Framework for predicting failure in polymeric unidirectional composites through combined experimental and computational mesoscale modeling techniques

Bilal Khaled, Loukham Shyamsunder, Josh Robbins, Yatin Parakhiya, Subramaniam Rajan

Research output: Contribution to journalArticlepeer-review

Abstract

As composites continue to be increasingly used, finite element material models that homogenize the composite response become the only logical choice as not only modeling the entire composite microstructure is computationally expensive but obtaining the entire suite of experimental data to characterize deformation and failure may not be possible. The focus of this paper is the development of a modeling framework where plasticity, damage, and failure-related experimental data are obtained for each composite constituent. Mesoscale finite elements models consisting of multiple repeating unit cells are then generated and used to represent a typical carbon fiber/epoxy resin unidirectional composite to generate the complete principal direction stress-strain curves. These models are subjected to various uniaxial states of stress and compared with experimental data. They demonstrate a reasonable match and provide the basic framework to completely define the composite homogenized material model that can be used as a vehicle for failure predictions.

Original languageEnglish (US)
Article number50
JournalFibers
Volume9
Issue number8
DOIs
StatePublished - Aug 2021

Keywords

  • Finite element analysis
  • Mechanical testing
  • Polymer-matrix composites
  • Strength

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering
  • Biomaterials
  • Mechanics of Materials

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