The experimental results were obtained using a straight
split bottom cell (see picture). The internal cross section had
dimensions of
4.2 cm x 4.5 cm. The shear cell included two 60 cm long L shaped
sliders, one of which was slowly translated in experiments with total
displacement between 5 and 6 cm. The internal walls of the sliders
were covered by sandpaper to prohibit slip at the walls.
Here the cell is filled with corundum doped with poppy seeds (tracers).
The cell is
not filled until the end sothat during translation the material is not
pushed by the end walls. Translation is obtained by the slow rotation
of the screws.
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Picture of
the
experimental setup:
(click on the image to
magnify)
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