I have a UMAT of Mohr Coulomb with no hardening, where i have to define SSE (specific strain energy) and SPD (specific plastic dissipation). Any idea?
SoilModels Forum
Papers on Excalibre
David Mašín||Constitutive Modelling|0 |
Views 4,449
Hi all, Details of Excalibre software (https://soilmodels.com/excalibre) functionality and calibration procedure have been published in two papers, which are now available online at the webpages of publisher (https://link.springer.com/article/10.1007%2Fs11440-021-01441-0 and https://link.springer.com/article/10.1007%2Fs11440-021-01435-y). […]
Abaqus UEL Hypoplasticity
anis kheffache||Constitutive Modelling|0 |
Views 5,174
Dear all, I want to implement a new user element using the UEL subroutine. To simulate dynamic cases, one has to define the mass, damping and stiffness matrix then build […]
Three PhD positions in soil mechanics at Charles University, Czech Republic
Gianvito Scaringi||Position Announcements|0 |
Views 1,267
The Soil Mechanics group led by David Mašín at Charles University, Prague, Czech Republic, is seeking three motivated PhD students with experience in modelling and/or experiments to work on the […]
Hypoplastic UMAT & Void Ratio
Hashmi Sohawon||Constitutive Modelling|0 |
Views 5,573
Hi all, Can anyone give a clarification on the material property (parameter 22) in the hypopplasticity umat for clay on Abaqus. My understanding is that these parameters are defined as […]
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 […]
Modelling TX monotonic compressive test with ABAQUS and SANISAND – not working
Riccardo Zabatta||Constitutive Modelling|9 |
Views 4,463
I am trying to reproduce a TX monotonic, compressive test on a sand by using a 1-element, axisymmetric ABAQUS FE model, assigned to a SANISAND material. For this purpose, I […]
Vibration foundation behavior
Naif Alsanabani||Finite Elements|0 |
Views 4,593
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 […]
Getting started with UMAT for Hypoplastic clay model in ABAQUS
Kanika Lamba||Constitutive Modelling|0 |
Views 4,288
Hello All, I am getting started with implementing UMAT for soil model in ABAQUS. I am planning to use Hypoplastic clay constitutive soil model to simulate the triaxial tests. I […]
consistent tangent stiffness calculation in hypoplasticity sand UMAT
Ran Tu||Constitutive Modelling|1 |
Views 4,555
Dear all, Thanks for hypoplasticity sand UMAT provided by Prof. Masin. During studying hypo sand UMAT, I am encountered with a question about consistent tangent stiffness calculation. subroutine ”perturbate_h“ seems […]
Dear forumers: Thanks to hypoplasticity sand UMAT provided by Prof. Masin — https://soilmodels.com/download/plaxis-umat-hypoplas-zip/. But during studying above sand UMAT, I found that the stress order may be incorrect. Because stress […]
ALERT doctoral school on constitutive modelling – hands on session triax input files
David Mašín||Constitutive Modelling|0 |
Views 4,299
ALERT doctoral school on constitutive modelling is happening right now. The school lecture notes are available at the website of ALERT geomaterials (http://alertgeomaterials.eu/publications/) Below you find triax input files for […]
Initial Stiffness of CU test in Masin’s 2014 Model
Shen Wang||Constitutive Modelling|1 |
Views 4,047
Hi, I am using Hypoplasticity model with explicit asymptotic boundary surface proposed by Prof. Masin in 2014. In this model, parameter ‘nu’ controls initial stiffness in CU test. But when […]
CONSTUTUTIVE MODELLING
MOHD SAQIB||Constitutive Modelling|0 |
Views 4,433
Can SANISAND version given in soil model work well for cyclic simple shear test ?
