Adhesion between elastic bodies with rough surfaces

Zilberman, S.; Persson, B. N. J.

doi:10.1016/s0038-1098(02)00179-5

Cited by 42 publications

(31 citation statements)

References 9 publications

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“…For that purpose a computer analysis of deformation behavior of the individual suction cup under dominant loading in the radial direction was created. On the base of obtained results a stability limit was defined step by step for which a proportion between an absorbed elastic energy U el and energy of adhesion U ad is very important from the mathematical standpoint [18,19]. If we proceed from the assumption that…”

Section: Safety Aspects Of Vacuum Holding System Of Robotmentioning

confidence: 99%

Service Robots for Motion and Special Applications on the Vertical Oriented Walls

Horák¹,

Novotný²,

Starý³

2018

Service Robots

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This chapter is focused on the area of mobile systems of service robots for motion on the vertically oriented glass walls (e.g., facades of high-rise building) with the aim of their using in many inspection and technological applications. Preliminary part clearly maps the basic mechanical principles and approaches to mobile platform design with respect to the concept of kinematic chain and type of actuators. Conclusions of extensive research activities are presented, and on this background, the new design development of mechanics of robot mobile platform was made and uses two parallel placed parallelograms. The control system is based on an industrial computer, includes a module for wireless communication, and is equipped with a laser and an ultrasonic position sensor. Movement members are equipped with individual electric actuators and vacuum gripping system, which consists of smart ejectors in combination with active suction cups. Given that the load character of the suction cups during the robots movement on the vertical wall is very unfavorable, considerable authors' attention has been paid to the analysis of the deformation behavior of suction cups so as to determine the limits of external radial load to the stable contact, and discusses the possibility of increasing the radial load of gripping elements in relation to the contact surfaces character and vacuum levels.

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Section: Safety Aspects Of Vacuum Holding System Of Robotmentioning

confidence: 99%

Service Robots for Motion and Special Applications on the Vertical Oriented Walls

Horák¹,

Novotný²,

Starý³

2018

Service Robots

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“…In the case of a rigid body in contact with an elastic body, the elastic modulus, * E is given by The net surface displacement on the elastic body within the contact region is given by [3], [4]…”

Section: Pressure Distribution and Displacement On The Surfacementioning

confidence: 99%

“…Zilberman and Persson [3,4] investigated an adhesion contact of a largely wavy surface and solved it numerically. They considered the curvature rather than the straight line of the contact area in the calculation of interfacial term of the total energy.…”

Section: Introductionmentioning

confidence: 99%

“…Considering the limitations of the work of Johnson [2] and Zilberman and Persson [3,4], the present work is intended to obtain an analytical solution for an equilibrium condition of the system for combination of their works under zero external pressure. In addition, the effect of the thermodynamic work of adhesion as well as the effect of the surface roughness on the system is investigated.…”

Section: Introductionmentioning

confidence: 99%

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Analytical solution of adhesion contact for a rigid sinusoidal surface on a semi-infinite elastic body

Sriwijaya¹,

Takahashi²,

Jatmiko³

2007

WIT Transactions on Engineering Sciences, Vol 55

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An analytical solution of adhesion contact for a rigid sinusoidal surface on a semi-infinite elastic body is presented. The solution for an equilibrium condition of the system for a combination of the work of Johnson [International Journal of Solids and Structures, 32(3-4), pp. 423-430, 1995] and Zilberman and Persson [Solid State Communications, 123(3-4), pp. 173-177, 2002; Journal of Chemical Physics, 118(14), pp. 6473-6480, 2003] under zero external pressure is obtained. The interfacial term of the total energy is calculated by considering the curvature of the contact area following the approach of Zilberman and Persson rather than the straight line of the contact area as Johnson. Our results agree with both the analytical result of Johnson for a slightly wavy surface and the numerical results of Zilberman and Persson for a largely wavy surface at the limitations of their assumptions. The equilibrium contact width is clearly expressed and the effect of the surface roughness is discussed.

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“…21 and 22. Both solids, the block and the substrate, were gold. We used the same elastic modulus and Poisson ratio for the block and the substrate, which were Eϭ7.72ϫ10 10 Pa and ϭ0.42 for gold. We used systems with two types of substrates-atomically flat and ''nanocorrugated'' ͑see details below͒.…”

Section: The Modelmentioning

confidence: 99%

The effect of surface roughness on the adhesion of solid surfaces for systems with and without liquid lubricant

Самойлов

Sivebæk

Persson

2004

The Journal of Chemical Physics

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We present molecular dynamics results for the interaction between two solid elastic walls during pull-off for systems with and without octane (C8H18) lubricant. We used two types of substrate—flat and corrugated—and varied the lubricant coverage from ∼1/8 to ∼4 ML (monolayers) of octane. For the flat substrate without lubricant the maximum adhesion was found to be approximately three times larger than for the system with the corrugated substrate. As a function of the octane coverage (for the corrugated substrate) the pull-off force first increases as the coverage increases from 0 to ∼1 ML, and then decreases as the coverage is increased beyond monolayer coverage. It is shown that at low octane coverage, the octane molecules located in the substrate corrugation wells during squeezing are pulled out of the wells during pull-off, forming a network of nanocapillary bridges around the substrate nanoasperities, thus increasing the adhesion between two surfaces. For greater lubricant coverages a single capillary bridge is formed. The adhesion force saturates for lubricant coverages greater than 3 ML. For the flat substrate, during pull-off we observe discontinuous, thermally activated changes in the number n of lubricant layers (n−1→n layering transitions), whereas for the corrugated substrate these transitions are “averaged” by the substrate surface roughness.

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Adhesion between elastic bodies with rough surfaces

Cited by 42 publications

References 9 publications

Service Robots for Motion and Special Applications on the Vertical Oriented Walls

Service Robots for Motion and Special Applications on the Vertical Oriented Walls

Analytical solution of adhesion contact for a rigid sinusoidal surface on a semi-infinite elastic body

The effect of surface roughness on the adhesion of solid surfaces for systems with and without liquid lubricant

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