Hi,
I am going to use the usdfld to function the density of sand changing due to confining pressure. I am not sure Abaqus will call the usdfld for every iteration or every step. I read the Abaqus user-defined field manual, but the wording is not clear. Anyone please help to answer my question. Thank you!
Abaqus user defined field
Related Articles
-
Input files for element tests for hypoplastic clay/sand UMAT
Juan Tello||Constitutive Modelling|0 |
Views 4,237
I’m interested in using the model for simulating excavations in clay, where the small strain modulus is important, and the analysis has to be transient consolidation. It would be helpful […] -
Constitutive Model for clayey sand Soils Considering the Effect of Intergranular Physicochemical Forces
Mehdi Ghatei||Constitutive Modelling|0 |
Views 4,459
Hi all, I’m doing some experimental work to investigate the salinity effect on clayey sand behaviour. Is there any constitutive model considering the physicochemical forces for such materials? Regards, Mehdi -
Hypoplastic Intergranular vs Triaxial Data
Hashmi Sohawon||Constitutive Modelling|2 |
Views 4,526
Hi David, I am trying to reproduce some Triaxial data from Coop et al. (1995) using the Hypoplastic Model with Intergranular Strain Concept on Triax. So far, I cannot get […] -
Hypoplastic rate independent and non-linearity
sobhan abedinnejad||Constitutive Modelling|2 |
Views 4,347
Dear all I’m studying hypo-plastic constitutive law from beginning concepts I traced concepts successfully until i faced **rate independent topic** i read this topic in the prof. Wolfgangs paper (hypo-plasticity […] -
NorSand model for cyclic triaxial testing
A S M RIYAD||Constitutive Modelling|1 |
Views 7,832
Hi altruists, Hope all of you are doing well. I am looking for literature on the NorSand model, which considers the drained cyclic triaxial testing behavior. I have found a […] -
Question about Interface between UMAT and VUMAT
Sina Niazi||Constitutive Modelling|1 |
Views 4,780
Hello, I read the research report and the FORTRAN code available at https://soilmodels.com/download/vumat_umatinterface-zip/. It sounds quite interesting but I have a couple of questions about the FORTRAN code: 1- Did […] -
Hypoplastic model for Granular soil
Naveen Meena||Constitutive Modelling|5 |
Views 5,466
Hello everyone, Could you please anyone tell me that how I can define the hypoplastic constitutive model for granular soil in ABAQUS 6.13. With Regards, Naveen. -
ExCalibre Automatic Calibration
Marco Hofer||Constitutive Modelling|4 |
Views 4,469
Hello all, According to my last post some weeks ago I now have translated the laboratory data from engineering strain to true strain with the following formula: epsilon(true)=ln(1+epsilon(engineering)). I compared […]
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
Usdfld is called every iteration (standard) and every time increment (explicit).
Dear Aire
Thank you for your reply.
I have two more questions. Hope you can help.
1. When we tabular the values (for example Fiction angle and dilation angle are functioning by confining pressure and volumetric strain), do we need to write any code (such as “if-else”) to let Abaqus understand the corresponding limits) ? If not, is this Abaqus will automatically interpolate the value from the FV(1) and FV(2) in the input table.
2. What is the best method to examine Abaqus results are resulting by USDFLD subroutine
Thank you in advance and look to hear from you soon.