Floating Isogeometric Analysis

Helge C. Hille, Siddhant Kumar, Laura De Lorenzis*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

We propose Floating Isogeometric Analysis (FLIGA), which extends IGA to extreme deformation analysis. The method is based on a novel tensor-product construction of B-Splines for the update of the basis functions in one direction of the parametric space. With basis functions “floating” deformation-dependently in this direction, mesh distortion is overcome for problems in which extreme deformations occur predominantly along the associated (possibly curved) physical axis. In doing so, we preserve the numerical advantages of splines over many meshless basis functions, while avoiding remeshing. We employ material point integration for numerical quadrature, thus attributing a Lagrangian character to our technique. The paper introduces the method and reviews the fundamental properties of the FLIGA basis functions, including a numerical patch test. The performance of FLIGA is then numerically investigated on the benchmark of Newtonian and viscoelastic Taylor–Couette flow. Finally, we simulate a viscoelastic extrusion-based additive manufacturing process, which served as the original motivation for the new approach.

Original languageEnglish
Article number114684
Number of pages31
JournalComputer Methods in Applied Mechanics and Engineering
Volume392
DOIs
Publication statusPublished - 2022

Keywords

  • Additive manufacturing
  • Extreme deformations
  • Extrusion
  • Isogeometric analysis
  • Mesh distortion
  • Meshless methods

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