Hello, I am writting to ask how to get the elastic modulus or undrained strength of the soil in the simulation model by using hypoplastic model in clay? Is there any formula that can be calculated from the hypoplastic model parameters, or is there some other way?Thank you so much.
A question about the hypoplastic model in clay
Related Articles
-
CEL analysis using hypo plasticity Vumat
abd Elfattah||Constitutive Modelling|8 |
Views 5,395
Greetings i used interface Vumat with Umat for simulating CEL problem, after 50% of analysis, i got the error as “Excessive incremental rotation of the elements in element set ” […] -
SSE and SPD Mohr Coulomb Crieria
Matías Sáez de Tejada||Constitutive Modelling|1 |
Views 4,986
I have a UMAT of Mohr Coulomb with no hardening, where i have to define SSE (specific strain energy) and SPD (specific plastic dissipation). Any idea? -
abaqus version
sobhan abedinnejad||Constitutive Modelling|3 |
Views 4,359
hi every one i’m using abaqus 2017 and i want to implement Hypo-sand to my Biaxial model (2D) and before all, i linked abaqus and fortran successfully my question is […] -
Cyclic simple shear test simulation with hypoplasticity
Piotr Kowalczyk||Constitutive Modelling|2 |
Views 5,207
Dear All, I am using sand hypoplastic model in my research and I have encountered some problem when looking into cyclic simple shear test in the range of small strains. […] -
-
Shear modulus degragation
Baban Bapir||Constitutive Modelling|1 |
Views 5,105
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 […] -
Papers on Excalibre
David Mašín||Constitutive Modelling|0 |
Views 4,910
Hi all, Details of Excalibre software (https://soilmodels.com/excalibre) functionality and calibration procedure have been published in two papers, which are now available online at the webpages of publisher (https://link.springer.com/article/10.1007%2Fs11440-021-01441-0 and https://link.springer.com/article/10.1007%2Fs11440-021-01435-y). […] -
MSE walls design in Plaxis
Leo Alibert||Constitutive Modelling|2 |
Views 1,361
Hi everyone, this is my first post in this forum. I am collecting initial data on the most appropriate soil model for the analysis of a multitiered MSE wall. I […]
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
Undrained shear strength is calculated using Hypoplastic model by the combination of state dependent variables SDV7, SDV9, SDV15 i.e. Void ration , Effective stress and OCR using equation…using equation
Su=o.18(σ’v)OCR^0.9….. Further the relation between these state dependent variables can be found in the the chapter 6 of the book of Dr. David masin”Modelling of of soil behavior with hypoplastcity’
e=expN−λ∗ln(OCR∗p) −1
Good luck and thank you
Hello Dr. Muhammad Ahmad
Thank you so much for your answer. It is really helpful for me. Could you please tell me where I can find the full meaning of the state dependent variables from SDV1 to SVD 16? I am very appreciate for your help.
Here is the link… Thank you
http://web.natur.cuni.cz/uhigug/masin/plaxumat/node6.html
Many thanks to you !
Hi Muhammad, thanks for replying. And Wenbo: For clarification, the formula for undrained shear strengh (Eq. 6.22 from the book Masin, 2019) is cu=p*M*OCR/4, where M=6*sin phic/(3-sin phic) and OCR=pe/p with pe=exp((N-ln(1+e))/lambda). Elastic modulus is only defined for small strain stiffness version of the model (the one with intergranular strain), where the shear modulus G0=Ag(p/pr)^ng with pr=1 kPa.
Thank you for your clarification Prof. Mašín !
Dear all,
Im simulating an undrained triaxial test in Abaqus, I can get the strain tensor from state variables 1-6, but I don’t know how to get the stress tensor.
shall we calculate it from default the stress components of Abaqus, or we should calculate it based on state variable outputs?