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@ARTICLE{Persson:860478,
      author       = {Persson, Bo and Scaraggi, M.},
      title        = {{S}ome {C}omments on {H}ydrogel and {C}artilage {C}ontact
                      {M}echanics and {F}riction},
      journal      = {Tribology letters},
      volume       = {66},
      number       = {1},
      issn         = {1573-2711},
      address      = {Dordrecht},
      publisher    = {Springer Science Business Media B.V.},
      reportid     = {FZJ-2019-01232},
      pages        = {23},
      year         = {2018},
      abstract     = {We discuss the origin of the low friction observed for some
                      elastically soft materials, such as hydrogels and the human
                      cartilage. When a soft elastic solid is squeezed against
                      another solid in a fluid, if the nominal contact pressure is
                      high enough, after long enough contact time the contact area
                      percolates, resulting in islands of confined fluid. For
                      charged surfaces, with charges of equal sign, the osmotic
                      pressure in the area of “real contact” may be large
                      enough to keep the surfaces separated at nanometer
                      separation. In this case the solid contact pressure (here
                      the osmotic pressure) in the area of “real contact” will
                      be nearly independent of the external load. The finite
                      surface separation in the area of “real contact” results
                      in a very small (breakloose) friction force even after long
                      time of stationary contact},
      cin          = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC},
      ddc          = {670},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
                      $I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
      pnm          = {141 - Controlling Electron Charge-Based Phenomena
                      (POF3-141)},
      pid          = {G:(DE-HGF)POF3-141},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000426475600035},
      doi          = {10.1007/s11249-017-0973-y},
      url          = {https://juser.fz-juelich.de/record/860478},
}