Variationally consistent isogeometric analysis of trimmed thin shells at finite deformations, based on the STEP exchange format

Yujie Guo, Jason Heller, Thomas J.R. Hughes, Martin Ruess, Dominik Schillinger

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Following a series of recent innovations, isogeometric shell analysis based on trimmed CAD surfaces is currently being developed into an accurate, efficient and mature design-through-analysis methodology. This work contributes to this emerging technology with respect to the following aspects. On the analysis side, we present a robust variationally consistent Nitsche-type formulation for thin shells at large deformations that weakly enforces coupling constraints at trimming curves. On the geometry side, we present a set of algorithms that enable automatic interaction of trimmed shell analysis with CAD data structures based on the STEP exchange format. We integrate these methodologies in a comprehensive framework for isogeometric trimmed shell analysis. We demonstrate that our framework is able to seamlessly perform large-deformation stress analysis of an industry-scale 76-patch surface model of a Dodge RAM hood, while delivering comparable accuracy with respect to Simulia's commercial software package Abaqus.

Original languageEnglish (US)
Pages (from-to)39-79
Number of pages41
JournalComputer Methods in Applied Mechanics and Engineering
Volume336
DOIs
StatePublished - Jul 1 2018

Keywords

  • Abaqus
  • Isogeometric analysis
  • Kirchhoff–Love shells
  • STEP exchange format
  • Trimmed shell surfaces
  • Weakly enforced interface constraints

Fingerprint Dive into the research topics of 'Variationally consistent isogeometric analysis of trimmed thin shells at finite deformations, based on the STEP exchange format'. Together they form a unique fingerprint.

Cite this