Hi Admin, I have been using hypoplastic subroutine supplied by this website. It works well in ABQ6.14 and ABQ2017. However, recently I have to upgrade to ABQ2021 due to an […]
Hypoplasticity sand convergence issues
anis kheffache||Finite Elements|0 |
Views 3,438
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 […]
MATLAB Code for Bounding Surface Plasticity Model
A S M RIYAD||Constitutive Modelling|0 |
Views 4,527
Dear Altruists, I just wanted to learn the bounding surface plasticity theory with coding. Does anyone have any code (written in MATLAB) for the Bounding Surface Plasticity model? Could you […]
Non convergence problem in abaqus using hpoeca Clay Hypoplasticity in slope model
Yang Xue||Constitutive Modelling|4 |
Views 3,962
hello everyone! based on the strength reduction method in clay hypoplasticity, firstly, I used two steps belong to the static_general, the first step is impose a gravity load, and not […]
Anyone has any reference to writing UMAT file for Poro linear elastic properties or what constitutive equations have to be solved to do the same. Any help would be appreciated […]
Cyclic/monotonic direct shear test (matlab driver)
anis kheffache||Constitutive Modelling|2 |
Views 5,456
Hi everyone, i am trying to simulate DSS/cDSS test in drained/undrained conditions and I was wondering how the constraints matrices should be ? while it is easy to understand how […]
Convergence issue of unload of clay consolidation in Abaqus
Shen Wang||Constitutive Modelling|5 |
Views 5,120
Hello, I was trying to simulate the unloading process of clay consolidation in Abaqus using clay hypoplasticity umat (https://soilmodels.com/download/plaxis-umat-hypoplas-zip/). But I had a convergence issue showing in Fig.1. The model […]
Convergence issue of unload of clay consolidation in Abaqus
Shen Wang||Constitutive Modelling|1 |
Views 3,970
Hello, I was trying to simulate the unloading process of clay consolidation in Abaqus using clay hypoplasticity umat (https://soilmodels.com/download/plaxis-umat-hypoplas-zip/). But I had a convergence issue showing in Fig.1. The model […]
PLAXIS 2D Embedded Pile Row
BENAN ZAHAWI||Constitutive Modelling|0 |
Views 4,648
PLAXIS 2D require a “Lateral Resistance ” for the embedded pile row. The manuals are not very clear as to what the resistance represents? Is it on friction ( similar […]
Cyclic Triaxial Test
Mehdi Joneidi||Constitutive Modelling|2 |
Views 4,458
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
anis kheffache||Constitutive Modelling|2 |
Views 4,027
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
Shen Wang||Finite Elements|4 |
Views 3,679
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
Shen Wang||Constitutive Modelling|5 |
Views 4,455
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
nasim aftahi||Constitutive Modelling|2 |
Views 4,591
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?
Sudipta Bhowmick||Constitutive Modelling|19 |
Views 6,126
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)
David Mašín||Position Announcements|0 |
Views 1,048
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
Osama Dar||Constitutive Modelling|0 |
Views 4,114
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
Majid Fetrati||Laboratory testing|0 |
Views 725
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
Avshalom Ganz||Position Announcements|0 |
Views 1,266
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
muhammad shakeel||Constitutive Modelling|0 |
Views 3,870
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
MOHD SAQIB||Finite Elements|2 |
Views 3,428
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
Abdulaziz Abdelkadr||Finite Elements|0 |
Views 3,222
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
MOHD SAQIB||Finite Elements|1 |
Views 3,263
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
Osama Dar||Laboratory testing|4 |
Views 623
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]
Balaji Bandaru||Constitutive Modelling|0 |
Views 3,841
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
Balaji Bandaru||Constitutive Modelling|1 |
Views 4,006
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
Abulimiti Ayizula||Constitutive Modelling|5 |
Views 5,246
Is there Hardening Soil Model in Abaqus?
Who is Online
No one is online right now
Search SoilModels Website
Recent posts
- UMAT for Creep-SCLAY model. 1.3.2024
- Cyclic tests with Triax element test driver 14.2.2024
- SUMMER SCHOOL ‘Numerical Modelling in Geotechnical Engineering’, Innsbruck – July 22nd-26th, 2024 1.2.2024
- COURSE IN SOIL MODELING – NTNU, Trondheim – October 14th to 18th, 2024 21.12.2023
- MSE walls design in Plaxis 11.12.2023
- sand liquefaction modelling in Anura3D 8.12.2023
- BCV bentonite experimental and modelling datasets 14.11.2023
- Challenges in simulating geomechanical models using Mohr-Coulomb with Tension Cut-Off in Abaqus 20.10.2023
- Analys soil liquefaction with Abaqus under blast load 19.10.2023
- Hardening soil Model UMAT 13.9.2023
- Problem with VUMAT interface 20.8.2023
- UMAT and oneAPI compiler issues. (SOLVED…i hope :p) 5.8.2023
Recent Comments