Numerical tribology of a dry contact

Renouf, Mathieu; Massi, Francesco; Fillot, Nicolas; Saulot, Aurélien

doi:10.1016/j.triboint.2011.02.008

Cited by 104 publications

(61 citation statements)

References 126 publications

(137 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our choice is justified by previous fractal analyses that have been performed on real surfaces such as in magnetic tapes, thin-film rigid disks, steel disks, plastic disks, and diamond films [54]. The fractal description we adopt here has been used in previous studies of friction where friction was related to the shear stress on the real contact area, with simplifications such as rough to flat contact or rigid to elastic-elastic or elastic-plastic contact [55][56][57]. Here we consider the rough to rough contact of simulated natural surfaces and neglect asperity deformation.…”

Section: Weierstrass-mandelbrot Fractal Surfacesmentioning

confidence: 99%

Static friction between rigid fractal surfaces

et al. 2015

View full text Add to dashboard Cite

Using spheropolygon-based simulations and contact slope analysis, we investigate the effects of surface topography and atomic scale friction on the macroscopically observed friction between rigid blocks with fractal surface structures. From our mathematical derivation, the angle of macroscopic friction is the result of the sum of the angle of atomic friction and the slope angle between the contact surfaces. The latter is obtained from the determination of all possible contact slopes between the two surface profiles through an alternative signature function. Our theory is validated through numerical simulations of spheropolygons with fractal Koch surfaces and is applied to the description of frictional properties of Weierstrass-Mandelbrot surfaces. The agreement between simulations and theory suggests that for interpreting macroscopic frictional behavior, the descriptors of surface morphology should be defined from the signature function rather than from the slopes of the contacting surfaces.

show abstract

Section: Weierstrass-mandelbrot Fractal Surfacesmentioning

confidence: 99%

Static friction between rigid fractal surfaces

et al. 2015

View full text Add to dashboard Cite

show abstract

“…After a calibration of the experimental setup and a first parametrical analysis (radial expansion, rotational speed, and contact surface properties) [16,17], an identification of the instability states is performed, with or without creation of third-body, using spectrogram of in-plane and/or out-of-plane acceleration. Figure 2 shows the spectrogram of a first experiment performed with a radial expansion of 30 lm and a rotation speed x ¼ 0:1 m=s.…”

Section: Identification Of Instability Statesmentioning

confidence: 99%

First-Body Versus Third-Body: Dialogue Between an Experiment and a Combined Discrete and Finite Element Approach

Renouf

Nhu

Saulot

et al. 2014

Journal of Tribology

Self Cite

View full text Add to dashboard Cite

The present paper proposes to analyze relations between the behavior of two bodies in contact (local stress and vibration modes) and the rheology of third-body particles. Experiments are performed on a system composed of a polycarbonate disk in contact with a steel cylinder, where birefringent property of polycarbonate allows us to observe shear-stress isovalues. Multiscale numerical simulations involve the coupling between fi-nite elements and discrete elements to model simultaneously nonhomogeneous third-body flows within a confined contact and dynamical behavior of the bodies in contact. Compar-isons between experiments and simulations are performed on the dynamic response of the system, the stress distribution, as well as the evolution of third-body particles within the contact. Such comparisons exhibit not only qualitative results but also quantitative ones and suggest a new approach to study in deeper third-body rheology.

show abstract

“…Numerical techniques such as Ab-Initio [8], Discrete Element Method [9,10], Discrete Dislocation Dynamics [11], Finite Element Method [12,13] and Molecular Dynamics [14][15][16] have been used to study contact/friction problems. Two of the most classical techniques are the Finite Element Method [17,18] and the Molecular Dynamics [19].…”

Section: Modeling Techniques Of Contact At Nanoscalementioning

confidence: 99%

MD/FE Multiscale Modeling of Contact

Ramisetti

Anciaux

Molinari

2014

Fundamentals of Friction and Wear on the Nanoscale

View full text Add to dashboard Cite

Limitations of single scale approaches to study the complex physics involved in friction have motivated the development of multiscale models. We review the state-of-the-art multiscale models that have been developed up to date. These have been successfully applied to a variety of physical problems, but that were limited, in most cases, to zero Kelvin studies. We illustrate some of the technical challenges involved with simulating a frictional sliding problem, which by nature generates a large amount of heat. These challenges can be overcome by a proper usage of spatial filters, which we combine to a direct finite-temperature multiscale approach coupling molecular dynamics with finite elements. The basic building block relies on the proper definition of a scale transfer operator using the least square minimization and spatial filtering. Then, the restitution force from the generalized Langevin equation is modified to perform a two-way thermal coupling between the two models. Numerical examples are shown to illustrate the proposed coupling formulation.

show abstract

Numerical tribology of a dry contact

Cited by 104 publications

References 126 publications

Static friction between rigid fractal surfaces

Static friction between rigid fractal surfaces

First-Body Versus Third-Body: Dialogue Between an Experiment and a Combined Discrete and Finite Element Approach

MD/FE Multiscale Modeling of Contact

Contact Info

Product

Resources

About