Full-field deformation characteristics of anisotropic marble under
compression revealed by 3D digital image correlation
Abstract
This work aims to reveal the anisotropic full-field displacemnet and the
progressive failure behaviors of interbedded marble under uniaxial
compression using three dimensional digital image correlation (3D DIC)
technique. The effects of the interbed orientation on the field
displacement and strain pattern and the crack evolution were analyzed
qualitatively and quantitatively. Testing results show that different
stress strain responses can be generated depending on the interbed
orientation, and the interbeds influence the localized deformation and
high strain concentration pattern. The field displacement evolution
curves present different pattern and are impacted by the localized
deformation. In addition, the strain localization takes places
progressively and develops at a lower rate for rock with 0° and 90°
interbed than those of 30° and 60° interbed rock. The quick
shear-sliding along the interbed leads to the minimum strength of rock
having 30° interbed orientation. It is suggested that rock anisotropic
field deformation is structure depended.