Transient analysis of nonlinear locally resonant metamaterials via computational homogenization

Tim van Nuland, Priscilla Brandão Silva, Ashwin Sridhar, Marc Geers, Varvara Kouznetsova (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
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Abstract

In this paper, the transient computational homogenization scheme is extended to allow for nonlinear elastodynamic phenomena. The framework is used to analyze wave propagation in a locally resonant metamaterial containing hyperelastic rubber-coated inclusions. The ability to properly simulate realistic nonlinearities in elasto-acoustic metamaterials constitutes a step forward in metamaterial design as, so far, the literature has focused only on academic nonlinear material models and simple lattice structures. The accuracy and efficiency of the framework are assessed by comparing the results with direct numerical simulations for transient dynamic analysis. It is found that the band gap features are adequately captured. The ability of the framework to perform accurate nonlinear transient dynamic analyses of finite-size structures
is also demonstrated, along with the significant computational time savings achieved.
Original languageEnglish
Pages (from-to)3136–3155
Number of pages20
JournalMathematics and Mechanics of Solids
Volume24
Issue number10
DOIs
Publication statusPublished - 1 Oct 2019

Keywords

  • Computational homogenization
  • hyperelastic materials
  • local resonance
  • metamaterials
  • nonlinear dynamics

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