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Adhesion and Anisotropic Friction Enhancements of Angled Heterogeneous Micro-Fiber Arrays with Spherical and Spatula Tips

 

Journal of Adhesion Science and Technology

M.P. Murphy, Burak Aksak, and Metin Sitti

2007

Abstract


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@article{aksak-jast07,
  author = {Murphy, M.P. and Aksak, Burak and Sitti, Metin},
  title = {Adhesion and Anisotropic Friction Enhancements of Angled
     Heterogeneous Micro-Fiber Arrays with Spherical and Spatula
     Tips},
  journal = {Journal of Adhesion Science and Technology},
  venue = {Journal of Adhesion Science and Technology},
  year = {2007},
  institution = {NanoRobotics Laboratory, Department of Mechanical
     Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania
     15213},
  abstract = {Angled polyurethane fiber arrays are modified by adding
     soft spherical and spatula shaped tips by dipping. These fibers
     are characterized for adhesion and friction and compared with
     unmodified fibers and flat material samples. Sphere and spatula
     tip fiber samples demonstrate increased adhesion, with 10 and 23
     times the maximum adhesion of the unmodified fiber sample,
     respectively. The sphere and spatula tip fiber samples also show
     increased friction, with 1.6 and 4.7 times the maximum friction
     of the unmodified fiber sample, respectively. Simultaneous
     friction and adhesion is observed in a synthetic dry angled
     fibrillar adhesive sample (spatula tip fiber sample) for the
     first time. The direction dependent friction of angled fibers is
     investigated and observed. The adhesion and friction results
     reported in this paper suggest that fibers with negligible
     adhesion can be modified to exhibit significant adhesion and
     friction enhancement by the proposed fiber tip modifications.},
  keywords = {Gecko, Adhesion, Angled Fiber Array, Friction, Dry
     Adhesive, Bioinspired adhesive},
  url = {http://www.cs.cmu.edu/~claytronics/papers/aksak-jast07.pdf},
}

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