I am trying use sanisand subroutine posted in this website.
But it is not working. Getting no values for field variable in the odb.
I think i am missing something. Can anybody help.
Subroutine of SANISAND model
Related Articles
-
Spurious oscillations in calculated accelerations
Piotr Kowalczyk||Constitutive Modelling|2 |
Views 272
Hello everyone, I have just a general question how people approach the problem of spurious oscillations generated in dynamic analysis when using nonlinear soil constitutive models. I understand sometimes numerical […] -
Sanisand model
sahar saab||Constitutive Modelling|1 |
Views 329
Is the Sanisand constitutive model 3 dimensional? Could it be used for dry sand cases using C4D8 elements? (drained sand) Is it possible to apply it in a dynamic implicit […] -
ERROR Message when using UMAT_hcea with ABAQUS
Lukas Reindl||Constitutive Modelling|3 |
Views 514
Hi all! I am modelling some triaxial compressions in ABAQUS with Weald Clay. The constitutive law i am using is the clay hypoplasticity by Mašín. When running the program using […] -
Hypoplastic model for Granular soil
Naveen Meena||Constitutive Modelling|5 |
Views 690
Hello everyone, Could you please anyone tell me that how I can define the hypoplastic constitutive model for granular soil in ABAQUS 6.13. With Regards, Naveen. -
Cyclic constitutive model for cemented granular soils
Hamoun Alimoradi||Constitutive Modelling|2 |
Views 342
if you could please let me know whether Is there any constitutive model exist for capturing cyclic response for cemented materials just like cemented sand and gravelly soils. -
Hypoplastic Intergranular vs Triaxial Data
Hashmi Sohawon||Constitutive Modelling|2 |
Views 340
Hi David, I am trying to reproduce some Triaxial data from Coop et al. (1995) using the Hypoplastic Model with Intergranular Strain Concept on Triax. So far, I cannot get […] -
Errors of sand hypoplastic model with Abaqus Vumat
Kunpeng Wang||Constitutive Modelling|9 |
Views 372
Dear all, Recently, I have been working on the simulation of a pile-soil interaction with CEL method in Abaqus/Explicit. I simulate the sand with the Sand Hypoplasticity Model provided by […] -
3D analysis with Basic Hypo-Plastic Model
sobhan abedinnejad||Constitutive Modelling|2 |
Views 285
Dear all Is the basic Hypo-Plastic model (Wollffersdorff’s model) suitable for 3D models? Can I analyze 3D models with this UMAT? (https://soilmodels.com/download/umat-hyposand-uibk/) Thank you Sobhan
Who is Online
No one is online right now
Search SoilModels Website
Recent posts
-
Oedometer tests on Ticino sand 8.4.2021
-
PM4Silt now available in PLAXIS 2D 30.3.2021
-
Two postdoctoral positions in computational mechanics in Ben Gurion university and Ariel university, Israel, are available immediately 28.2.2021
-
K0 determination Reloading using HP clay model 22.2.2021
-
Seismic Liquifaction 11.2.2021
-
Modelling cyclic loads in Tochnog 11.2.2021
-
Soft soil model vs Soft soil creep model 8.2.2021
-
Boundary value problems for granular materials subjected to earthquake loading 8.2.2021
-
Guidance for a newbie 6.2.2021
-
Modelling Rate-dependent behaviour of clay [Urgent] 1.2.2021
-
Postdoctoral Fellowship in computational geomechanics 27.1.2021
-
USDM – Creep -SCLAY1S 25.1.2021
Recent Comments
- 略轩 黄 on PLAXIS
- Micha Van der Sloot on PLAXIS
- 略轩 黄 on PLAXIS
- Micha Van der Sloot on PM4Silt software
- Sudipta Bhowmick on Clay and Sand hypoplasticity UMAT and Plaxis implementations, including UMAT-Plaxis interface
- MOHD SAQIB on Seismic Liquifaction
- Shaoxiang Chen on Download Package of Matlab Driver
- Shaoxiang Chen on Download package of ISA cyclic hypoplasticity for Abaqus
- Ademola Bolarinwa on Triax element test driver
- Mehdi Joneidi on A problem of convergence from using Hypoplastic model in Abaqus
- Mehdi Joneidi on Boundary value problems for granular materials subjected to earthquake loading
