Stress-adapted numerical form finding of pre-stressed surfaces by the updated reference strategy

R. Wüchner, K. U. Bletzinger

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

In this paper we present the updated reference strategy for numerical form finding of pre-stressed membranes, which is based on standard finite element discretization. The singularities of the inverse problem are regularized by a homotopy mapping. A projection scheme is proposed where anisotropic pre-stress is defined with respect to an additional reference plane, which reflects the initially developable surface of membrane strips in the production process. Physically problematic combinations of edge geometry and surface stress are solved by a self-adaptive stress correction scheme. The algorithm is based on a local criterion derived from differential geometry. Several examples illustrate the success of each idea and implementation.

Original languageEnglish
Pages (from-to)143-166
Number of pages24
JournalInternational Journal for Numerical Methods in Engineering
Volume64
Issue number2
DOIs
StatePublished - 14 Sep 2005

Keywords

  • Anisotropic pre-stress
  • Form finding
  • Membrane structures
  • Minimal surface
  • Pre-stress adaption
  • Updated reference strategy

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