Digital Image Correlation to Evaluate Shear Banding in Dilative Sands

Amy L. Rechenmacher*, Richard J. Finno

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

125 Scopus citations

Abstract

Experimental results are presented of plane strain compression experiments on dense sands, in which the technique of Digital Image Correlation (DIC) was used to quantify localized displacements. The technique is described in detail. Results of accuracy tests of the DIC technique indicated that localized displacements were measured to an accuracy of ±0.008 mm. Typical DIC analyses produced approximately 250 displacement points within a shear band, which served as input for regression-based strain computation, yielding highly accurate volumetric strain data for determining evolutions to critical state. Displacement data also were used to investigate volume changes outside the shear band. The DIC technique also enabled measurement of shear band inclination and thickness throughout the deformation process.

Original languageEnglish (US)
Pages (from-to)13-22
Number of pages10
JournalGeotechnical Testing Journal
Volume27
Issue number1
DOIs
StatePublished - Jan 2004

Keywords

  • Critical state
  • Digital Image Correlation
  • Dilative sand
  • Local displacements
  • Plane strain
  • Shear band
  • Volumetric exchange

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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