Microplane model for stiff foams and finite element analysis of sandwich failure by core indentation

Michele Brocca, Zdenek P Bazant*, Isaac M Daniel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Composite sandwich plates and shells are gaining increasing popularity in engineering practice, due to their high stiffness-to-weight ratio, low thermal conductivity and energy absorption characteristics. Modeling of the structural response of a sandwich member requires knowledge of the mechanical behavior of the materials used for the facings and the core. The paper presents a new constitutive model for closed-cell cellular materials, developed with the microplane approach. The model is then employed in a finite element analysis of three point bending tests of sandwich beams failing by core indentation. Good agreement of the numerical results with the experimental observations is achieved. This proves the new model to be capable of satisfactorily reproducing the mechanical response of cellular materials.

Original languageEnglish (US)
Pages (from-to)8111-8132
Number of pages22
JournalInternational Journal of Solids and Structures
Volume38
Issue number44-45
DOIs
StatePublished - Oct 12 2001

Keywords

  • Cellular materials
  • Composites
  • Finite-element analysis
  • Foams
  • Sandwich plates

ASJC Scopus subject areas

  • Modeling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

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