SoilModels Forum
Cyclic Triaxial Test

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Dear All, I am using ISA+HP model in my research and I have encountered some problem when looking into cyclic triaxial test for single element. The target model was selected […]
matlab driver

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Hi everyone. When i try to run the matlab driver I get the following error, how can i sove it ? (The constructor for class ‘update’ must return only one […]
Boundary Conditions of Masin 2005 Paper for clay hypoplasticity

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Hello, I am using clay hypoplastic umat code and trying to verify the code with the simulation on the paper of Prof. Masin. I found in the paper (Masin, 2005, […]
Dear all, I have a question about Hypoplasticity for sand model, i am having trouble to understand about how to calibrate the mr parameter ? Since no formula is provided […]
UMAT Code for Clay Hypoplasticity

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Hello Everyone, I am using the UMAT code for clay hypoplasticity provided by Prof. Masin — https://soilmodels.com/download/plaxis-umat-hypoplas-zip/ I made a oedometeric test model in Abaqus2018 and applied the umat code […]
UDSM PLAXIS

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I implemented a unified dynamic soil model, but PLAXIS doesn’t calculate any strains, and it prints zero (or some times NaN amounts) into a text file. I’d like to know […]
With the growing comunity (SoilModels community now counts more than 2700 members), there was a need to include a search feature which would allow you to find colleagues within specific […]
How can I solve the error in Abaqus mentioned below?

Views 7,076
I am using SANISAND to simulate a triaxial compression test under monotonic loading. But every time my simulations break and give the same message “Abaqus/Implicit Packager exited with an error […]
PHD Position on “Triggering and propagation of liquefaction in brittle geotechnical materials” at CIMNE-UPC (Barcelona, Spain)

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3 year fully funded PhD. Application deadline: 31st May 2021 Liquefaction of brittle geotechnical materials (such as hydraulic fills, mine tailings, landfills and sensitive or quick clays) causes catastrophic failures […]
Guidance to newbie on how to calibrate a constitutive model

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Hi! I am studying the behavior of kaolin clay under cyclic loading. The strain rate is kept at such that undrained behavior is maintained. I want to use an advanced […]
Oedometer tests on Ticino sand

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

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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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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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Hello All, I am trying to simulate the seismic liquefaction in Abaqus. Can you please help me to model this. Best Regards’ Saqib
Modelling cyclic loads in Tochnog

Views 3,557
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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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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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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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

Views 4,527
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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Is there Hardening Soil Model in Abaqus?
Effects of water content in sand in hypoplastic strength parameters

Views 4,258
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 […]
Simulating Oedometer test in PLAXIS

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How do I perform oedometer test simulation in PLAXIS
boundary surface plasticity

Views 4,271
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

Views 4,269
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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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

Views 558
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.

Views 4,830
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

Views 4,536
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

Views 4,327
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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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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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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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

Views 4,102
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 […]
Skin friction along depth of pile

Views 3,708
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

Views 5,210
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

Views 3,604
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

Views 4,086
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

Views 5,955
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

Views 8,447
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

Views 889
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 […]
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