Micromechanical analysis of friction anisotropy in rough elastic contacts

Stupkiewicz, S.; Lewandowski, Maciej; Lengiewicz, Jakub

doi:10.1016/j.ijsolstr.2014.07.013

Cited by 35 publications

(29 citation statements)

References 45 publications

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“…Like in the studies of Stupkiewicz et al [49] and Temizer [76], the computational homogenisation procedure proposed in the present study is not restricted to linear material and kinematics. It can cope with nonlinear materials and finite deformations and, because it is based on finite element techniques, can accommodate geometrical domains of nearly arbitrary complexity.…”

Section: Discussionmentioning

confidence: 98%

“…In their computational homogenisation study, Stupkiewicz et al [49] considered first a simple plane strain configuration consisting of a smooth compliant hyperelastic half-space sliding over an idealised sinusoidal rigid surface. The effects of height asperity and local friction on the resulting computed homogenised global friction were assessed.…”

Section: Discussionmentioning

confidence: 99%

“…A recent micromechanical computational study by Stupkiewicz et al [49] quantified the role of asperity geometry on the observed macroscopic anisotropic friction of rough surfaces. Their approach consisted of generating random micro-topographies of surfaces, applying periodic boundary conditions, assigning a local coefficient of friction, applying macroscopic loading conditions to induce a sliding motion and measuring the resultant global contact forces.…”

Section: Contact Sampling and Averaging Proceduresmentioning

confidence: 99%

“…geometric characteristics of surface topography at a small scale) of materials is a main contributor to friction [48]. It was shown by Stupkiewicz et al [49] that the geometrical effects alone can have a significant impact on the macroscopic frictional response of elastic contacts. Despite this, only a few studies have investigated the contribution of the skin micromesoscopic topography to its global friction response [2].…”

Section: Introductionmentioning

confidence: 99%

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Skin Microstructure is a Key Contributor to Its Friction Behaviour

et al. 2016

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Due to its multifactorial nature, skin friction remains a multiphysics and multiscale phenomenon poorly understood despite its relevance for many biomedical and engineering applications (from superficial pressure ulcers, through shaving and cosmetics, to automotive safety and sports equipment). For example, it is unclear whether, and in which measure, the skin microscopic surface topography, internal microstructure and associated nonlinear mechanics can condition and modulate skin friction. This study addressed this question through the development of a parametric finite element contact homogenisation procedure which was used to study and quantify the effect of the skin microstructure on the macroscopic skin frictional response. An anatomically realistic two-dimensional image-based multilayer finite element model of human skin was used to simulate the sliding of rigid indenters of various sizes over the skin surface. A corresponding structurally idealised multilayer skin model was also built for comparison purposes. Microscopic friction specified at skin asperity or microrelief level was an input to the finite element computations. From the contact reaction force measured at the sliding indenter, a homogenised (or apparent) macroscopic friction was calculated. Results demonstrated that the naturally complex geometry of the skin microstructure and surface topography alone can play as significant role in modulating the deformation component of macroscopic friction and can significantly increase it. This effect is further amplified as the ground-state Young's modulus of the stratum corneum is increased (for example, as a result of a dryer environment). In these conditions, the skin microstructure is a dominant factor in the deformation component of macroscopic friction, regardless of indenter size or specified local friction properties. When the skin is assumed to be an assembly of nominally flat layers, the resulting global coefficient of friction is reduced with respect to the local one. This seemingly counter-intuitive effect had already been demonstrated in a recent computational study found in the literature. Results also suggest that care should be taken when assigning a coefficient of friction in computer simulations, as it might not reflect the conditions of microscopic and macroscopic friction one intends to represent. The modelling methodology and simulation tools developed in this study go beyond what current analytical models of skin friction can offer: the ability to

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Contact Sampling and Averaging Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Skin Microstructure is a Key Contributor to Its Friction Behaviour

et al. 2016

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“…The hierarchical method has the advantage of requiring low computational costs and providing relatively good accuracy, being, therefore, able to incorporate many complex physical phenomena in the simulations. It has been used for analysing many contact problems, as elucidated by Stupkiewicz et al [27]. For instance, Temizer and Wriggers [28] studied inelastic contact considering effect of third bodies and also friction of soft matter [29].…”

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confidence: 99%

Multiscale analysis of the effect of roughness on fretting wear

Pereira

Yue

Wahab

2017

Tribology International

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Cite this article as: K. Pereira, T. Yue and M. Abdel Wahab, Multiscale analysis of the effect of roughness on fretting wear, Tribiology International, http://dx.doi.org/10. 1016/j.triboint.2017.02.024 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Abstract: Fretting occurs when two loaded contacting surfaces are exposed to oscillatory relative movement of small amplitude. Depending on conditions such as surface finishing, coefficient of friction, normal load and slip amplitude, fretting may reduce the service life of a component by fretting wear. The effect of surface roughness on the fretting wear profile is still uncertain and may be significant. However, most of the finite element (FE) models that are used to predict fretting wear do not take it into consideration. In this paper, we propose a multiscale procedure to study roughness effect on fretting wear using FE models. In order to do that, we treat the problem in two scales: a) micro scale to analyse the effect of roughness on the contact pressure for frictionless conditions, and b) macro scale to estimate the wear profile evolution for a cylinder on plane contact configuration.

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Computational Contact Mechanics with the Finite Element Method

Lorenzis

Wriggers

Weißenfels

2017

Encyclopedia of Computational Mechanics Second Edition

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The finite element method (FEM) is a widely used numerical scheme to solve complex partial differential equations stemming from science and engineering. Contact mechanics is one of the application areas that has a huge impact on all areas of science. Here one can name the prediction of earthquakes, impact of waves and naval structures, car crash analysis, bearings, and tire‐road interactions among thousands of other applications. The aim of this contribution is to provide an overview on established and new formulations, discretization schemes, and algorithms that relate to contact mechanics in the context of FEMs.

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Micromechanical analysis of friction anisotropy in rough elastic contacts

Cited by 35 publications

References 45 publications

Skin Microstructure is a Key Contributor to Its Friction Behaviour

Skin Microstructure is a Key Contributor to Its Friction Behaviour

Multiscale analysis of the effect of roughness on fretting wear

Computational Contact Mechanics with the Finite Element Method

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