Direct measurement of shear stress and shear strain in soil: Application to physical models
Direct measurement of shear stress and shear strain in soil: Application to physical models
The ability to directly measure shear stresses and shear strains within a soil/particulate media may be essential in the interpretation of results from physical modelling in that they reveal what is happening within the soil as the model undergoes loading/deformation. In recent years significant effort has been placed in the application of PIV techniques, however, there are questions about how informative these surface measurements may be with respect to conditions away from the viewing location. The capability to directly measure shear stress and shear strain within a soil mass has been developed and has proven to be effective. Shear stress can be measured with a resolution of better than 0.05 kPa to a full scale of 250 kPa and shear strain to resolution of 10-5 (abs) over a full scale of ±15o. The measurement tools are described, and their effectiveness illustrated through the results and observations from of a series of cyclic simple shear tests performed on large diameter specimens of sand. Outcomes from 1g tilt table testing, measurement of shear stress and strain around an advancing cone and measurement of free field shear stress and shear strain during centrifuge shake table testing will be presented and discussed within the framework of physical models in GeoMechanics.
Mark Talesnick
4th Asia-Pacific Conference on Physical Modelling in Geotechnics (ACPMG2024)
Other
https://doi.org/10.53243/ACPMG2024-65
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