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      • Department of Mechanical Engineering
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      On effective behavior of microstructures embedding general interfaces with damage

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      Author(s)
      Saeb, S.
      Steinmann, P.
      Javili, Ali
      Date
      2019-05
      Source Title
      Computational Mechanics
      Print ISSN
      0178-7675
      Electronic ISSN
      1432-0924
      Publisher
      Springer
      Volume
      64
      Issue
      6
      Pages
      1473 - 1494
      Language
      English
      Type
      Article
      Item Usage Stats
      144
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      192
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      Abstract
      The interface between constituents of a multiphase material exhibits properties different from those of the bulk and can lead to major alternation of the material response. Interface effects are particularly important for multiphase nano-materials where the area-to-volume ratio is significantly large. In this contribution, we study the influence of a degrading general interface. That is, we allow for the initiation and accumulation of damage on a generalized interface accounting for both jumps of the displacement and the traction across the interface. The applicability of the proposed framework is demonstrated through several numerical examples. We present a parametric study on the influence of a broad range of interface material parameters on the overall behavior of various microstructures subject to volumetric loading and unloading. The numerical results illustrate that the resistance along the interface plays a key role in the resulting damage mechanism and could potentially prevent the detachment of the inclusion from the matrix regardless of the resistance across the interface or bulk material parameters. This behavior is observed and shown for both two- and three-dimensional examples. Moreover, the size-effect due to the general interface model is examined and compared against other interface models. Finally, the influence of the boundary conditions on the effective response and damage initiation of several microstructures is studied.
      Keywords
      Computational homogenization
      Finite deformation
      Elastic interface
      Cohesive interface
      General interface
      Permalink
      http://hdl.handle.net/11693/53442
      Published Version (Please cite this version)
      https://dx.doi.org/10.1007/s00466-019-01727-x
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