Remeshing techniques for r-adaptive and combined h/r-adaptive analysis with application to 2D/3D crack propagation

H. Askes , L.J. Sluys , B.B.C. de Jong (Netherlands)

Abstract

Remeshing strategies are formulated for r-adaptive and h/r-adaptive analysis of crack propaga-tion.The relocation of the nodes, which typifies r-adaptivity, is a very cheap method to optimise a givendiscretisation since the element connectivity remains unaltered. However, the applicability is limited. Tofurther improve the finite element mesh, a combined h/r-adaptive method is proposed in which h-adaptivityis applied whenever r-adaptivity is not capable of further improving the discretisation. Two andthree-dimensional examples are presented. It is shown that the r-adaptive approach can optimise adiscretisation at minimal computational costs. Further, the combined h/r-adaptive approach improves theperformance of a fully r-adaptive technique while the number of h-remeshings is reduced compared to afully h-adaptive technique.

Key Words

adaptivity; remeshing; ALE; crack propagation; failure analysis; localisation.

Address

H. Askes and L.J. Sluys, Faculty of Civil Engineering and Geosciences, Koiter Institute Delft, Delft University of Technology, P.O. Box 5048, 2600 GA Delft, The NetherlandsB.B.C. de Jong, TNO Building and Construction Research, P.O. Box 49, 2600 AA Delft, The Netherlands

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