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 […]
SoilModels Forum
Two postdoctoral positions in computational mechanics in Ben Gurion university and Ariel university, Israel, are available immediately

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786
Two postdoctoral positions are available in Israel for one year, with the possibility of renewal for up to three years. The projects will be conducted in AU and BGU, under […]
K0 determination Reloading using HP clay model

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1,007
Hi Prof. Masin , It is related to my previous post. Sorry to bother you again. I simulated Oedometer test in Plaxis as well as centrifuge reloading (using HP clay […]
Seismic Liquifaction

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1,001
Hello All, I am trying to simulate the seismic liquefaction in Abaqus. Can you please help me to model this. Best Regards’ Saqib
Dears all, I am using Tochnog professional software to model undrained cyclic triaxial test for behaviour and liquefaction studies. Is there an incremental driver model to execute for compressional cyclic […]
Soft soil and soft soil creep model both include time while performing the analysis. What is the difference between both of them.
Boundary value problems for granular materials subjected to earthquake loading

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823
Dear All, Hope you all well, I have been searching for some good publications on the Boundary value problems on Foundation system with granular materials subjected to earthquake loading or […]
Guidance for a newbie

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412
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. […]
Modelling Rate-dependent behaviour of clay [Urgent]

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946
Using PLAXIS, how to model rate dependent behavior of clay. This is to show the viscous behavior of the soil. Thank you in advance
USDM – Creep -SCLAY1S

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1,041
I have the license, but can’t login as it is a server license. In order to access this model, i need the .dll file. Can anyone help me with this. […]
Hardening Soil Model in Abaqus

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1,676
Is there Hardening Soil Model in Abaqus?
Effects of water content in sand in hypoplastic strength parameters

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920
Dear All, I am currently using the hypoplastic model for gran materials from Prof. von Wolffersdorff to simulate soil excavations in a context of large deformations. I have been searching […]
How do I perform oedometer test simulation in PLAXIS
Hello all, I am trying to implement boundary surface plasticity using Bardets model in MATLAB. But i am obtaining negative values for q and Dep. Any help in this regard […]
I am looking for an example of the oedometric test similation with Abaqus, in particular : Load-Unload-Reload
SANISAND 2008 Model

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1,005
Hello Everyone, Can anyone have umat available for SANISAND 08 (Simple anisotropic sand plasticity model)?. Paper authored by Taiebat and Dafalias. They have used a closed type yield surface. Regards […]
UMAT Implementation in Abaqus (Hypoplastic clay Subroutines)

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986
Hi, I am working in Abaqus, aiming to model double porosity clay consolidation data by using hypoplastic clay model with meta stable structure. First, i just wanted to verify basic […]
Issues on reading xlsx extension for calibration input data

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304
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 […]
Issues in getting the negative values of q (mean deviatoric stress) while simulating cyclic triaxial test in ABAQUS using SANISAND subroutine.

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1,178
Hello Everyone, I have been trying to simulate the cyclic triaxial test using the SANISAND04 subroutine. When I plotting the stress path (p-q plot), I am getting only the positive […]
Dear all, I am a Ph.D. student at Kharazmi University. Recently I have been trying to simulate a triaxial compression test using the hypoplasticity model for clay using ABAQUS. The […]
HP clay subroutine in Plaxis

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1,272
Dear Prof. Masin and Soil Model Community, I am using HP clay subroutine in Plaxis 3D to simulate soil structure interaction problem. I want void ratio and OCR variation along […]
Modeling cyclic undrained sandy soil triaxial test using ABAQUS

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1,249
Dear all, I am trying to use Abaqus to modeling undrained cyclic triaxial test for liquefiable soil. I am wondering how could I applied the cyclic load. I should apply […]
UMAT for NorSand

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1,356
Dear all, I am pretty new in coding and using Abaqus. I have trouble with coding the UMAT for NorSand. If any of you have any good references, please share […]
Problem with Hypoplastic Vumat use with CEL in Abaqus

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916
Hello all, I am currently working on the FE modeling of anchors installation into the soil using the CEL analysis in Abaqus. I tried to use the hypoplastic vumat for […]
Interpreting results of sand hypoplastic model with Abaqus VUMAT

