Peel-Zone Model of Tape Peeling Based on the Gecko Adhesive System

Pesika, Noshir S.; Tian, Yu; Zhao, Boxin; Rosenberg, Kenneth J.; Zeng, Hongbo; McGuiggan, Patricia; Autumn, Kellar; Israelachvili, Jacob N.

doi:10.1080/00218460701282539

Cited by 167 publications

(180 citation statements)

References 37 publications

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“…This directional or anisotropic adhesive behaviour that allows smart or controllable surface attachment and detachment has inspired many applications such as climbing robots [7], clean transportation systems [8,9] and micro-transfer printing mechanisms [10]. Rapid switching of the gecko's toe pads between attachment and detachment can be attributed to millions of inclined seta shafts and to the corresponding loading response of the toes of the gecko [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Rectangle-capped and tilted micropillar array for enhanced anisotropic anti-shearing in biomimetic adhesion

Wang

Tian

et al. 2015

J. R. Soc. Interface.

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Dry adhesion observed in the feet of various small creatures has attracted considerable attention owing to the unique advantages such as self-cleaning, adaptability to rough surfaces along with repeatable and reversible adhesiveness. Among these advantages, for practical applications, proper detachability is critical for dry adhesives with artificial microstructures. In this study, we present a microstructured array consisting of both asymmetric rectangle-capped tip and tilted shafts, which produce an orthogonal anisotropy of the shearing strength along the long and short dimensions of the tip, with a maximum anti-shearing in the two directions along the longer dimension. Meanwhile, the tilt feature can enhance anisotropic shearing adhesion by increasing shearing strength in the forward shearing direction and decreasing strength in the reverse shearing direction along the short dimension of the tip, leading to a minimum antishearing in only one of the two directions along the shorter dimension of the rectangular tip. Such a microstructured adhesive with only one weak shearing direction, leading to well-controlled attachment and detachment of the adhesive, is created in our experiment by conventional double-sided exposure of a photoresist followed by a moulding process.

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Section: Introductionmentioning

confidence: 99%

Rectangle-capped and tilted micropillar array for enhanced anisotropic anti-shearing in biomimetic adhesion

Wang

Tian

et al. 2015

J. R. Soc. Interface.

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“…The apparent peel-zone can be observed intuitively in experiments, and has been discussed and analysed in several articles [17,30,32,36,45]. The shape of the apparent peel-zone can be calculated by the earliermentioned numerical method and is approximately equivalent to a circular shape as shown in figure 11c, which in accordance with the microscopic observation reported by Pesika et al [17]. However, it is difficult to observe the compression region of peel region, as there is only a slight deformation [46].…”

Section: Appendix B Discussion On the Numerical Methodsmentioning

confidence: 99%

“…The peel angle, the length and shape of the peel region of the adhesive tape can significantly influence its mechanical peeling properties [6,17,[30][31][32]. It is practicable to fabricate adhesive surfaces with specially designed micro-fibrillar structures to modulate their reversible peeling and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Design of gecko-inspired fibrillar surfaces with strong attachment and easy-removal properties: a numerical analysis of peel-zone

Zhou

Pesika

Zeng

et al. 2012

J. R. Soc. Interface.

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Despite successful fabrication of gecko-inspired fibrillar surfaces with strong adhesion forces, how to achieve an easy-removal property becomes a major concern that may restrict the wide applications of these bio-inspired surfaces. Research on how geckos detach rapidly has inspired the design of novel adhesive surfaces with strong and reversible adhesion capabilities, which relies on further fundamental understanding of the peeling mechanisms. Recent studies showed that the peel-zone plays an important role in the peeling off of adhesive tapes or fibrillar surfaces. In this study, a numerical method was developed to evaluate peel-zone deformation and the resulting mechanical behaviour due to the deformations of fibrillar surfaces detaching from a smooth rigid substrate. The effect of the geometrical parameters of pillars and the stiffness of backing layer on the peel-zone and peel strength, and the strong attachment and easyremoval properties have been analysed to establish a design map for bio-inspired fibrillar surfaces, which shows that the optimized strong attachment and easy-removal properties can vary by over three orders of magnitude. The adhesion and peeling design map established provides new insights into the design and development of novel gecko-inspired fibrillar surfaces.

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“…Their model can explain why the gecko needs up to 1000 spatulae at the setal termination, but it did not consider the friction effect. Tian et al [23], Chen et al [24] and Pesika et al [25] used the peel-zone model to analyse the influence of the peeling angle on the adhesive force. They suggested that the peeling angle of the spatula can be adjusted by the digital gripping (DG) and digital hyperextension (DH) of the gecko.…”

Section: Introductionmentioning

confidence: 99%

Mechanical analyses on the digital behaviour of the Tokay gecko ( Gekko gecko ) based on a multi-level directional adhesion model

Wang

Mei

et al. 2015

Proc. R. Soc. A.

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This paper proposes a multi-level hierarchical model for the Tokay gecko (Gekko gecko) adhesive system and analyses the digital behaviour of the G. gecko under macro/meso-level scale. The model describes the structures of G. gecko's adhesive system from the nano-level spatulae to the sub-millimetre-level lamella. The G. gecko's seta is modelled using inextensible fibril based on Euler's elastica theorem. Considering the side contact of the spatular pads of the seta on the flat and rigid substrate, the directional adhesion behaviour of the seta has been investigated. The lamella-induced attachment and detachment have been modelled to simulate the active digital hyperextension (DH) and the digital gripping (DG) phenomena. The results suggest that a tiny angular displacement within 0.25 • of the lamellar proximal end is necessary in which a fast transition from attachment to detachment or vice versa is induced. The active DH helps release the torque to induce setal non-sliding detachment, while the DG helps apply torque to make the setal adhesion stable. The lamella plays a key role in saving energy during detachment to adapt to its habitat and provides another adhesive function which differs from the friction-dependent setal adhesion system controlled by the dynamic of G. gecko's body.

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Peel-Zone Model of Tape Peeling Based on the Gecko Adhesive System

Cited by 167 publications

References 37 publications

Rectangle-capped and tilted micropillar array for enhanced anisotropic anti-shearing in biomimetic adhesion

Rectangle-capped and tilted micropillar array for enhanced anisotropic anti-shearing in biomimetic adhesion

Design of gecko-inspired fibrillar surfaces with strong attachment and easy-removal properties: a numerical analysis of peel-zone

Mechanical analyses on the digital behaviour of the Tokay gecko ( Gekko gecko ) based on a multi-level directional adhesion model

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