant 100 N normal load. Tests were carried out for 10, 30, and 90 minutes, and the friction forces vs. displacement amplitudes were monitored during the test duration. Posttest examinations were conducted utilizing advanced tools such as 3D optical surface profiler, scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). The main objective was to obtain wear scar evolutions, frictional properties, and degradation mechanisms under the different running conditions over time. It was found that fretting wear behaviors of friction pairs were strongly influenced by fretting regimes. Degradation evolutions were greatly influenced by fretting time during partial slip regimes, i.e., evolving from asperity deformation and slight damage to the fatigue crack and material transfer. However, the combination of adhesive, abrasive, delamination, and wear oxidation mechanisms was repeated during the entire gross slip fretting process.

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