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IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints


IASS Symposium 2014

SESSION: General 9: Computational Tools, Shape Finding and Optimization

Numerical simulation of burst-test of an ETFE membrane

< Table of Contents for General 9: Computational Tools, Shape Finding and Optimization
  • Proceedings Name: IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints
  • ISSN: (Electronic Version) 2518-6582
  • Session: General 9: Computational Tools, Shape Finding and Optimization
  • Title: Numerical simulation of burst-test of an ETFE membrane
  • Author(s): Marianna COELHO, Deane ROEHL, Kai-Uwe BLETZINGER
  • Keywords: inflated membranes, membrane materials, finite element method, NURBS surfaces
Abstract
This work presents a numerical model for the simulation of the behavior of pneumatic structures made of ETFE material. The model is applied to the simulation of a Burst-test for which experimental measurements are available. In the experiment, samples of ETFE-foil were fixed in a bubble inflation test device between an aluminium plate and an aluminium ring. Air was injected between the plate and the foil, resulting in a spherical deformed configuration. This test is modeled with finite elements and the numerical models are compared to experimental results. The elastoplastic material model with von Mises yield criteria is considered in the numerical analysis. Small strain and large strain were adopted for comparison. The results obtained with the numerical analysis with large strains are in accordance with the experimental results. On the other hand the results of the numerical analysis with small strains are valid only in the first steps of the analysis. These results reinforce the importance of considering a material model with large strains to model this type of material and suggest the use of von Mises plasticity for ETFE-foils.

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