Building on a previous double-structure hypoplastic model, a new THM viscohypoplastic bentonite (VIBE) model is presented that incorporates time-dependent behaviour, notably stress relaxation and creep.
Various extensions of the original concept of intergranular strain (IS) according to Niemunis and Herle (1997), to account for small strain effects in constitutive models, have developed in recent years.
This page (which is currently under construction) is intended to provide an overview of existing intergranular strain extensions combined with corresponding implementations.
Dear all, I am attempting to utilize the triax driver for simulating cyclic triaxial tests. However, I have been unable to locate the command for conducting cyclic tests within the […]
A high-cycle explicit model for the accumulation of strain in sand due to small cyclic loading. The dependence of the accumulation rate on stress, void ratio, cyclic history and the type of loading is considered. In particular, the ovality and the polarization of the strain path during a cycle are taken into account.
ALERT doctoral school on constitutive modelling – hands on session triax input files
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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 […]
1. Download install exe (32 or 64 bit) from https://cygwin.com/install.html 2. Choose a mirror site / click Next and select all packages you need for compiling: Type: “gcc” into search […]
A PhD-level course on hypoplastic constitutive modelling intended for both academia and practitioners.
Barodesy is a constitutive model for granular media and does not use standard notations of elasto-plasticity, e.g. yield function, flow rule or plastic potential.
SANISAND is an advanced elasto-plastic model based on a concept of rotational hardening incorporating the effects of fabric-dilatancy.
Sand hypoplastic model is an advanced incrementally non-linear constitutive model for sand, an outcome of an extensive research at Karlsruhe University in 1990's.
Clay hypoplasticity is an advanced incrementally non-linear constitutive model based on critical state soil mechanics developed specifically for simulation of fine-grained materials.
Based on some requests, I share here two presentations on hypoplasticity applications. One is related to simulation of various boundary value problems, the other focuses on simulation of cyclic and […]
A new element test driver named “Triax” has been included into the list of calibration software available at https://soilmodels.com/triax including source code and pre-compiled Windows and Linux executables. I have been using […]
Download package of Triax element test sofware by D. Mašín and co-workers.
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Recent posts
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Animating Soil Mechanics 3.7.2026
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GeoXPM 19.6.2026
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Autumn School in Soil Modelling at NTNU 16.6.2026
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Viscohypoplastic bentonite (VIBE) model 28.5.2026
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Problem in “Hoek Brown Softening” Model 30.4.2026
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XFEM Hydraulic Fracturing in Abaqus – Pore Pressure Not Updating & Extremely Small Time Steps 28.4.2026
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Correct my Plaxis FEM simulation in foundation bearing capacity results 3.4.2026
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mohr coulomb 2D yield surface vs 3D mohr coulomb yield surface 28.2.2026
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Problem with GeoStudio (Seepage) software 16.2.2026
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Prague Geotechnical Days 2026 3.2.2026
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Postdoctoral position at COFS, UWA 28.7.2025
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Hypoplasticity clay in ABAQUS 23.7.2025
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