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
-
UMAT and oneAPI compiler issues. (SOLVED…i hope :p)
anis kheffache||Finite Elements|7 |Views 1,703
Dear all, A while ago, a person asked about the hypoplasticity umats, the problem was that the umats were not working when compiled using the oneAPI fortran compiler, an error […] -
An error in the SANISAND umat runtime
Zhentao Liu||Finite Elements|15 |Views 1,851
Dear all I was simulating a pile in a fully drained soil subjected to horizontal loads using ABAQUS (as shown in Figure 1) and noticed from the monitor that the […] -
Modeling of triaxial test sample by using hypoplastic subroutine
Naif Alsanabani||Finite Elements|7 |Views 3,980
I tried to model sample of triaxial test in Abaqus program. I used hypoplastic subroutine. The parameters used in hypoplastic model was Hochstetten sand the given in website “https://web.natur.cuni.cz/uhigug/masin/plaxumat/node5.html”. The […] -
ABAQUS-UMAT Help
Mehmet Gocmez||Finite Elements|2 |Views 711
Hi everyone, I would like to ask if anyone has an example umat file for me to study to work on my master thesis researches. I would like to create […] -
ABAQUS job doesn’t make any increment
Abdullah Al-Rawabdeh||Finite Elements|0 |Views 4,142
Hi, I’m facing a problem with my model. I’m trying to simulate a helical pile in soil. When I create the job, my job doesn’t make any increment and the […] -
Factor of safety in Plaxis 3D using hypoplastic model for sand
Arno Crous||Finite Elements|1 |Views 3,830
I am currently modelling a test conducted in the geotechnical centrifuge facility at HKUST. The test consisted of a sand slope with a rising water table. The slope height in […] -
Modeling of granular soil by using UMAT hypoplastic in Abaqus
Naif Alsanabani||Finite Elements|5 |Views 4,031
Dear all I am using the UMAT of hypoplastic model for simulation soil (3D modeling) under cyclic loading. The analysis was completed at geostatic step. But for consolidation step (soil, […] -
Plaxis 3D Tunnel
Mesut Demir||Finite Elements|0 |Views 3,631
Hi Everybody, I would like to ask an error problem where I am getting while using Plaxis 3D tunnel V 1.2. Previously I was using the software with Windows 7 […]
0 Comments
Who is Online
No one is online right now
Search SoilModels Website
Recent posts
- Degradation ( disturbance ) of hypoplastic clay 23.4.2024
- Degradation ( disturbance ) of hypoplastic clay 23.4.2024
- Paper of Coulomb, C. A. (1773) 15.4.2024
- ABAQUS UMAT of hypoplastic clay model 6.4.2024
- Prague Geotechnical Days 2024 “Geotechnical monitoring” and 30th jubilee Prague Geotechnical Lecture by prof. Eduardo Alonso 5.4.2024
- UMAT for Creep-SCLAY model. 1.3.2024
- Cyclic tests with Triax element test driver 14.2.2024
- SUMMER SCHOOL ‘Numerical Modelling in Geotechnical Engineering’, Innsbruck – July 22nd-26th, 2024 1.2.2024
- COURSE IN SOIL MODELING – NTNU, Trondheim – October 14th to 18th, 2024 21.12.2023
- MSE walls design in Plaxis 11.12.2023
- sand liquefaction modelling in Anura3D 8.12.2023
- BCV bentonite experimental and modelling datasets 14.11.2023
Recent Comments
- Santosh Katuwal on PM4Sand for Plaxis Download
- KHA DIDJA on SANISAND Abaqus UMAT and Plaxis implementations
- Debdip Das on SANISAND Abaqus UMAT and Plaxis implementations
- Ramon Varghese on SANISAND for FLAC3D Download
- Akhtyar Gul Shirzoi on ABAQUS UMAT of hypoplastic clay model
- KHA DIDJA on Animating Soil Models
- Jh Xue on Undrained Tests with Clay Hypoplasticity Intergranular
- Zhentao Liu on Problem in simulating CPT using SANISAND04
- Gertraud Medicus on ABAQUS UMAT of hypoplastic clay model
- Chen Zhiming on Download Package of Charles University Implementation of High Cycle Accumulation Model
- Konstantinos Chatzis on Cyclic tests with Triax element test driver
- Abhay Pratap Singh on Cyclic tests with Triax element test driver
- Giovanni Ciardi on Cyclic tests with Triax element test driver
- Konstantinos Chatzis on Cyclic tests with Triax element test driver
- Ismail Khan on Cyclic tests with Triax element test driver
- Kanika Lamba on Cyclic tests with Triax element test driver
- Arie Koot on How to model the settlement in soil due to water drawdown.
- Konstantinos Chatzis on Cyclic tests with Triax element test driver