An allgorithm for mesh rezoning with application to strain localization problems

This paper describes an algorithm for automatic rezoning of the finite element mesh, which can be used in adaptivity techniques where the initial topology is conserved. Difficulties like the definition of an adequate mesh density, its continued interpolation and the description of curved boundaries have been overcome successfully. The algorithm has been used in some strain localization problems. The output of a first analysis with a coarse, constant density mesh is used as an indicator to control the mesh spacing in a subsequent calculation, leading to an improved solution. The improvement of the solution upon remeshing is shown

Computational strategies for composite structures

Civil Engineering and Geoscience

On the numerical integration of interface elements

Eigenmode analyses of the element stiffness matrices have been used to assess the impact of the applied integration scheme on the stress predictions of two- and three-dimensional plane interface elements. It is demonstrated that large stress gradients over the element and coupling of the individual node-sets of the interface element may result in an oscillatory type of response. For line elements and linear plane interface elements the performance can be improved by using either a nodal lumping scheme or Newton-Cotes or Lobatto integration schemes instead of the more traditional Gauss scheme. For quadratic interface elements the same holds true except for a nodal lumping scheme