Meso-scale study of non-linear tensile response and fiber trellising mechanisms in woven composites

Behrad Koohbor, Suraj Ravindran, Addis Kidane

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


The non-linear deformation response of plain woven carbon fiber-reinforced composites is experimentally studied at meso-scales. Stereovision digital image correlation is utilized to capture the full-field strain distribution over a 10 × 10 mm2 area of interest located at the center of the specimens. The evolution of local strains on the fiber bundles and matrix-rich regions as a function of loading is extracted. The effect of fiber orientation angle on fiber bundles stretch ratio and their angle of rotation (fiber trellising) and the related underlying failure mechanisms are analyzed using the measured full-field displacement data. The results indicate that the local load-bearing mechanisms are different in on-axis and off-axis loading conditions, whereas the larger global failure strain noticed in off-axis conditions is attributed to the occurrence of fiber rotation. The fiber trellising is also shown to promote high local shear strain and consequently leads to the protrusion of the matrix material on the deformed specimen surface.

Original languageEnglish (US)
Pages (from-to)986-995
Number of pages10
JournalJournal of Reinforced Plastics and Composites
Issue number12
StatePublished - Jun 1 2016
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2016 The Author(s).


  • Carbon fiber
  • digital image correlation
  • mechanical properties
  • meso-scale


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