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
-
Problems with the UMAT subroutine check_parms_DM of the SANISAND constitutive model
meng xiaowei||Constitutive Modelling|3 |
Views 4,725
Where can I find the source of the content in the picture below in the UMAT subroutine check_parms_DM of the SANISAND constitutive model? -
-
Hypoplastic rate independent and non-linearity
sobhan abedinnejad||Constitutive Modelling|2 |
Views 4,291
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 […] -
Hypoplastic UMAT error ABAQUS
Hashmi Sohawon||Constitutive Modelling|2 |
Views 5,242
Hi all, I wanted to ask if anyone has experienced this error before when running the Hypoplastic UMAT (umat_hcea.for) on Abaqus? “Abaqus Error: The executable standard.exe aborted with system error […] -
Hypoplastcity sand model
Pooja Patil||Constitutive Modelling|11 |
Views 4,796
Not able to run the subroutine ……..error is coming ……UMAT: illegal (negative) actual void ratio detected Can anybody help -
Hypoplastic Model inquire
Mahmoud Hamed||Constitutive Modelling|3 |
Views 4,548
Dear Prof. David Mašín Greetings I would like to discuss with you an issue. I have a problem in my simulation on ABAQUS. The problem in the simulation results is […] -
Convergence issue of unload of clay consolidation in Abaqus
Shen Wang||Constitutive Modelling|1 |
Views 4,356
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 […] -
PM4SAND model
Mohammad Zarrabi||Constitutive Modelling|3 |
Views 4,578
Hi all, I have been trying to code the PM4SAND model for several months, but I faced some problems. I was wondering if there is anyone who worked with this […]
Who is Online
No one is online right now
Search SoilModels Website
Recent posts
-
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
-
Connecting remote sensors to the Plaxis FEM 3D using python 26.7.2024
-
Intergranular Strain Extensions 16.7.2024
-
Abaqus Hypoplasticity Primary Variable Is Not Available 1.7.2024
-
Vumat to calculate excess pore in Coupled Eulerian-Lagrangian ABAQUS 1.7.2024
Recent Comments
- 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
- Anis Kheffache on Problem in using Hypoplastic model for sand in Abaqus.
- Micha Van der Sloot on PM4Sand for Plaxis Download
- Kiruthika Perumal on PM4Sand for Plaxis Download
- Shishir Kumar Sikder Amit on Mohr Coulomb umat in Abaqus
- Zhentao Liu on Hypoplasticity sand convergence issues
- Zhentao Liu on Combining Hypoplastic-sand and Hypoplastic-clay in one UMAT file
- Sumin Song on Clay and Sand hypoplasticity UMAT and Plaxis implementations, including UMAT-Plaxis interface
- KHA DIDJA on Issue in applying SANISAND04 UMAT to Boundary-Value-Problem
- Zhentao Liu on Problem in simulating CPT using SANISAND04
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.