Interaction and multiscale mechanics

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Convergence studies for Enriched Free Mesh Method and its application to fracture mechanics

  • Matsubara, Hitoshi (Department of Civil Engineering and Architecture, University of the Ryukyus) ;
  • Yagawa, Genki (Center for Computational Mechanics Research, Toyo University)
  • Received : 2009.08.10
  • Accepted : 2009.08.27
  • Published : 2009.09.25
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Abstract

The Enriched Free Mesh Method (EFMM) is a patch-wise procedure in which both a displacement field on an element and a stress/strain field on a cluster of elements connected to a node can be defined. On the other hand, the Superconvergent Patch Recovery (SPR) is known to be an efficient post-processing procedure of the finite element method to estimate the error norm at a node. In this paper, we discuss the relationship between solutions of the EFMM and those of the SPR through several convergence studies. In addition, in order to solve the demerit of the smoothing effect on the fracture mechanics fields, we implement a singular stress field to a local patch in the EFMM, and its effectiveness is investigated.

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References

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