Hello all,
I’m using the SANISAND UMAT I downloaded here for my research, the problem I found is it gives me wrong results in ABAQUS and INCREMENTAL DRIVER for element tests, especially for monotonic draind test (it doesn’t reach the peak and gives a weird curve), I’m suspecting parameter 18 called Ptmult, but I saw here that everyone gives it the value of zero which is the same value I’m using but it gives me wrong results.
Can somebody help me in this issue?
Attached deviatoric stress vs axial strain curves for monotonic triaxial test on a sand in abaqus and incremental driver (the peak should be at 1400KPa).
Thanks in advance.
Problem with SANISAND UMAT
Related Articles
-
NorSand model for cyclic triaxial testing
A S M RIYAD||Constitutive Modelling|1 |Views 6,947
Hi altruists, Hope all of you are doing well. I am looking for literature on the NorSand model, which considers the drained cyclic triaxial testing behavior. I have found a […] -
Triaxial Callibration test with Hypoplasticity
pooyan ghasemi||Constitutive Modelling|3 |Views 3,962
Dear all I am trying to calibrate the HP for sand, and I have quite comprehensive data. but they are not totally consistent with each other . we have the […] -
Problem in using Hypoplastic model for sand in Abaqus.
isma khabis||Constitutive Modelling|16 |Views 1,872
Hello, I am using the UMAT code for sand hypoplasticity provided by Prof. Masin — https://soilmodels.com/download/plaxis-umat-hypoplas-zip/. I am simulating Axisymmetric condition in Abaqus. To check the results given by the […] -
Velacs Project Data
WaiChing Sun||Constitutive Modelling|1 |Views 4,026
Dear colleagues, I want to ask your help — does anyone know where we can find all the test data from the old Velacs Project? If so, that would be […] -
Question on the Matlab driver-hypoplastic models
c sx||Constitutive Modelling|0 |Views 4,055
Dear all, After carefully reading the matlab drivers of hypoplastic models, I was wondering whether the driver can simulate triaxial extension tests. As I change the constraints to reflect triaxial […] -
ExCalibre Automatic Calibration
Marco Hofer||Constitutive Modelling|2 |Views 4,115
Hello all, i hava a problem with the Oedometer curves after the automatic calibration with ExCalibre. I took the Dobrany sand dataset for an automatic calibration and then i copied […] -
Hypoplasticity & Recent Stress History
Hashmi Sohawon||Constitutive Modelling|2 |Views 4,191
Hi David, Can you please provide some comments on the ability of the Hypoplasticity model with intergranular strain concept to model the effects of recent stress history on the clay […] -
Calibration of the von Wolffersdorff model using Genetic Algorithms
Francisco Mendez||Constitutive Modelling|3 |Views 4,091
I am happy to announce that our pre-print paper, “Calibration of the von Wolffersdorff model using Genetic Algorithms”, is available on researchgate: https://www.researchgate.net/publication/342198062_Calibration_of_the_von_Wolffersdorff_model_using_Genetic_Algorithms. In this article, we propose a novel […]
Who is Online
No one is online right now
Search SoilModels Website
Recent posts
- 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
- Challenges in simulating geomechanical models using Mohr-Coulomb with Tension Cut-Off in Abaqus 20.10.2023
- Analys soil liquefaction with Abaqus under blast load 19.10.2023
- Hardening soil Model UMAT 13.9.2023
- Problem with VUMAT interface 20.8.2023
- UMAT and oneAPI compiler issues. (SOLVED…i hope :p) 5.8.2023
Recent Comments
- 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
- Ahmad Moeineddin on Problem with VUMAT interface
- Nikolay Suyo Calla on Hardening soil Model UMAT
- Johan Clausen on Challenges in simulating geomechanical models using Mohr-Coulomb with Tension Cut-Off in Abaqus
dear Safia,
par 8 is axial shift of yield shape.
i.c.o. mohrcoulomb = coh/tan(phi)
Which value you use for Mc?
Dear Arie,
Thank you for your reply, I have a sand with coh=0.
However, I think I fixed the issue by giving “cz” (parameter 16) a big value = 10000, I don’t know if it will affect the calibration though.
par 8 = par 18