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Adhesion tunable bio-inspired dry adhesives by twisting

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Abstract

We report on a control method by twisting the adhesion property of a bio-inspired dry adhesive with mushroom-shaped micro structures. The fabricated artificial dry adhesive has a strong adhesive force in all directions; however, this adhesive is considerably strong to detach simply for reversible usages. This study proposes twisting a mushroom-shaped artificial dry adhesive for easy a detachment method that makes a pull-off force decrease from 14 N/cm 2 to nearly 0. In addition, the optimal process parameters of the twisting detachment are studied by experimentally comparing the pull-off force, net torque, and required time depending on the thickness of the adhesive and angular velocity of twisting. Result indicates that thin adhesive (1.2 mm) and high angular velocity (0.0436 rad/s) provide a good detachment performance. For the feasible application of the proposed method, a glass transportation robot was used for demonstration and a glass substrate was transported several times.

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Abbreviations

F z :

adhesion force of the gecko-inspired dry adhesives

M z :

net torque of a motor that induces the twisting of the gecko-inspired dry adhesives

t DT :

required time for the detachment of the gecko-inspired dry adhesives from the substrates

P :

power of a motor that induces the twisting of the gecko-inspired dry adhesives

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Author notes

  1. Oh Hyun Kang and Sung Ho Lee contributed equally to this work

Authors and Affiliations

  1. School of Mechanical Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566, South Korea

    Oh Hyun Kang, Sung Ho Lee, Jung Hwan Yun, Hak Yi, Moon Kyu Kwak & Sang Ryong Lee

  2. Research Center, Ncoretechnology Co., Ltd., 80, Daehak-ro, Buk-gu, Daegu, 41566, South Korea

    Moon Kyu Kwak

Authors
  1. Oh Hyun Kang
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  2. Sung Ho Lee
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  3. Jung Hwan Yun
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  5. Moon Kyu Kwak
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Correspondence to Moon Kyu Kwak or Sang Ryong Lee.

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Kang, O.H., Lee, S.H., Yun, J.H. et al. Adhesion tunable bio-inspired dry adhesives by twisting. Int. J. Precis. Eng. Manuf. 18, 1433–1437 (2017). https://doi.org/10.1007/s12541-017-0171-8

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