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
-
Question about Interface between UMAT and VUMAT
Sina Niazi||Constitutive Modelling|1 |Views 4,335
Hello, I read the research report and the FORTRAN code available at https://soilmodels.com/download/vumat_umatinterface-zip/. It sounds quite interesting but I have a couple of questions about the FORTRAN code: 1- Did […] -
Getting started with UMAT for Hypoplastic clay model in ABAQUS
Kanika Lamba||Constitutive Modelling|0 |Views 4,356
Hello All, I am getting started with implementing UMAT for soil model in ABAQUS. I am planning to use Hypoplastic clay constitutive soil model to simulate the triaxial tests. I […] -
Spurious oscillations in calculated accelerations
Piotr Kowalczyk||Constitutive Modelling|2 |Views 4,141
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 […] -
PM4Sand and PM4Silt models available
Katerina Ziotopoulou||Constitutive Modelling|4 |Views 4,688
The constitutive models PM4Sand (Boulanger and Ziotopoulou 2017) and PM4Silt (Boulanger and Ziotopoulou 2018) for plane-strain earthquake engineering applications for sands, and clays and low-plasticity silts respectively are now available […] -
Clay Hypoplastic Model ABAQUS UMAT
Hashmi Sohawon||Constitutive Modelling|3 |Views 4,456
Hi, I wanted to ask if the variables/parameters defined in the online Hypoplastic model manual for PLAXIS (https://web.natur.cuni.cz/uhigug/masin/plaxumat/node6.html) are the same for the ABAQUS UMAT? -
PLAXIS 2D Embedded Pile Row
BENAN ZAHAWI||Constitutive Modelling|0 |Views 4,689
PLAXIS 2D require a “Lateral Resistance ” for the embedded pile row. The manuals are not very clear as to what the resistance represents? Is it on friction ( similar […] -
Implimentation of SANISAND constitutive model in ABAQUS/Standard for a soil-monopile interaction
philip alkhoury||Constitutive Modelling|4 |Views 5,203
Dear all, I am trying to model soil-monopile interaction (3D) in ABAQUS/Standard in order to perform subsequently a cyclic and dynamic analysis. For the soil I am using the SANISAND […] -
Calibration of Hypoplastic material model parameters
Amine Aboufirass||Constitutive Modelling|6 |Views 4,392
I would like to derive material parameters based for a simulation which will implement the hypoplastic material model based on the following information: • Heavily overconsolidated • Very dense, fine […]
Who is Online
No one is online right now
Search SoilModels Website
Recent posts
- Degradation ( disturbance ) of hypoplastic clay 23.4.2024
- Degradation ( disturbance ) of hypoplastic clay 23.4.2024
- Paper of Coulomb, C. A. (1773) 15.4.2024
- ABAQUS UMAT of hypoplastic clay model 6.4.2024
- Prague Geotechnical Days 2024 “Geotechnical monitoring” and 30th jubilee Prague Geotechnical Lecture by prof. Eduardo Alonso 5.4.2024
- UMAT for Creep-SCLAY model. 1.3.2024
- Cyclic tests with Triax element test driver 14.2.2024
- SUMMER SCHOOL ‘Numerical Modelling in Geotechnical Engineering’, Innsbruck – July 22nd-26th, 2024 1.2.2024
- COURSE IN SOIL MODELING – NTNU, Trondheim – October 14th to 18th, 2024 21.12.2023
- MSE walls design in Plaxis 11.12.2023
- sand liquefaction modelling in Anura3D 8.12.2023
- BCV bentonite experimental and modelling datasets 14.11.2023
Recent Comments
- Jh Xue on Undrained Tests with Clay Hypoplasticity Intergranular
- Zhentao Liu on Problem in simulating CPT using SANISAND04
- Gertraud Medicus on ABAQUS UMAT of hypoplastic clay model
- Chen Zhiming on Download Package of Charles University Implementation of High Cycle Accumulation Model
- Konstantinos Chatzis on Cyclic tests with Triax element test driver
- Abhay Pratap Singh on Cyclic tests with Triax element test driver
- Giovanni Ciardi on Cyclic tests with Triax element test driver
- Konstantinos Chatzis on Cyclic tests with Triax element test driver
- Ismail Khan on Cyclic tests with Triax element test driver
- Kanika Lamba on Cyclic tests with Triax element test driver
- Arie Koot on How to model the settlement in soil due to water drawdown.
- Konstantinos Chatzis on Cyclic tests with Triax element test driver
- Jose Duque on Cyclic tests with Triax element test driver
- MohamadReza Kamali on How to model the settlement in soil due to water drawdown.
- Leo Alibert on MSE walls design in Plaxis
- Ignacio Zuloaga on MSE walls design in Plaxis
- Giada Orlando on Problem with VUMAT interface
- Michael Spyridis on Problem with VUMAT interface
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.