Dear concern,
Recently i have modelled the soil pile interaction using Abaqus CEL method. The hypoplastic behavior of the soil is model using user subroutine VUMAT. The properties of the hypoplastic sand are attached. Thanks to Dr. David Mason and all other who have contributed in developing this user subroutine along with explicit interface.
i have applied an initial stress field of 0.17 MPa and the vertical length of the soil model is 9.5 meter. An initial vertical displacement of 2. meter is applied to the pile with step time of 1 sec. in in the next phase a load of 250 KN is applied with step time of 0.1 sec. The the problem is the stress on the soil around the pipe start decreasing as the pile touches the soil and then gradually reduced to zero. The vertical displacement is applied using 50 stress increments,.
The problem is the soil elements around the pile cannot withstand the load and deformed excessively. Is this issue related to my material properties or vertical length of the model is not enough to support the initial vertical consolidation. i have attached the picture of sand deformation. Waiting for the kind assistance. Thank you
Interpreting results of sand hypoplastic model with Abaqus VUMAT
Related Articles
-
Hypoplastic rate independent and non-linearity
sobhan abedinnejad||Constitutive Modelling|2 |
Views 3,795
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 Model for Clays (Masin): Ag, ng or Gvh, n
Fernando Sarabia||Constitutive Modelling|1 |
Views 4,942
Dr. Masin I have downloaded the most recent dll for Plaxis that includes the HypoPlastic model for Clays that you developed. I see two new parameters (Gvh0 and n), both […] -
MatLab m.file
Ala Aljorany||Constitutive Modelling|6 |
Views 5,157
Hi everyone, I’m trying to simulate a triaxial test by using Matlab, adopting the sand hypoplasticity model with strain softening but so far couldn’t succeed. Would anyone help me with […] -
Setting of Kw for Hypoplastic Clay UDSM in Plaxis
Joel Tan||Constitutive Modelling|2 |
Views 4,091
Prof. David Masin, I am posting the queries I have emailed you earlier which you have answered and therefore I am posting it here as per your request. I wish […] -
Htypoplastic Model in Miidas GTS NX
Kassem Dib||Constitutive Modelling|6 |
Views 2,128
Hello.. I am defining the hypoplastic parameters for Karlsruhe sand (found in a paper) using MIDAS GTS NX. In the software the a requesting (in addition of parameters) the number […] -
Modelling Rate-dependent behaviour of clay [Urgent]
Balaji Bandaru||Constitutive Modelling|0 |
Views 3,734
Using PLAXIS, how to model rate dependent behavior of clay. This is to show the viscous behavior of the soil. Thank you in advance -
ExCalibre – Definiton of q
Manuel Winkler||Constitutive Modelling|3 |
Views 4,000
Hello, I am performing calibration trials for the hypoplastic sand model with the aid of ExCalibre and i was wondering how the deviatoric stresses q for the triaxial test input […] -
ALERT doctoral school on constitutive modelling – hands on session triax input files
David Mašín||Constitutive Modelling|0 |
Views 4,175
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 […]
Who is Online
No one is online right now
Search SoilModels Website
Recent posts
-
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
-
Oedometric Test Soil Test Plaxis 21.7.2023
-
Problem in simulating CPT using SANISAND04 10.7.2023
-
Problem with UMAT for clay hypoplasticity. Program exiting. 30.6.2023
-
Example of FLAC3D data file 10.6.2023
-
sigini ans sdvini subroutine example for soil model in Abaqus 6.6.2023
Recent Comments
- Nikolay Suyo Calla on Hardening soil Model UMAT
- Johan Clausen on Challenges in simulating geomechanical models using Mohr-Coulomb with Tension Cut-Off in Abaqus
- Zhenyu Liu on Problem in using Hypoplastic model for sand in Abaqus.
- Dorsa Shadlou on SANISAND for FLAC3D Download
- Shuo Feng on Download Package of Matlab Driver
- Ajay Jatoliya on SANISAND for FLAC3D Download
- Isma Khabis on Hardening soil Model UMAT
- Anis Kheffache on Hardening soil Model UMAT
- Isma Khabis on Hardening Soil Model in Abaqus
- Fatemeh Safari on Matlab Driver
- KF JIAO on SANISAND Abaqus UMAT and Plaxis implementations
- Abdiel Ramon Leon Bal on Problem in simulating CPT using SANISAND04
- An Zhanng on Problem in simulating CPT using SANISAND04
- Giovanni Ciardi on UMAT and oneAPI compiler issues. (SOLVED…i hope :p)
- Anis Kheffache on UMAT and oneAPI compiler issues. (SOLVED…i hope :p)
- Giovanni Ciardi on UMAT and oneAPI compiler issues. (SOLVED…i hope :p)
- Anis Kheffache on UMAT and oneAPI compiler issues. (SOLVED…i hope :p)
- Giovanni Ciardi on UMAT and oneAPI compiler issues. (SOLVED…i hope :p)
Dear Arslan,
You should define the appropriate number of state variables (depvar), please look into the description of the VUMAT interface, besides you need the definition of the parameter 16 in the hypoplastic model, which is the initial void ratio.
Hello, I am learning the penetration simulation of spudcan in hypoplastic soil recently, can you share the cae or inp file of this model for me to learn,my mail address is wdjmcyq@163.com
thank you very much!