Characterization of Shear and Compaction Bands in Sandstone Using X‐Ray Tomography and 3D Digital Image Correlation

This chapter employs x-ray tomography, 3D digital image analysis and 3D volumetric digital image correlation (3D-DIC) techniques to characterize localized deformation phenomena in sandstone. It presents the results obtained by x-ray tomography and 3D-DIC, using both High Resolution (HR) and Low Resolution (LR) x-ray images. The materials studied are porous sandstones that have been deformed under triaxial compression. The two full field techniques (x-ray CT and 3D-DIC) are first presented followed by a brief description of the experimental program. Subsequently a few selected results are provided for three sandstone specimens that have been deformed at different confining pressures. Controlled Vocabulary Terms compaction; computerised tomography; correlation methods; sand; X-ray imaging