Prediction of displacement and stress fields of a notched panel with geometric nonlinearity by reduced order modeling

Ricardo Perez, X. Q. Wang, Marc Mignolet

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

The focus of this investigation is on a first assessment of the predictive capabilities of nonlinear geometric reduced order models for the prediction of the large displacement and stress fields of panels with localized geometric defects, the case of a notch serving to exemplify the analysis. It is first demonstrated that the reduced order model of the notched panel does indeed provide a close match of the displacement and stress fields obtained from full finite element analyses for moderately large static and dynamic responses (peak displacement of 2 and 4 thicknesses). As might be expected, the reduced order model of the virgin panel would also yield a close approximation of the displacement field but not of the stress one. These observations then lead to two "enrichment" techniques seeking to superpose the notch effects on the virgin panel stress field so that a reduced order model of the latter can be used. A very good prediction of the full finite element stresses, for both static and dynamic analyses, is achieved with both enrichments.

Original languageEnglish (US)
Pages (from-to)6572-6589
Number of pages18
JournalJournal of Sound and Vibration
Volume333
Issue number24
DOIs
StatePublished - Dec 2 2014

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Acoustics and Ultrasonics
  • Mechanical Engineering

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