Dear all,
I have a question about Hypoplasticity for sand model, i am having trouble to understand about how to calibrate the mr parameter ? Since no formula is provided relationg shear Stiffness G0 to mr, should the calibration be done by simulating triaxial test and reading shear stiffness in a q vs eps_s space ?
Related Articles
-
Getting started with UMAT for Hypoplastic clay model in ABAQUS
Hello All, I am getting started with implementing UMAT for soil model in ABAQUS. I am planning to use Hypoplastic clay constitutive soil model to simulate the triaxial tests. I […] -
Question on the Matlab driver – model hypo Cam Clay
As a beginner to soil constitutive modelling, I am learning the hypoplastic models by reading the matlab drivers. I am confused with the matlab file f_hyp.m in the model hypo_camclay. […] -
Shear Stiffness Calculation for Hypoplastic Model
Hi David, I have reproduced some single elements test on ABAQUS using the UMAT to compare with Triax Hypoplasticity. So far, my stiffness curve (q vs ea) and my stress […] -
Cyclic simple shear test simulation with hypoplasticity
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. […] -
Soft soil model vs Soft soil creep model
Soft soil and soft soil creep model both include time while performing the analysis. What is the difference between both of them. -
How to implement this Hypoplastic Interface Model into ABAQUS combined with the existing hypoplastic model subroutine
Hello: I’m a post-doc at the University of Nottingham, and I’m using the hypoplastic model to simulate the centrifuge tests we did. The research area is related to soil-pile interaction. […] -
The GA-cal software for the automatic calibration of soil constitutive laws
I am happy to announce that our pre-print paper, “The GA-cal software for the automatic calibration of soil constitutive laws: a tutorial and a user manual”, is available on researchgate […] -
PLAXIS 2D Embedded Pile Row
PLAXIS 2D require a “Lateral Resistance ” for the embedded pile row. The manuals are not very clear as to what the resistance represents? Is it on friction ( similar […]
Supporting Organisations
Recent posts
-
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
-
New features in Excalibre 17.1.2023
-
Sanisand 13.1.2023
-
SaniSand Model in Plaxis 3D 9.12.2022
-
The GA-cal software for the automatic calibration of soil constitutive laws 2.12.2022
-
Abaqus OneAPI Compiler 10.11.2022
Hi Anis, yes, there is no formula for mr in sand hypoplastic model. You have to run the simulation of triaxial test, read shear modulus from the output, compare it with your experimental data and update parameters by trial and error procedure. Regards David
Thanks alot Professor.