At present, I am trying to realize Drucker-Prager Cap model by using vusdfld and usdfld of abaqus. If anyone is willing to share their work, I would be grateful!
Hello, I am trying to learn ‘Numerical modelling of the effects of consolidation on jack-up spudcan penetration.’ I would like to ask, when using the RITSS method, which variables in […]
After downloading the umat_vec.f related files (and the spw_hy.inp (publishe by Fellin at all) I got runtime problems in Abaqus 2020 during the first step. The error message in the […]
While performing drained triaxial compression tests on hypoplastic clay using ABAQUS, I observed that the specimen’s porosity remains constant. Additionally, I have questions regarding the application of the material parameter […]
Dear I want to connect remote sensors to my engineering software Plaxis FEM 3D. Some days ago I was able to connect the python to the Plaxis FEM 3D, but […]
In Abaqus how do we use *DLOAD for defining both user-defined pressure and body force simultaneously?
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In Abaqus how do we use *DLOAD for defining user-defined pressure and body force simultaneously? I want to user-define both body fore and pressure.
Hi All, I am currently working on a research problem involving the implementation of the SANISAND04 UMAT (Soil models) in Abaqus for embankment analysis. While I have successfully tested the […]
Hi Everyone. I am new to this Platform. I want to use the hypoplastic model in my research. how I can download it UMAT file for ABAQUS software?
Dear all, I need to use ABAQUS to analyze the liquefaction of saturated soil under explosive load. How should I simulate this process? Currently I need the pore water pressure […]
Dear all, A while ago, a person asked about the hypoplasticity umats, the problem was that the umats were not working when compiled using the oneAPI fortran compiler, an error […]
I have a question regarding the simulation of cone penetration tests using the SANISAND04 model. I have observed that the parameter m (yield surface size）has a significant impact on the […]
Hello.. I am new in FLAC3D, could some send to me an example of data file code for pile soil interaction with seismic loads ? I will be thankful
Dear all, I’m looking for a sigini and sdvini subroutine examples to calculate soil initial state with rest coeficient K0 method or ICP-05 method or any method available. thank you. […]
Dear all I was simulating a pile in a fully drained soil subjected to horizontal loads using ABAQUS (as shown in Figure 1) and noticed from the monitor that the […]
Dear all I am recently working on the mechanical characteristics of large diameter monopiles under horizontal loads.The numerical simulation part of this project was carried out in ABAQUS/STANDARD and for […]
Hi, I have a question regarding local, material-level convergence tolerances in FE software, particularly Abaqus and Plaxis. I have experience using Abaqus but not much familiar with Plaxis. As shown […]
Hello.. I am testing SaniSand constitutive model as published by Mr. Masin at this site. The Abaqus is V21 and the visual studio 2017 with OneAPI compiler, the Abaqus verification […]
Few more Question on calculating lateral displacement of pile using hypoplastic clay model
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Dear Professor David, Thank you very much for your previous clarification. its really helps. In continuation to my previous , there are few more question, i want your kindself to […]
Problem in calculating Lateral displacement of the pile using Hypoplastic clay model
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Hy Professor David, I am trying to verify the result of one of your paper by the title ‘Cyclic lateral response and failure mechanisms of semi-rigid pile in soft clay: […]
Special issue of Computers and Structures “Numerical simulation of multi‐physics phenomena in geotechnical structures”
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https://www.sciencedirect.com/journal/computers-and-structures/about/forthcoming-special-issues Numerical simulation of multi‐physics phenomena in geotechnical structures Complete and thorough analysis of geotechnical structures, requires various complex materials models with internal structures, which cannot be described by the […]
Hi, I’m facing a problem with my model. I’m trying to simulate a helical pile in soil. When I create the job, my job doesn’t make any increment and the […]
Hello everyone, Is it possible to use pore fluid- stress element in abaqus standard when soil is modeled using SANISAND constitutive model ? (UMAT)
Hello, This Abou Alhaija Majd, Ph.D. student at Technical University of Civil Engineering Bucharest, i am looking for Micropiles load test data to be used for calibration in my study, […]
DIANA 10.5 was released in 2021. It features many powerful capabilities to model soil-structure interection. See more in https://dianafea.com/2021-DIANA10-5-Release
Hello Everyone, I am trying to implement an unsaturated soil model (BBM or similar) in ABAQUS using UMAT. We want to assign a pore-pressure boundary condition for simulating the drying […]
Hi everyone, i want to carry out some transient dynamic analysis. as far as I know, dynamic steps in abaqus does not allow for pore pressure build-up and dissipation, and […]
Dear all I have FEM analysis results for vibration foundation response that rested either on saturated salt-encrusted flat soil (case-1) or on finite cemented sand overlie saturated salt-encrusted flat soil […]
Hi everyone, i am modeling laterally loaded monopile using abaqus, My 3d model looks like this, only half of the model is simulated, symmetry boundary conditions is applied to the […]
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, […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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. […]
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, 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 […]
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 […]
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 […]
Barodesy download package including small strain stiffness and strength reduction (UMAT and PLAXIS dll)
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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 fellow, Anyone have SANISAND 2008 by Taiebat and Dafalias umat subroutine available for Abaqus. I have 2004 but I need 2008 one.
Hello everybody, Does somebody know a FEM Software with the implementation of PM4Silt model’s routine? I mean, one different from FLAC. Thanks for your help.
I am currently modelling a test conducted in the geotechnical centrifuge facility at HKUST. The test consisted of a sand slope with a rising water table. The slope height in […]
Slope stability calculation with hypoplasticity using phi-c reduction available now in download section
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The strength reduction method in clay hypoplasticity now available
ABAQUS modeling: Warning about unconnected regions when using hypoplasticity subroutine
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I ran a simple 3D model with symmetry boundary conditions first using elastic material and then as hypoplastic using a subroutine. However, in the former case, I don’t get the […]
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Recent posts
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Drucker-Prager Cap 29.5.2025
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Abaqus RITSS with hypoplastic 9.4.2025
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Fellin UMAT subroutine 2.4.2025
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Hypoplasticity clay for triaxial compression in abaqus 26.3.2025
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Abaqus RITSS methon for LDFE analysis with hypoplastic 17.3.2025
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Request for VUMAT Implementation of Mohr-Coulomb, Drucker-Prager, or Drucker-Prager Cap 28.2.2025
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Suggestions for an Advanced Constitutive Model in FEM-Based Dynamic Slope Stability Analysis 12.2.2025
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Hardening Soil or Hardening Soil-Small umat in Abaqus 2.1.2025
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hypoplastic interface 11.12.2024
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Triaxial Test Driver SANISAND 30.10.2024
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REQUEST FOR EXPRESSIONS OF INTEREST (REOI) FOR PROJECT IN CONSTITUTIVE MODELLING 23.10.2024
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Programme of the ALERT Olek Zienkiewicz school on Constitutive Modelling of Geomaterials, February 3 to 7, 2025, Prague, Czech Republic 11.10.2024
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