Dear all,
In the analogue modelling lab of the Fault Dynamics Research group we use a dynamic ring shear tester to accurately analyze all friction-related parameters of granular materials like sand, ceramic and glass beads.
My question is how do you measure the non-friction material parameters in dry and wet cohesive granular materials similar to sugar cubes or powder cakes?
We consider to get an uni-axial shear tester to measure various non-friction material parameters (e.g. Young modulus, tensile strength, compressive strength, Poisson ratio, compressibility of cohesive granular materials).
Does anyone in the research community have experience with measuring these parameters in cohesive granular materials? Do you know simple techniques or DIY devices to do this in your lab without a dedicated uni-axial material tester?
Can you provide any helpful references providing a review or insights of these procedures?
Your help would be very much appreciated. Regards, Jürgen
Dear Jürgen,
we used a conventional ring shear tester RST-XS (Schulze, 2012) to measure the compressibility of certain analogue materials. A special type of shear cell is required to do this and it worked quiet well. In the manual, it is also written that measurements of elastic parameters are possible with this shear cell, but we haven’t tested this so far.
In Galland et al 2006 (Use of vegetable oil and silica powder for scale modelling of
magmatic intrusion in a deforming brittle crust) a selfmade apparatus to measure the tensile strengh is described.
I hope this may help you.
Best,
Michael
Hi Michael,
great pointers. I will check what can be done with our ring shear tester. I had a discusion with Dietmar Schulze earlier and remember there are some limitations but definitely a good lead. I will check the Galland paper because measurements of tensile strength seems to be the tricky one.
Thanks for the feedback, Jürgen
- Badges
- Science method
- Similar topics
- Methodology
- Crystallography
- X-ray Diffraction