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!
Related Articles
-
Shear modulus degragation
Hello all, I am using the clay hypoplsticity model in Abaqus. As shown in the picture, I have to construct the stiffness desegregation curve to calibrate the R value. Can […] -
Intergranular strain concept modification
Hi all Just a short question on the modification of the intergranular strain concept proposed by Wegener & Herle (2014) to limit strain accumulation. In terms of the numerical implementation […] -
matlab driver
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 […] -
“Warning LNK4210” – hypoplastic clay UMAT
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 test model in Abaqus2020 and applied the umat code (umat_hcea.for). […] -
USDM – Creep -SCLAY1S
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. […] -
Effects of water content in sand in hypoplastic strength parameters
Dear All, I am currently using the hypoplastic model for gran materials from Prof. von Wolffersdorff to simulate soil excavations in a context of large deformations. I have been searching […] -
SANISAND pile-soil-interaction ABAQUS
Hi everyone: I am trying to use SANISAND as the constitutive model of soil, and use ABAQUS software to simulate pile-soil interaction. First step is “Geostatic”, the second step is […] -
Oedometer test simulation with “Sand Hypoplasticity Model” in Plaxis
Hi, I just came across some problems with the implementation of the “Sand Hypoplasticity Model” in Plaxis. I wanted to to perform a simulation of an oedometer test on a […]
Supporting Organisations
Recent posts
-
Presentations from Prague Geotechnical Days 2023 including 29th Prague Geotechical Lecture by Yannis Dafalias 25.5.2023
-
Problem in using Hypoplastic model for sand in Abaqus. 17.5.2023
-
An error in the SANISAND umat runtime 8.5.2023
-
Htypoplastic Model in Miidas GTS NX 25.4.2023
-
set cavitation limit in ABAQUS/STANDARD when using SANISAND umat 2.4.2023
-
FE formulation and software 25.3.2023
-
Multi-objective analysis of the Sand Hypoplasticity model calibration 24.3.2023
-
Problem with SANISAND UMAT 7.3.2023
-
Prague Geotechnical Days 2023 (22nd – 23rd of May) with Prague Geotechnical Lecture by prof. Yannis Dafalias 28.2.2023
-
What is an appropriate damping model for dynamic liquefaction analysis of tailings storage facility in FLAC? 10.2.2023
-
Abaqus vs Plaxis – Local Convergence Tolerances 2.2.2023
-
Zbraslav sand – Cyclic tests by Charles University 17.1.2023
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.