Photoelastic and photographic study of a granular material

摘要: Glass ballotini can be used as a special granular material that reveals information about stress conditions when viewed using polarised light. Simultaneously, techniques for observing displacement fields to produce internal strains. The combination of photoelastic and photographic observation has potential extending knowledge in two-dimensional samples material. procedures described this note indicate some interesting possibilities experimental soil mechanics. use digital photography with light permits incremental results obtained from the images. non-polarised particle image velocimetry analysis gives opportunity obtain strain great accuracy local detail. standard processing graphics software precise comparison features fields...