Development of Capabilities of Optical Diffraction Analysis for Quantitatively Comparing and Correlating Rock Fabrics and Fabric Changes
Abstract
Fabrics of rock specimens undergoing deformation have been recorded photographically in white light, in ultra-violet illumination after treatment of specimens with fluorescent dye penetrants, and with acetate peels. These fabric pictures have been converted to their two-dimensional Fourier amplitude transforms by optical diffraction. Changes in the transforms reflect spatial changes in the fabrics, and are examined for possible relations to loading curve characteristics. Transforms have been produced from petrographic thin sections using a modified laboratory microscope and partially coherent light. Experimental results shown changes in crack width and frequency, with loading. This suggests some possibilities for in situ optical monitoring of microfracturing in active excavations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 21, 1972
- Accession Number
- AD0748339
Entities
People
- Howard J. Pincus
Organizations
- University of Wisconsin–Milwaukee