Rough contact of sliding viscoelastic layers: numerical calculations and theoretical predictions

Menga, Nicola; Afferrante, L.; Demelio, G.; Carbone, Giuseppe

doi:10.1016/j.triboint.2018.02.012

Cited by 48 publications

(33 citation statements)

References 49 publications

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“…Adhesion of surfaces is a widely investigated problem and is of fundamental importance in many elds of science, like biology [1], medicine [2,3], and engineering [4]. The adhesion between rough surfaces is of practical interest both for elastic [5] and viscoelastic bodies [6,7], as roughness alters the e ective surface energy of contacting bodies.…”

Section: Introductionmentioning

confidence: 99%

A note on the effect of surface topography on adhesion of hard elastic rough bodies with low surface energy

Violano

Demelio

Afferrante

2019

Journal of the Mechanical Behavior of Materials

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Adhesion between bodies is strongly influenced by surface roughness. In this note, we try to clarify how the statistical properties of the contacting surfaces affect the adhesion under the assumption of long-range adhesive interactions.Specifically, we show that the adhesive interactions are influenced only by the roughness amplitude hrms, while the rms surface gradient h0rmsonly affects the non-adhesive contact force. This is a remarkable result if one takes into account the intrinsic difficulty in defining $h_{\mathrm{rms}}^{^{\prime }}.$Results are also corroborated by a comparison with self-consistent numerical calculations.

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Section: Introductionmentioning

confidence: 99%

A note on the effect of surface topography on adhesion of hard elastic rough bodies with low surface energy

Violano

Demelio

Afferrante

2019

Journal of the Mechanical Behavior of Materials

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“…They have characterized the viscoelastic friction arising in a moving contact, with the purpose of determining the damping behavior of a roller bearing viscoelastic isolator for seismic applications. Further, the effectiveness of such a semi-analytical approach has also been proved in a fundamental investigation on the rough contact behavior of viscoelastic layers [42], showing significant agreement with one of the most advanced closed-form theories on the topic [11,43].…”

Section: Introductionmentioning

confidence: 71%

The Indentation Rolling Resistance in Belt Conveyors: A Model for the Viscoelastic Friction

2019

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In this paper, we study the steady-state rolling contact of a linear viscoelastic layer of finite thickness and a rigid indenter made of a periodic array of equally spaced rigid cylinders. The viscoelastic contact model is derived by means of Green’s function approach, which allows solving the contact problem with the sliding velocity as a control parameter. The contact problem is solved by means of an accurate numerical procedure developed for general two-dimensional contact geometries. The effect of geometrical quantities (layer thickness, cylinders radii, and cylinders spacing), material properties (viscoelastic moduli, relaxation time) and operative conditions (load, velocity) are all investigated. Physical quantities typical of contact problems (contact areas, deformed profiles, etc.) are calculated and discussed. Special emphasis is dedicated to the viscoelastic friction force coefficient and to the energy dissipated per unit time. The discussion is focused on the role played by the deformation localized at the contact spots and the one in the bulk of the thin layer, due to layer bending. The model is proposed as an accurate solution for engineering applications such as belt conveyors, in which the energy dissipated on the rolling contact of idle rollers can, in some cases, be by far the most important contribution to their energy consumption.

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“…In tapes industry, structural adhesives (Blackman et al, 2009) and pressure-sensitive adhesives (Villey et al, 2015) often show rate-dependent behavior. Moreover, in Goryacheva et al (1996) and Menga et al (2018) it has been shown that contact pressure and internal stress distributions are significantly affected by viscoelastic properties.…”

Section: Introductionmentioning

confidence: 99%

A JKR-Like Solution for Viscoelastic Adhesive Contacts

2021

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A closed-form solution for the adhesive contact of soft spheres of linear elastic material is available since 1971 thanks to the work of Johnson, Kendall, and Roberts (JKR). A similar solution for viscoelastic spheres is still missing, though semi-analytical and numerical models are available today. In this note, we propose a closed-form analytical solution, based on JKR theory, for the detachment of a rigid sphere from a viscoelastic substrate. The solution returns the applied load and contact penetration as functions of the contact radius and correctly captures the velocity-dependent nature of the viscoelastic pull-off. Moreover, a simple approach is provided to estimate the stick time, i.e., the delay between the time the sphere starts raising from the substrate and the time the contact radius starts reducing. A simple formula is also suggested for the viscoelastic pull-off force. Finally, a comparison with experimental and numerical data is shown.

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Rough contact of sliding viscoelastic layers: numerical calculations and theoretical predictions

Cited by 48 publications

References 49 publications

A note on the effect of surface topography on adhesion of hard elastic rough bodies with low surface energy

A note on the effect of surface topography on adhesion of hard elastic rough bodies with low surface energy

The Indentation Rolling Resistance in Belt Conveyors: A Model for the Viscoelastic Friction

A JKR-Like Solution for Viscoelastic Adhesive Contacts

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