In‐Plane Potential Gradient Induces Low Frictional Energy Dissipation during the Stick‐Slip Sliding on the Surfaces of 2D Materials

Small ◽  
2019 ◽  
Vol 15 (49) ◽  
pp. 1904613 ◽  
Author(s):  
Feng He ◽  
Xiao Yang ◽  
Zhengliang Bian ◽  
Guoxin Xie ◽  
Dan Guo ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
2D Materials ◽  
Potential Gradient ◽  
Stick Slip ◽  
Frictional Energy ◽  
Frictional Energy Dissipation

scholarly journals On the Origin of Frictional Energy Dissipation

2019 ◽  
Vol 68 (1) ◽  
Author(s):  
Renfeng Hu ◽  
Sergey Yu. Krylov ◽  
Joost W. M. Frenken
Keyword(s):  
Energy Dissipation ◽  
Energy Loss ◽  
Lattice Vibrations ◽  
Scientific Problem ◽  
Frictional Energy ◽  
Slip Event ◽  
Induced Motion ◽  
Frictional Energy Dissipation ◽  
As If

Abstract The origin of the friction between sliding bodies establishes an outstanding scientific problem. In this article, we demonstrate that the energy loss in each microscopic slip event between the bodies readily follows from the dephasing of phonons that are generated in the slip process. The dephasing mechanism directly links the typical timescales of the lattice vibrations with those of the experienced energy ‘dissipation’ and manifests itself as if the slip-induced motion were close to critically damped. Graphical abstract

Static Axisymmetric Hertzian Contacts Subject to Shearing Forces

1994 ◽  
Vol 61 (2) ◽  
pp. 278-283 ◽  
Author(s):  
R. L. Munisamy ◽  
D. A. Hills ◽  
D. Nowell
Keyword(s):  
Energy Dissipation ◽  
Numerical Method ◽  
Classical Solution ◽  
Dissimilar Materials ◽  
Partial Slip ◽  
Frictional Energy ◽  
Frictional Energy Dissipation

A numerical method is used to resolve the classic Mindlin-Cattaneo partial slip problem for contact between similar and between dissimilar bodies. It is shown that, for similar bodies, the surface frictional energy dissipation is concentrated off the plane of symmetry although the overall dissipation is similar to that predicted by the classical solution. This effect is enhanced for certain combinations of dissimilar materials, where the process of frictional shakedown leads to a displaced contact and hence additional shear compliances.

scholarly journals Wheel-rail dynamics with closely conformal contact Part 2: Forced response, results and conclusions

1997 ◽  
Vol 211 (1) ◽  
pp. 27-40 ◽  
Author(s):  
J Bhaskar ◽  
K. L. Johnson ◽  
J Woodhouse
Keyword(s):  
Energy Dissipation ◽  
Dynamic Models ◽  
Single Point ◽  
Point Contact ◽  
Forced Response ◽  
Normal Displacement ◽  
Transit System ◽  
Frictional Energy ◽  
Frictional Energy Dissipation ◽  
Conformal Contact

The linearized dynamic models for the conformal contact of a wheel and rail presented in reference (1) have been used to calculate the dynamic response to a prescribed sinusoidal ripple on the railhead. Three models have been developed: single-point contact with low or high conformity, and two-point contact. The input comprises a normal displacement Δeiwt together with a rotation Δeiwt applied to the railhead. The output comprises rail displacements and forces, contact creepages and forces, and frictional energy dissipation. According to the Frederick-Valdivia hypothesis, if this last quantity has a component in phase with the input ripple, the amplitude of the ripple will be attenuated, and vice versa. Over most of the frequency range, a pure displacement input (Ψ = 0) was found to give rise, predominantly, to a normal force at the railhead. A purely rotational input (Δ = 0) caused a single point of contact to oscillate across the railhead or, in the case of two-point contact, to give rise to fluctuating out-of-phase forces at the two points. The general tenor of behaviour revealed by the three models was similar: frictional energy dissipation, and hence wear, increases with conformity and is usually of such a phase as to suppress corrugation growth. Thus the association, found on the Vancouver mass transit system, of corrugations with the development of close conformity between wheel and rail profiles must arise from some feature of the system not included in the present models.

On Friction Damping Modeling Using Bilinear Hysteresis Elements

2002 ◽  
Vol 124 (3) ◽  
pp. 367-375 ◽  
Author(s):  
E. J. Berger ◽  
C. M. Krousgrill
Keyword(s):  
Energy Dissipation ◽  
Nonlinear Analysis ◽  
Parameter Space ◽  
Forced Response ◽  
System Response ◽  
Stick Slip ◽  
Zero Mass ◽  
Qualitative Effect ◽  
Qualitative Nature ◽  
Frictional Energy Dissipation

Massless bilinear hysteresis elements are often used to model frictional energy dissipation in dynamic systems. These quasi-static elements possess only two describing parameters, the damper stiffness and the force at which it slips. Bilinear hysteresis elements capture the qualitative nature of friction-damped forced response, but sometimes have difficulty with quantitative comparisons. This paper examines the performance of massless bilinear hysteresis elements as well as the role of damper mass in energy dissipation, and specifically evaluates its influence on the kinematic state of the damper (pure slip, stick-slip, pure stick). Differences between the massless and non-zero mass case are explored, as are the implications on both damper and system response. The results indicate that even small damper mass can have a qualitative effect on the system response, and provide advantages over the massless case. Further, we develop transition maps, describing damper response kinematics in the damper parameter space, which segment the space into two linear analysis regions (pure slip, pure stick) and one nonlinear analysis region (stick-slip). The results suggest non-zero mass dampers which are tuned as optimal vibration absorbers provide substantial resonance response attenuation and substantially reduce the size of the nonlinear analysis region in the damper parameter space.

scholarly journals The frictional energy dissipation and interfacial heat conduction in the sliding interface

AIP Advances ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 115321 ◽  
Author(s):  
Zhiyong Wei ◽  
Yajing Kan ◽  
Yan Zhang ◽  
Yunfei Chen
Keyword(s):  
Heat Conduction ◽  
Energy Dissipation ◽  
Frictional Energy ◽  
Sliding Interface ◽  
Frictional Energy Dissipation
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