Contact Between Biological Attachment Devices and Rough Surfaces

Filippov, Alexander É.; Gorb, Stanislav N.

doi:10.1007/978-3-030-41528-0_4

Cited by 3 publications

(2 citation statements)

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“…When the prototype Seta-I comes into contacted with a rough surface with a roughness radius of 30 nm, the bottom surface of the spatula discretely contacts each asperity [42], as shown in figure 8a. As a consequence, positive pressure is primarily concentrated at the top of every asperity.…”

Section: Contact Between the Seta And The Rough Surface With An Asper...mentioning

confidence: 99%

Interaction of a non-axisymmetric artificial single spatula with rough surfaces

Cheng,

Jiang,

Borodich

et al. 2024

Interface Focus.

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Hair-like attachment structures are frequently used by animals to create stable contact with rough surfaces. Previous studies focused primarily on axisymmetric biomimetic models of artificial spatulas, such as those with a mushroom-shaped and cylinder-shaped geometry, in order to simulate the so-called gecko effect. Here, two geometric prototypes of artificial adhesive structures with non-axisymmetric properties were designed. The investigation of the prototype’s interactions with rough surfaces was carried out using the finite element software ABAQUS. Under increasing vertical displacement, the effect of asperity size on the contact pressure evolution of the spatula was investigated. It has been demonstrated that the contact behaviour is greatly affected by the flexibility of the spatula, which is caused by its variable thickness. The thinner spatula shows a higher nominal contact area and attaches more strongly to various rough surfaces. Although a thicker spatula is more susceptible to the ‘leverage’ phenomenon, which occurs when excessively applied displacements prematurely reduce the nominal contact area, it obtains the ability to regulate attachment during unidirectional loading. Two non-axisymmetric prototypes provide different design concepts for the artificial adhesives. It is hoped that this study will provide fresh viewpoints and innovations that contribute to the development of biologically inspired adhesives.

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Section: Contact Between the Seta And The Rough Surface With An Asper...mentioning

confidence: 99%

Interaction of a non-axisymmetric artificial single spatula with rough surfaces

Cheng,

Jiang,

Borodich

et al. 2024

Interface Focus.

View full text Add to dashboard Cite

show abstract

“…A number of creatures, from small insects such as ants and cockroaches to large animals such as cats and eagles, are able to attach themselves to the rough walls through their claws. They realize attachment by interlocking between their microspines at their claw ends and the rough peak on the rough surface [ 1 , 2 , 3 , 4 , 5 , 6 ]. Dai et al [ 7 ] studied the tangential attachment behavior between the claws of the free-walking beetle and sandpaper, with emphasis on the relationship between the dimension of the claw tip and the asperity Attachment by spine/surface interlocking shows excellent adaptability to dusty, rough surfaces, which are common in nature and the human living environment.…”

Section: Introductionmentioning

confidence: 99%

An Underactuated Adaptive Microspines Gripper for Rough Wall

Chen

et al. 2023

Biomimetics

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Wall attachment has great potential in a broad range of applications such as robotic grasping, transfer printing, and asteroid sampling. Herein, a new type of underactuated bionic microspines gripper is proposed to attach to an irregular, rough wall. Experimental results revealed that the gripper, profiting from its flexible structure and underactuated linkage mechanism, is capable of adapting submillimeter scale roughness to centimeter scale geometry irregularity in both normal and tangential attachment. The rigid-flexible coupling simulation analysis validated that the rough adaptation was achieved by the passive deformation of the zigzag flexible structure, while the centimeter-scale irregularity adaptation come from the underactuated design. The attachment test of a spine confirmed that a 5 mm sliding distance of the spine tip on the fine brick wall promises a saturated tangential attachment force, which can guide the stiffness design of flexible structure and parameter selection of underactuated linkage. Furthermore, the developed microspines gripper was successfully demonstrated to grasp irregular rocks, tree trunks, and granite plates. This work presents a generally applicable and dexterous passive adaption design to achieve rough wall attachment for flat and curved objects, which promotes the understanding and application of wall attachment.

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