Study of friction and wear mechanisms at high sliding speed

List, Gautier; Sutter, Guy; Arnoux, Jean-Jacques; Molinari, A.

doi:10.1016/j.mechmat.2014.04.011

Cited by 10 publications

(3 citation statements)

References 20 publications

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“…The Kolsky bar is commonly utilized in a torsional configuration to measure friction coefficients [38]- [43], where sliding velocities up to 10 m/s are achievable [38], [39], [43]. Philippon [28] and others [6], [7], [10], [18], [27] coupled a gas gun and dynamometer ring to impart various sliding velocities and normal forces to tribological pairs, as shown in Figure 21. Here, a gas gun is used to transfer a compressive force directly to the mobile specimen, where the setup is similar to a compression Kolksy bar, but without the incident bar.…”

Section: Experimental Measurement Of Frictionmentioning

confidence: 99%

Literature Review on the Theory and Measurement of Dry Sliding Friction of Metals

Euser

Denissen

Yablinsky

et al. 2020

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Section: Experimental Measurement Of Frictionmentioning

confidence: 99%

Literature Review on the Theory and Measurement of Dry Sliding Friction of Metals

Euser

Denissen

Yablinsky

et al. 2020

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“…Using fault topography data, Scholz [1988] found E =7 × 10 4 MPa and k = 2 × 10 −8 m. Figure D5 shows h e as a function of depth, assuming that the normal stress equals the lithostatic stress with a rock density of 3000 kg/m 3 . Clearly, 10 −6 < h e < 10 −4 m. We will consider the same variation range for h * and further assume 10 −6 < h * < 10 −4 m. Note that the characteristic height of contacts in metal is of the order of h * = 10 μm [List et al, 2015] and falls in the range of those estimates for natural faults. This further justifies our choice of a reference value of h * = 10 −5 m, recalling that the impact of this parameter is weak on the model.…”

Section: Journal Of Geophysical Research: Solid Earthmentioning

confidence: 99%

A micromechanical model of rate and state friction: 1. Static and dynamic sliding

Perfettini

Molinari

2017

JGR Solid Earth

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Rate and state friction has been extensively used to explain many features of the seismic cycle but the scaling of the experimentally derived parameters a, b and dc for real faults is problematic. The purpose of this paper is to present a micromechanical model for rate and state friction in which the contact between the two surfaces occur via plastic and elastic contacts. Shear deformation is accommodated in the bulk of cylindrical contacts rather than at the surface of the contact, as done classically. Assuming that the viscoplastic response is governed by the J2 plastic flow theory, we retrieve the rate and state framework. Unlike previous works, we identify the state variable as representing the changes of plastic contact area. In our model, all macroscopic frictional parameters of the rate and state framework are related to the parameters of the elementary contacts. We provide a derivation of the aging evolution law for the state variable and propose a new evolution law that reconciles the aging, Linker‐Dieterich and Nagata evolution laws. We discuss the scaling of the frictional parameters for active faults and landslides. The a and b parameters should have comparable value at fault scale since friction is mostly controlled by plastic contacts at large normal stress (typically hundreds of MPa). Our model predicts that the critical slip distance dc should be scale independent and controlled solely by the plastic contacts.

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“…Zou et al [8] proposed a novel model for the friction between a rotating band and a gun barrel based on the deformation mechanism of the rotating band during projectile engraving. List et al [9] derived an accurate formula for the friction coefficient of a barrel-projectile friction pair by developing a hydrodynamic lubrication friction model and comprehensively considering the extreme working conditions of the high pressure and speed of the friction pair. Shen et al [3] performed a numerical calculation of projectile motion in a barrel assuming a constant projectile-barrel friction coefficient.…”

Section: Introductionmentioning

confidence: 99%

Simulation Study on the Impact Response of Barrels with Different Rifling Profiles during Bullet Engraving

Wei

Cheng

Wang

et al. 2022

Modelling and Simulation in Engineering

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Gun barrel bores are prone to ablative damage and stress concentration under high temperatures, pressures, and dynamic load impacts during bullet engraving, which may result in barrel failure. A dynamic stress analysis during bullet engraving is a prerequisite for barrel life analysis and design. Impact responses during bullet engraving were investigated in this study for rifled barrels with different cross-sectional profiles to improve the match between the dynamic performances of the gun barrel and bullet and effectively extend the barrel service life. First, feature suppression by expression based on a uniform parametrized template was used to perform parametric modeling of a gun barrel with rectangular, trapezoidal, multiarc, and multilateral-arc rifling profiles. Second, theoretical models were constructed considering different rifling structures: a model to calculate the chamber pressure, a model for heat transfer in the barrel during continuous firing, and a model to calculate the friction between a bullet and the barrel wall surface based on shear-slip friction theory. These models were integrated into a simulation, where the ABAQUS (ABAQUS. 6.14.1-4. 2014. DASSAULT SIMULIA.)/Explicit software was used to build a finite element model of the barrel dynamic stress under heat-force-friction coupling during bullet engraving. Finally, the dynamic response stresses were analyzed for bullet engraving into four barrels with different rifling profiles. All four types of barrels developed considerable stress at the junction between the forcing cone and the rifled bone under the same impact load. The stress values of the multiarc and multilateral-arc rifling were far below that for the rectangular and trapezoidal rifling. Thus, the barrels with multiarc and multilateral-arc rifling profiles had a higher impact resistance than the other two barrel types.

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Study of friction and wear mechanisms at high sliding speed

Cited by 10 publications

References 20 publications

Literature Review on the Theory and Measurement of Dry Sliding Friction of Metals

Literature Review on the Theory and Measurement of Dry Sliding Friction of Metals

A micromechanical model of rate and state friction: 1. Static and dynamic sliding

Simulation Study on the Impact Response of Barrels with Different Rifling Profiles during Bullet Engraving

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