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 is provided by Pro Masin on this website (umat_hcea.for). Figure 1 shows the parameters that I set in the model based on the link ‘https://web.natur.cuni.cz/uhigug/masin/plaxumat/node6.html’, but there is no result or error in the calculation, as shown in Figure 2. Could you please tell me what is the possible reason for this problem?
Tags: clay hypoplasticity; abaqus; umata question on the clay hypoplasticity model with Abaqus umat
Related Articles
-
Consolidation analysis using HP clay model in Plaxis
muhammad shakeel||Finite Elements|1 |
Views 4,509
Dear Prof David / SOil model community, I am performing coupled consolidation analysis for deep excavation in clay using HP clay model in Plaxis 3D. Performing the undrained analysis, the […] -
PM4Silt software
Daniel Valencia||Finite Elements|5 |
Views 3,904
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. -
Vibration foundation behavior
Naif Alsanabani||Finite Elements|0 |
Views 5,098
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 […] -
Micropiles load tests database
Majd Abou Alhaija||Finite Elements|0 |
Views 4,160
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, […] -
How to model the settlement in soil due to water drawdown.
Guru Panda||Finite Elements|5 |
Views 6,026
Which software has the feature to model soil settlement due water drawdown? -
Boundary Conditions of Masin 2005 Paper for clay hypoplasticity
Shen Wang||Finite Elements|4 |
Views 4,191
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, […] -
new hypoplasticity laws in Tochnog Professional
dennis roddeman||Finite Elements|1 |
Views 3,759
The 2014 Masin hypoplasticity for clays has been implemented in Tochnog Professional under guidance of Dr. David Masin. This implementation includes structure, intergranular strains and visco effects. Extensions to the […] -
UMAT code for Unsaturated soil modes
Arghya Das||Finite Elements|1 |
Views 4,674
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 […]
Who is Online
No one is online right now
Search SoilModels Website
Recent posts
-
Drucker-Prager Cap 29.5.2025
-
Abaqus RITSS with hypoplastic 9.4.2025
-
Fellin UMAT subroutine 2.4.2025
-
Hypoplasticity clay for triaxial compression in abaqus 26.3.2025
-
Abaqus RITSS methon for LDFE analysis with hypoplastic 17.3.2025
-
Request for VUMAT Implementation of Mohr-Coulomb, Drucker-Prager, or Drucker-Prager Cap 28.2.2025
-
Suggestions for an Advanced Constitutive Model in FEM-Based Dynamic Slope Stability Analysis 12.2.2025
-
Hardening Soil or Hardening Soil-Small umat in Abaqus 2.1.2025
-
hypoplastic interface 11.12.2024
-
Triaxial Test Driver SANISAND 30.10.2024
-
REQUEST FOR EXPRESSIONS OF INTEREST (REOI) FOR PROJECT IN CONSTITUTIVE MODELLING 23.10.2024
-
Programme of the ALERT Olek Zienkiewicz school on Constitutive Modelling of Geomaterials, February 3 to 7, 2025, Prague, Czech Republic 11.10.2024
Recent Comments
- Shuhan Cao on Hardening Soil or Hardening Soil-Small umat in Abaqus
- Kuikui Guigui on Hypoplastic Interface Model (Stutz et al., 2016)
- Kuikui Guigui on Download Package for Hypoplastic interface model and UMAT – FRIC interface
- Francisco José Mendez on Programme of the ALERT Olek Zienkiewicz school on Constitutive Modelling of Geomaterials, February 3 to 7, 2025, Prague, Czech Republic
- Francisco José Mendez on REQUEST FOR EXPRESSIONS OF INTEREST (REOI) FOR PROJECT IN CONSTITUTIVE MODELLING
- Lars Vabbersgaard Andersen on GroundVib.setup.web.exe
- Maria Manakou on GroundVib.setup.web.exe
- Jay Chou on Abaqus RITSS methon for LDFE analysis with hypoplastic
- Tongyu Di on Abaqus RITSS methon for LDFE analysis with hypoplastic
- Dingxin Zhang on Errors of sand hypoplastic model with Abaqus Vumat
- Linares De Castro on GroundVib.setup.web.exe
- Chris Eskandari on Drucker Prager Cap Hardening Model
- Hu Shihong on SANISAND for FLAC3D Download
- Ulas Cilingir on SANISAND for FLAC3D Download
- Pouya Zahedi on UMAT Code for Modified Cam Clay model
- Xiuzhe Wang on Hypoplasticity sand convergence issues
- Zheng Wanying on Example of FLAC3D data file
- Zheng Wanying on SANISAND for FLAC3D Download
it does not look like a warning of hp_umat.
it’s probably from another abaqus material
yeah, I set another material in this model that led to this warning which disappeared after deleting this material .
Hi Tao Zhu, try to define 20 material-parameters instead of 29 (for PLAXIS) and 16 state-variables (depvar). I already have used this model with Abaqus. The model was running perfectly.
Thanks for your advice. I have defined 20 material-parameters instead of 29, but it doesn’t work and the error is ‘User subroutine umat is missing’. There should be no problem with the path of the user subroutine file. Could you please tell me what is the possible reason for this problem?
I read the umat subroutine ‘umat_hcea.for’ and I think the number of the material-parameters should be 22—alpha_power=parms(21),avoid=props(22).
However the sand model with ‘umat.for’ can run perfectly… I’m really confused that the clay model aborted with the error ‘User subroutine umat is missing’ but the sand model can run successfully.
Dear Tao,
I guess the issue is simply to solve. Open the umat_hcea.for with your favorite text/code editor and change the name from ” subroutine umat_hcea(…” to ” subroutine umat(…”.
best regards,
Hans
Dear Hans, Thank you very much! It really works!