- Mehdi Joneidi on Kadlíček, T. and Mašín, D. (2020). The strength reduction method in clay hypoplasticity. Computers and Geotechnics (in print)
- David Mašín on Kadlíček, T. and Mašín, D. (2020). The strength reduction method in clay hypoplasticity. Computers and Geotechnics (in print)
- Mehdi Joneidi on Kadlíček, T. and Mašín, D. (2020). The strength reduction method in clay hypoplasticity. Computers and Geotechnics (in print)
- Micha Van der Sloot on PM4Sand for Plaxis Download
- Eduardo Muguet on PM4Sand for Plaxis Download
- Sudipta Bhowmick on Subroutine of SANISAND model
- Sudipta Bhowmick on SANISAND (Dafalias and Manzari, 2004)
Dear Pooja, thanks for your comment. Please check the Download section. I have uploaded updated version of SANISAND umat, including Plaxis interface. Thanks to my colleagues from Zhejiang University for releasing the implementation.
Sir, Is this file also available for ABAQUS?
Sir,
is the sanisand umat is available for abaqus implementation?
Yes, umat is Abaqus format
i am able to download only the plaxis-umat sanisand model. Is the same can be use for abaqus?
Download package contains complete description what is inside:
https://soilmodels.com/download/plaxis-umat-sanisand/
Thankyu sir..i got mymod_sas.for…stvarlini.for….umat.for…usr_add.for and usrmod.for
Which one i should use
I am using it for a pile group model sir 🙂 thankyu somuch for ur time
Arun, as you will see if you open the package, there is directly the umat.for file, which is the Abaqus implementation. Note however that there is no detailed documentation of this package, it is provided on SoilModels on as-is basis for experienced users. If you need some more documented constitutive model implementation, you may also want to check sand hypoplasticity.
Thank you sir for your time ..i am working on it..surely i ll let u know the progress
I am using this model to simulate soil triaxial compression test by Abaqus (Axisymmetric model) but unfortunately it doesn’t give me the post peak softening results. I tried for Monotonic and cyclic loading and also with different soil model parameters but it is the same situation for post peak. Does it need any change in Umat code for softening or is there any solution (or suggestion) for this problem?
Hi Hossein, I contacted Yannis Dafalias, who contacted Majid Manzari and they have the following suggestion:
David
After I forwarded the site with the problem to Professor Manzari, I received the following response:
Professor Dafalias,
The student should use the parameters reported in the paper to simulate one of the drained triaxial compression tests shown in the paper. If he cannot get a stress-strain curve similar to what is shown in the paper, then the issue is with the numerical implementation of the model.
Thanks,
Majid
It is a good idea for the user to use first exactly the input from the paper to check if he can get the same response. The issue of softening is quite tricky if not handled correctly.
Best
yfd
Hello Hossein
If you write down the model input parameters you are using, the initial stress state and the maximum strain level you reach during your monotonic triaxial test I might be able to help you.
Dear David and Alexandros
Thank you for your replies, Fortunately I could calibrate the UMAT code parameters with my Triaxial Test experiment results in Abaqus and it works well now.
Best regards,
Hossein
Hello to all,
I have been trying to simulate the cyclic triaxial test using the SANISAND04 umat provided here When I plotting the stress path (p-q plot), I am getting only the positive value of q. Maybe because the definition of q i.e; sqrt(J2) always gives a positive value. How to get the negative values of q?. Am I missing something in modeling in Abaqus?. Please help me to figure things out.
Thanking you
SAQIB
Hi,
How can I determine the model parameter ‘m’? I am using ABAQUS Explicit interface to simulate the simple shear behavior of sand.