Partition of unity-based discontinuous elements for interface phenomena: Computational issues. Simone, A. Communications in Numerical Methods in Engineering, 20(6):465--478, 2004.
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The performance of partition of unity-based discontinuous elements was studied by means of a numerical study. In particular, it was shown that conventional interface elements and partition of unity-based discontinuous elements share the same structure of the stiffness matrix governing interface behaviour and, under specific circumstances, the same shortcomings (i.e. oscillations in the traction profile). The effect of various integration schemes on the interface contribution was studied through the analysis of a linear-elastic notched beam. Further, an eigenvalue analysis of the partition of unity-based discontinuous element was conducted to gain more insight into its mechanical behaviour.
@article{ Simone:PoUIssues2004,
  author = {A. Simone},
  title = {Partition of unity-based discontinuous elements for interface phenomena: {C}omputational issues},
  journal = {Communications in Numerical Methods in Engineering},
  year = {2004},
  volume = {20},
  number = {6},
  pages = {465--478},
  kind = {journal paper (ISI)},
  doi = {http://dx.doi.org/10.1002/cnm.688},
  pdf = {J5 - Partition of unity-based discontinuous elements for interface phenomena, computational issues --
		  Simone - cnme - 2004.pdf},
  abstract = {The performance of partition of unity-based discontinuous elements was studied by means of a
		  numerical study. In particular, it was shown that conventional interface elements and partition of
		  unity-based discontinuous elements share the same structure of the stiffness matrix governing
		  interface behaviour and, under specific circumstances, the same shortcomings (i.e. oscillations in the
		  traction profile). The effect of various integration schemes on the interface contribution was studied
		  through the analysis of a linear-elastic notched beam. Further, an eigenvalue analysis of the
		  partition of unity-based discontinuous element was conducted to gain more insight into its mechanical
		  behaviour.}
}

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