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@ARTICLE{Hu:904560,
      author       = {Hu, Jianqiao and Song, Hengxu and Sandfeld, Stefan and Liu,
                      Xiaoming and Wei, Yueguang},
      title        = {{M}ultiscale study of the dynamic friction coefficient due
                      to asperity plowing},
      journal      = {Friction},
      volume       = {9},
      number       = {4},
      issn         = {2223-7690},
      address      = {Heidelberg},
      publisher    = {Springer},
      reportid     = {FZJ-2021-06130},
      pages        = {822 - 839},
      year         = {2021},
      abstract     = {A macroscopically nominal flat surface is rough at the
                      nanoscale level and consists of nanoasperities. Therefore,
                      the frictional properties of the macroscale-level rough
                      surface are determined by the mechanical behaviors of
                      nanoasperity contact pairs under shear. In this work, we
                      first used molecular dynamics simulations to study the
                      non-adhesive shear between single contact pairs.
                      Subsequently, to estimate the friction coefficient of rough
                      surfaces, we implemented the frictional behavior of a single
                      contact pair into a Greenwood-Williamson-type statistical
                      model. By employing the present multiscale approach, we used
                      the size, rate, and orientation effects, which originated
                      from nanoscale dislocation plasticity, to determine the
                      dependence of the macroscale friction coefficient on system
                      parameters, such as the surface roughness, separation,
                      loading velocity, and direction. Our model predicts an
                      unconventional dependence of the friction coefficient on the
                      normal contact load, which has been observed in nanoscale
                      frictional tests. Therefore, this model represents one step
                      toward understanding some of the relevant macroscopic
                      phenomena of surface friction at the nanoscale level.},
      cin          = {IAS-9},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IAS-9-20201008},
      pnm          = {5111 - Domain-Specific Simulation $\&$ Data Life Cycle Labs
                      (SDLs) and Research Groups (POF4-511) / MuDiLingo - A
                      Multiscale Dislocation Language for Data-Driven Materials
                      Science (759419)},
      pid          = {G:(DE-HGF)POF4-5111 / G:(EU-Grant)759419},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000595394000007},
      doi          = {10.1007/s40544-020-0438-4},
      url          = {https://juser.fz-juelich.de/record/904560},
}