Role of surface roughness in hysteresis during adhesive elastic contact

Kesari, Haneesh; Doll, Joseph C.; Pruitt, Beth L.; Cai, Wei; Lew, Adrián J.

doi:10.1080/09500839.2010.521204

Cited by 68 publications

(90 citation statements)

References 36 publications

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“… Using a numerical approach based on continuum mechanics, we produced results that are consistent with those obtained previously in molecular dynamics simulations [25,29].…”

Section: Resultssupporting

confidence: 74%

“…Figure 6 shows an example of hysteresis behavior in the reaction force observed in the numerical results. These results are similar to those captured in molecular dynamics simulations [25] and experimental measurements [26], but were captured here using a numerical approach based on continuum mechanics.…”

Section: Adhesion Hysteresissupporting

confidence: 70%

“…This phenomenon is not captured by classical contact theories, such as Hertz, JKR and Maugis-Dugdale, and has been attributed to dynamic effects, such as those due to material viscoelasticity and ambient and surface moisture, or to materialspecific chemical reactions [25]. However, many quasistatic contact measurements also display hysteresis and it is possible to have depth-dependent hysteresis during perfect elastic contacts.…”

Section: Adhesion Hysteresismentioning

confidence: 94%

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Numerical modeling of adhesion and adhesive failure during unidirectional contact between metallic surfaces

et al. 2016

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Abstract:In this work, we developed a finite element modeling approach to study adhesion during unidirectional contact between a two-dimensional plane-strain square and a flat slab. The surfaces were metallic or ceramic, and we analyzed different pairs of materials and their adhesion intensity using a FORTRAN subroutine (DLOAD) connected to a commercial finite element code Abaqus, which provided the surface attractive forces based on the Lennard-Jones interatomic potential using Hamaker constants. We considered adhesive loads during both the approach and separation of the surfaces. During the separation step, we modeled the material transfer between surfaces due to adhesion with respect to damage initiation and propagation at the flat slab. The parameters considered in the simulations include normal load, chemical affinity, and system size, and we analyzed different conditions by comparing the interaction forces during approach and withdrawal. This work also presents: (i) a description of the evolution of energy dissipation due to adhesion hysteresis, (ii) the formation-growth-breakage process of the adhesive junctions and the material transfer between surfaces, and (iii) an adhesive wear map based on a proposed novel equation that correlates the material parameters and material loss due to adhesion. The results indicate that the chemical affinity between bodies in contact is more related to adhesion than the applied load. In addition, the ratio between the material strength and elastic modulus seems to be an important factor in reducing adhesive wear.

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“… Using a numerical approach based on continuum mechanics, we produced results that are consistent with those obtained previously in molecular dynamics simulations [25,29].…”

Section: Resultssupporting

confidence: 74%

Section: Adhesion Hysteresissupporting

confidence: 70%

Section: Adhesion Hysteresismentioning

confidence: 94%

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Numerical modeling of adhesion and adhesive failure during unidirectional contact between metallic surfaces

et al. 2016

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“…This unstable behavior has been used in Ref. [33] to justify the hysteresis observed in JKR experiments with AFM tips.…”

Section: Resultsmentioning

confidence: 99%

“…For example Refs. [30][31][32][33] proved that adhesion hysteresis can be observed even in the case of elastic solids provided that the contact occurs between rough surfaces.The study presented herewith aims to provide an additional contribution along this direction. By employing a methodology based on a pure continuum mechanics approach, which belongs to the class of Boundary Element Methods (BEMs) [5,10,34], we analyse numerically the loadingunloading adhesive contact of rough solids by including adhesion in terms of surface energy, i.e.…”

Section: Introductionmentioning

confidence: 99%

Loading-unloading hysteresis loop of randomly rough adhesive contacts

2015

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In this paper we investigate the loading and unloading behavior of soft solids in adhesive contact with randomly rough profiles. The roughness is assumed to be described by a self-affine fractal on a limited range of wave-vectors. A spectral method is exploited to generate such randomly rough surfaces. The results are statistically averaged, and the calculated contact area and applied load are shown as a function of the penetration, for loading and unloading conditions. We found that the combination of adhesion forces and roughness leads to a hysteresis loading-unloading loop. This shows that energy can be lost simply as a consequence of roughness and van der Waals forces, as in this case a large number of local energy minima exist and the system may be trapped in metastable states. We numerically quantify the hysteretic loss and assess the influence of the surface statistical properties and the energy of adhesion on the hysteresis process.

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Adhesion Hysteresis Due to Chemical Heterogeneity

Popov

2020

Springer Tracts in Mechanical Engineering

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According the JKR theory of adhesivecontact, changes of the contact configuration after formation of the adhesive neck and before detaching are completely reversible. This means, that after formation of the initial contact, the force-distance dependencies should coincide, independently of the direction of the process (indentation or pull-off). In the majority of real systems, this invariance is not observed. The reasons for this may be either plastic deformation in the contacting bodies or surface roughness. One further mechanism of irreversibility (and corresponding energy dissipation) may be chemical heterogeneity of the contact interface leading to the spatial dependence of the specific work of adhesion. In the present paper, this “chemical” mechanism is analyzed on a simple example of an axisymmetric contact (with axisymmetric heterogeneity). It is shown that in the asymptotic case of a “microscopic heterogeneity”, the system follows, during both indentation and pull-off, JKR curves, however, corresponding to different specific surface energies. After the turning point of the movement, the contact area first does not change and the transition from one JKR curve to the other occurs via a linear dependency of the force on indentation depth. The macroscopic behavior is not sensitive to the absolute and relative widths of the regions with different surface energy but depends mainly on the values of the specific surface energy.

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Role of surface roughness in hysteresis during adhesive elastic contact

Cited by 68 publications

References 36 publications

Numerical modeling of adhesion and adhesive failure during unidirectional contact between metallic surfaces

Numerical modeling of adhesion and adhesive failure during unidirectional contact between metallic surfaces

Loading-unloading hysteresis loop of randomly rough adhesive contacts

Adhesion Hysteresis Due to Chemical Heterogeneity

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