Adhesion of Elastic Thin Films: Double Peeling of Tapes Versus Axisymmetric Peeling of Membranes

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

doi:10.1007/s11249-013-0227-6

Cited by 63 publications

(61 citation statements)

References 59 publications

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“…The present theoreticalnumerical comparison is all the more justified, since preliminary experimental data, acquired for standard adhesive tapes on a smooth flat PMMA surface subjected to a central vertical force, confirm theoretical multiple peeling predictions (see ref. 19 ). A number of papers in the literature have considered the hypothesis that tapes can undergo frictional sliding before detaching (see e.g.…”

Section: Discussionmentioning

confidence: 99%

“…In previous work, N. Pugno addressed the problem of multiple peeling of a tape from a substrate, and then compared it to the case of conical peeling 17,19 , generalizing the single peeling theory by Kendall 20 and finding an optimal peeling angle, which is a function of tape rigidity and surface energy, at which adhesion is maximised 5 . Also, it was shown that it is possible to consider a multiple peeling problem as a superposition of single peeling ones 17 .…”

Section: Introductionmentioning

confidence: 99%

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Hierarchical multiple peeling simulations

et al. 2014

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ARTICLEThis journal is © The Royal Society of Chemistry 2013 J. Name., 2013, 00, 1-3 | 1 The phenomenon of the exceptional dry adhesion achieved by natural biological materials has been widely investigated in recent years. In particular, the analysis of the terminal elements of gecko pads and their specific structure and topology has led to the development of bioinspired synthetic fibrillar adhesives, including mushroom-shaped tips for optimizing adhesion. To model the expected adhesion and detachment behaviour of multiple contacts, in the past we have derived a theory of multiple peeling, extending the pioneering energy -based single peeling theory of Kendall, including large deformations and pre-stretching. In this contribution, we study the problem of the adhesion of single and multiple contacts using Finite Element analysis, with the aim of studying complex peeling geometries. Both non-hierarchical tape-like and hierarchical geometries are considered, and the adhesive properties of are compared, showing a marked improvement in the latter case. Results are promising and the numerical approach can be exploited in future attempts to determine optimal configurations and improve the adhesion of artificial bioinspired structures.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hierarchical multiple peeling simulations

et al. 2014

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“…On one side, we have quite traditional components requiring to be redesigned according to the trend of modern engineering that prompts to boost reliability and energy efficiency: car tyres and mechanical rubber seals are possible examples where a better understanding of the energy dissipation and, in the second case, of the percolation mechanism can really improve a everyday-life component. On the other side, there is a wide variety of innovative pioneering devices that, to be fully developed, need a sharp improvement in our theoretical knowledge: novel bio-inspired adhesives ( [1], [10], [18], [19], [20], [27], [23], [28]) and mechanical and electrical micro systems (MEMS) ( [2], [1]) have, for example, a limited diffusion owing to the significant limitations in the understanding of their physical working principles.…”

Section: Introductionmentioning

confidence: 99%

Mechanics of rough contacts in elastic and viscoelastic thin layers

Putignano

Carbone

Dini

2015

International Journal of Solids and Structures

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Contact mechanics between rough solids usually relies on the half-space approximation, which assumes that the contact area dimension is much smaller than the thickness of the layers of materials that characterise the surfaces of the contacting bodies. However, such simplifying assumption is often inadequate when industrially relevant applications are considered, in particular those of biomechanical interest. Indeed, a large variety of systems, including not only classical engineering applications such as gear boxes, shafts, tyres, etc., but also biological tissues such as human skin, is characterised by superficial coatings; very often the mechanical properties of these coatings are very different from those of the bulk region of the bodies in contact. The aim of this paper is to shed light on the role played by the thickness of the layer of material used as a coating, with specific focus on the contact between a rigid rough surface and a thin deformable layer bonded to a rigid substrate. * Corresponding author. Phone: +44 020 7594 7064Email address: c.putignano12@imperial.ac.uk (C. Putignano) Preprint submitted to International Journal of Solids and Structures March 25, 2015Starting from a recently developed Boundary Element formulation (Carbone and Putignano, 2013), we derive a methodology which accounts for finite thickness by a corrective coefficient modulating the classical Greens function, and extends our analyses to periodic domains. This enables to avoid border effects and provides an innovative tool to tackle viscoelastic contacts with realistic roughness. This is exploited to perform a thorough investigation of the mechanisms responsible for frictional losses in layered systems characterised by different materials, thickness and loading conditions. Results show that decreasing the layer thickness corresponds to an increase in the contact stiffness. Furthermore, in the case of viscoelastic layer, particular attention has to be paid to the changes in the viscoelastic dissipation due to the finite thickness of the surface layer.

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“…Assuming that closure of the orifice is achieved through hairbased adhesion of the protuberances, we can estimate its mechanical behaviour via the peeling of a conical membrane; accordingly, we find [32] a force versus displacement dimensionless curve of type P ¼ 4d 3 27((1 þ a) 2=3 À 1) 3 , where P ¼ F/(2pEr 0 t/(1 2 v 2 )) is the dimensionless vertical force, F is the applied force, E is the Young modulus, v is the Poisson ratio, t is the sucker thickness, r 0 is the protuberance radius, a ¼ r/r 0 , where r is the sucker radius, and d ¼ D/r 0 , where D is the vertical displacement. The critical dimensionless condition for detachment is G ¼ 2d 4 27(1 þ a) 4=3 ((1 þ a) 2=3 À 1) 4 , where G ¼ 2g/(Et/(1 2v 2 )) and g is the surface energy per unit area of the protuberance.…”

Section: Appendix a Adhesion Constitutive Lawmentioning

confidence: 99%

Unveiling the morphology of the acetabulum in octopus suckers and its role in attachment

et al. 2015

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In recent years, the attachment mechanism of the octopus sucker has attracted the interest of scientists from different research areas, including biology, engineering, medicine and robotics. From a technological perspective, the main goal is to identify the underlying mechanisms involved in sucker attachment for use in the development of new generations of artificial devices and materials. Recently, the understanding of the morphology of the sucker has been significantly improved; however, the mechanisms that allow attachment remain largely unknown. In this work, we present new anatomical findings: specifically, a protuberance in the acetabular roof in five different octopus species; previously, this protuberance was identified by the authors in Octopus vulgaris . Moreover, we discuss the role of the protuberance and other anatomical structures in attachment with minimal energy consumption.

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Adhesion of Elastic Thin Films: Double Peeling of Tapes Versus Axisymmetric Peeling of Membranes

Cited by 63 publications

References 59 publications

Hierarchical multiple peeling simulations

Hierarchical multiple peeling simulations

Mechanics of rough contacts in elastic and viscoelastic thin layers

Unveiling the morphology of the acetabulum in octopus suckers and its role in attachment

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