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1,387
Dear concern, Recently i have modelled the soil pile interaction using Abaqus CEL method. The hypoplastic behavior of the soil is model using user subroutine VUMAT. The properties of the […]
Interpreting results of sand hypoplastic model with Abaqus VUMAT

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1,062
Dear concern, Recently i have modelled the soil pile interaction using Abaqus CEL method. The hypoplastic behavior of the soil is model using user subroutine VUMAT. The properties of the […]
Dear all, I am simulating static pile load test in the rock by using ABAQUS. For comparison of numerical results with the experimental, I need skin friction vs depth plot. […]
SANISAND pile-soil-interaction ABAQUS

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1,281
Hi everyone: I am trying to use SANISAND as the constitutive model of soil, and use ABAQUS software to simulate pile-soil interaction. First step is “Geostatic”, the second step is […]
Issues with Tochnog Professional not posting groundflow velocities

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831
I have been a =n user of the open source version of Tochnog for since 2004. I have been one of the maintainers and have contributed to the capabilities of […]
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 […]
a question on the clay hypoplasticity model with Abaqus umat

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1,003
Dear all, I am a PhD student in Hohai University. Recently I have been trying to simulate a triaxial compression test using the hypoplasticity model for clay. The UMAT subroutine […]
UMAT Code for Modified Cam Clay model

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1,815
I am trying to develop UMAT code for MCC, but facing difficulty. Is there any such files available which can help me to speed up. please refer. Thank you.
Mohr Coulomb umat in Abaqus

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1,638
Dear all, does anyone have the umat code for Mohr Coulomb in Abaqus? For my current work I need a umat for Mohr Coulomb in Abaqus. It would be highly […]
ABAQUS-UMAT Help

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461
Hi everyone, I would like to ask if anyone has an example umat file for me to study to work on my master thesis researches. I would like to create […]
SANISAND umat issue

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955
Hello everyone; I have implemented the Sanisand constitutive model (UMAT) in abaqus in the scope of performing a dynamic analysis on a 3D soil-pile interaction problem. I have succeded in […]
SANISAND pile-soil-interaction ABAQUS

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1,164
Hi everyone: I am trying to use SANISAND as the constitutive model of soil, and use ABAQUS software to simulate pile-soil interaction. Is it better to choose “Static, Genaral” analysis […]
Abaqus user defined field

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1,298
Hi, I am going to use the usdfld to function the density of sand changing due to confining pressure. I am not sure Abaqus will call the usdfld for every […]
Hardening parameters (yield stress & absolute plastic strain)

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1,851
Hi to everyone I want to model a Sand with Cap plasticity or Drucker Prager failure criterion in ABAQUS, and I have the result of Triaxial test (I’ve attached the […]
Errors of sand hypoplastic model with Abaqus Vumat

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1,553
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 […]
Barodesy download package including small strain stiffness and strength reduction (UMAT and PLAXIS dll)

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956
A new download package for Clay Barodesy is available in the download section (https://soilmodels.com/barodesy/) The model uses the basic model of barodesy for clay (Medicus G. and Fellin W. 2017) […]
Dear all, After carefully reading the matlab drivers of hypoplastic models, I was wondering why there is not mix control undrained TX compression. I want to achieve the same result […]
Hypoplastic Interface Model: Does anybody implemented this model in FLAC3D

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1,086
I want to use this model to simulate soil-structure interaction in FLAC3D software, so I was wondering does anybody implemented this model in FLAC3D, and could you please share your […]
Question on implementation of sand hypoplastic model with Abaqus umat

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1,290
Dear all, I am a PhD student in China University of geosciences. Recently, I have been working on the simulation of a pile-soil interaction with Abaqus. I simulate the sand […]
General questions on implementation of sand hypoplasticity model with Abaqus umat

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1,434
Dear all, I am a PhD student in Zhejiang University. Recently, I have been working on the simulation of a braced excavation with Abaqus. I want to simulate the soil […]
SANISAND 2008 model

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853
Dear fellow, Anyone have SANISAND 2008 by Taiebat and Dafalias umat subroutine available for Abaqus. I have 2004 but I need 2008 one.
As a beginner to soil constitutive modelling, I am learning the hypoplastic models by reading the matlab drivers. I am confused with the matlab file f_hyp.m in the model hypo_sand. […]
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Input files for element tests for hypoplastic clay/sand UMAT 6.3.2022
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