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 […]
Archive for category: Finite Elements
Few more Question on calculating lateral displacement of pile using hypoplastic clay model

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2,577
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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1,981
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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4,178
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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2,182
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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2,460
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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2,873
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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2,667
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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3,271
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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2,092
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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2,296
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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2,163
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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1,976
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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1,986
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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2,233
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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2,554
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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2,502
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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2,107
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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2,259
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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2,134
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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1,943
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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2,227
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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554
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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2,176
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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2,108
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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2,003
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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2,143
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

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2,359
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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2,432
The strength reduction method in clay hypoplasticity now available
ABAQUS modeling: Warning about unconnected regions when using hypoplasticity subroutine

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3,111
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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1,959
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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2,082
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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2,009
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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2,267
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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2,226
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 […]
DIANA with monopile follows Blum theory saving 10 m of length

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1,974
Where the client was forced to make all his horizontal loaded Dolphins (piles) 10 m longer we could trustworthy proof that this actually was not necessary saving millions of cost […]
finite element modeling of ISA-HP for sand material

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2,049
On the simulation of the cyclic mobility effect with an ISA -hypoplastic hypoplastic hypoplastic model, is it possible to simulate 3D liquefiable sandy soil by available u-mat file which is […]
Geostatic method for Abaqus/Explicit

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3,171
Dear all, I recently conducted a numerical simulation of pile-soil interaction. I digged a vertical hole and insert the pile into that with general contact. Due to many reasons, I […]
Calibrate hypoplastic model

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2,059
I am trying to calibrate my sand using Excalibre. I tried some triaxial element tests using Abaqus. However the results are different between Excalibre and Abaqus.
problem with sanisand umat

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2,271
Dear all, I’m trying to model multilayer soil in abaqus. To use the SaniSand umat in model I use the following parameters but no plastic strain at all. The unit […]
Modeling of triaxial test sample by using hypoplastic subroutine

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2,509
I tried to model sample of triaxial test in Abaqus program. I used hypoplastic subroutine. The parameters used in hypoplastic model was Hochstetten sand the given in website “https://web.natur.cuni.cz/uhigug/masin/plaxumat/node5.html”. The […]
A problem of convergence from using Hypoplastic model in Abaqus

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2,234
Dear all, The sand hypoplastic model has been used to simulate the interaction between soil and pile. However, there is a bad convergence in the process of calculation. When I […]
Some confusion about the parameters in Abaqus umat of Hypoplastic Modeling

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1,995
Dear all, When I check the umat file of sand hypoplastic modeling, I find there are two parametesr(p_t(2), bulk_w(15)) without any definitions. Could someone kindly explain the exact meaning for […]
fortran format

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2,092
hi, every one i have problem with fortran format my abaqus is 6.14 and this version accept (.for) format for fortran but some subroutines are in (.f ) format is […]
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Zbraslav sand – Cyclic tests by Charles University 17.1.2023
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New features in Excalibre 17.1.2023
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Sanisand 13.1.2023
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SaniSand Model in Plaxis 3D 9.12.2022
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The GA-cal software for the automatic calibration of soil constitutive laws 2.12.2022
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Abaqus OneAPI Compiler 10.11.2022
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Few more Question on calculating lateral displacement of pile using hypoplastic clay model 3.10.2022
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A question about the hypoplastic model in clay 22.9.2022
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A High-Cycle Accumulation Model for Sand (Niemunis et al., 2005) 6.9.2022
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Malaysian kaolin – Cyclic tests by Charles University 5.9.2022
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Problem in calculating Lateral displacement of the pile using Hypoplastic clay model 2.9.2022
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GTS NX 25.7.2022
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