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 […]
Archive for category: Finite Elements
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 […]
Problem in simulating CPT using SANISAND04

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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 […]
Example of FLAC3D data file

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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
sigini ans sdvini subroutine example for soil model in Abaqus

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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. […]
An error in the SANISAND umat runtime

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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 […]
set cavitation limit in ABAQUS/STANDARD when using SANISAND umat

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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 […]
FE formulation and software

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Hi, I am looking for advice on FE formulation and software. I am a recent graduate of MSc Geotechnical Engineering and am looking to do freelance work or possibly undertake […]
Abaqus vs Plaxis – Local Convergence Tolerances

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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 […]
Abaqus OneAPI Compiler

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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 […]
Using pore fluid-stress element in SandSand

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Hello everyone, Is it possible to use pore fluid- stress element in abaqus standard when soil is modeled using SANISAND constitutive model ? (UMAT)
Micropiles load tests database

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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 new features

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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
UMAT code for Unsaturated soil modes

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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 […]
Vibration foundation behavior

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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 […]
Hypoplasticity sand convergence issues

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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 […]
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, […]
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

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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 […]
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 […]
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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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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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 […]
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 […]
Skin friction along depth of pile

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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. […]
Issues with Tochnog Professional not posting groundflow velocities

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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 […]
a question on the clay hypoplasticity model with Abaqus umat

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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 […]
ABAQUS-UMAT Help

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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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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)

Views 3,302
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) […]
SANISAND 2008 model

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Dear fellow, Anyone have SANISAND 2008 by Taiebat and Dafalias umat subroutine available for Abaqus. I have 2004 but I need 2008 one.
PM4Silt software

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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.
Factor of safety in Plaxis 3D using hypoplastic model for sand

Views 3,746
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 […]
Hi, I am doing Plane strain 2D simulation of GRPS embankment in ABAQUS, i encountered a problem that results of with geogrid and without geogrid both are showing same deflection. […]
Hypoplastic model for clays in a Plaxis 2D simulation – Problem

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Hello everybody, Using Hypoplastic model for clays, with intergranular concept parameters, I am simulating a simple oedometer test, phase by phase, using a dummy layer on the top of the […]
I am modelling sand slopes in Plaxis 3D using an HP model. I am using soil parameters from “Modelling of Soil Behaviour with Hypoplasticity” by David Masin (2019). During the […]
DIANA 10.4 released with full Geotechnical possibilities 3D as always, but now also 2D!

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We are pleased to announce that DIANA 10.4 is released with full 2D geotechnical possibilities. DIANA is already easy to use for full 3D geotechnical models, and now the more […]
Free Tochnog Professional list of capabilities and papers

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Dear All, you can find a list with some of Tochnog Professional capabilities and application papers at: http://www.tochnogprofessional.nl/Tochnog_Professional_wikipedia_format.pdf Stay safe, Dennis Roddeman
hypoplasticity models in free Tochnog Professional

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In this post we will list built-in hypoplasticity formulations in the free Tochnog Professional program. Since these hypoplasticity options are built-in there is no need to link external umat routines. […]
Dear All, We posted a small overview movie of Tochnog Professional in YouTube. For more movies see the complete channel.
Tochnog Professional becomes free

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After several decades of development we are happy to announce that the Tochnog Professional finite element program has become free. Both for academic and commercial use. We are extremely grateful […]
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Recent posts
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BCV bentonite experimental and modelling datasets 14.11.2023
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Challenges in simulating geomechanical models using Mohr-Coulomb with Tension Cut-Off in Abaqus 20.10.2023
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Analys soil liquefaction with Abaqus under blast load 19.10.2023
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Hardening soil Model UMAT 13.9.2023
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Problem with VUMAT interface 20.8.2023
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UMAT and oneAPI compiler issues. (SOLVED…i hope :p) 5.8.2023
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Oedometric Test Soil Test Plaxis 21.7.2023
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Problem in simulating CPT using SANISAND04 10.7.2023
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Problem with UMAT for clay hypoplasticity. Program exiting. 30.6.2023
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Example of FLAC3D data file 10.6.2023
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sigini ans sdvini subroutine example for soil model in Abaqus 6.6.2023
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Presentations from Prague Geotechnical Days 2023 including 29th Prague Geotechical Lecture by Yannis Dafalias 25.5.2023
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