Greetings I am entirely new to soil modelling. I want to undertake a thesis on soil modelling. Currently I’ve basic understanding of soil mechanics which is taught at undergraduate level. […]
Dear all, I tried to find some oedometer tests result on Ticino sand in different relative densities. However, I couldn’t find any database related to this type of experiment. I […]
Dear all, I am trying to calibrate the hypoplastic parameters for the hypo sand model with ExCalibre tool, using CID for a particular sand. The moment I try to load […]
Hi,
a couple of hints:
Axissymmetric
Horizontally constrained at the sides
Vertically constrained at the bottom
Mesh as coarse as possible (2 Elements)
Vertical load on the top (varies with each load step)
For the output select a Gauss point in one of the 2 elements and display vertical strain vs vertical stress
You shouldn’t have any problems
Hi, I was also modelling oedometer test using Plaxis and did what you have mentioned. I am wondering how Plaxis is taking initial void ratio into account and is it possible to obtain the void ratio variation from the output or it should be calculated indirectly from the resultant strains? my goal is to obtain void ratio versus the vertical stress curve.
Hi,
The vertical strain in an Oedometer test is equal the volumetric strain, and using the simple soil mechanics relationships you can calculate the changes in void ratio or porosity.
I am not sure if Plaxis can do this automatically (I doubt it) but then you have to check this on your own.
Hi,
a couple of hints:
Axissymmetric
Horizontally constrained at the sides
Vertically constrained at the bottom
Mesh as coarse as possible (2 Elements)
Vertical load on the top (varies with each load step)
For the output select a Gauss point in one of the 2 elements and display vertical strain vs vertical stress
You shouldn’t have any problems
Hi, I was also modelling oedometer test using Plaxis and did what you have mentioned. I am wondering how Plaxis is taking initial void ratio into account and is it possible to obtain the void ratio variation from the output or it should be calculated indirectly from the resultant strains? my goal is to obtain void ratio versus the vertical stress curve.
Hello, I’m trying the same simulation on Abaqus, how can I define steps to simulate unload-reload loops? thank you
Hi,
The vertical strain in an Oedometer test is equal the volumetric strain, and using the simple soil mechanics relationships you can calculate the changes in void ratio or porosity.
I am not sure if Plaxis can do this automatically (I doubt it) but then you have to check this on your own.
Regards,
Thank you so much!
Which material model is the best for modelling stiff clays ?
You can use either hardening soil model, or soft soil and to model the creep behavior, soft soil creep model can also be used