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Granular rheology: measuring boundary forces with laser-cut leaf springs.
- Source :
- EPJ Web of Conferences; 2017, Vol. 140, p1-4, 4p, 2 Color Photographs, 1 Black and White Photograph, 2 Graphs
- Publication Year :
- 2017
-
Abstract
- In granular physics experiments, it is a persistent challenge to obtain the boundary stress measurements necessary to provide full a rheological characterization of the dynamics. Here, we describe a new technique by which the outer boundary of a 2D Couette cell both confines the granular material and provides spatially- and temporally- resolved stress measurements. This key advance is enabled by desktop laser-cutting technology, which allows us to design and cut linearly-deformable walls with a specified spring constant. By tracking the position of each segment of the wall, we measure both the normal and tangential stress throughout the experiment. This permits us to calculate the amount of shear stress provided by basal friction, and thereby determine accurate values of μ(I). [ABSTRACT FROM AUTHOR]
- Subjects :
- GRANULAR materials
RHEOLOGY
STRESS measurement (Mechanics)
COUETTE flow
FRICTION
Subjects
Details
- Language :
- English
- ISSN :
- 21016275
- Volume :
- 140
- Database :
- Complementary Index
- Journal :
- EPJ Web of Conferences
- Publication Type :
- Conference
- Accession number :
- 124019474
- Full Text :
- https://doi.org/10.1051/epjconf/201714003035