A multiscale experimental approach for correlating global and local deformation response in woven composites

Behrad Koohbor, Suraj Ravindran, Addis Kidane

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

A multiscale experimental approach is introduced that facilitates correlating globally applied stress to the local material response at yarn scale. Using a high-resolution optical digital image correlation, low and high strain zones in off-axis woven composite samples loaded in uniaxial tension are identified and the corresponding full-field strains are quantified. The local strain response quantified over low and high strain domains are used along with the continuum scale deformation to establish a correlation between global and local deformation behavior as a function of fiber orientation. In addition, global stress-local strain curves are extracted for low and high strain domains at different fiber orientation angles. A simple plasticity model in conjunction with the obtained stress-strain curves is implemented and utilized to develop a phenomenological model that enables correlating global stress with the locally developed strain at different locations in a composite specimen subjected to off-axis tensile load.

Original languageEnglish (US)
Pages (from-to)328-334
Number of pages7
JournalComposite Structures
Volume194
DOIs
StatePublished - Jun 15 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Civil and Structural Engineering

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