Download package of Clay and Sand hypoplasticity UMAT and Plaxis implementations, including pre-compiled UMAT-Plaxis interface.
Software
Barodesy for clay including intergranular strain and strength reduction (UMAT and Plaxis DLL)

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Download package of clay barodesy with intergranular strain and strength reduction. Including UMAT and Plaxis DLL
Simulation code related to paper "Kadlíček, T. and Mašín, D. (2020). The strength reduction method in clay hypoplasticity. Computers and Geotechnics (in print)".
GroundVib.setup.web.exe
Views 316
Setup file for GroundVib software
Download package of ISA cyclic hypoplasticity model. Contains umats and example Abaqus input files. Umats (ISA+sand hypoplasticity) allow to switch between ISA and classical intergranular strain concept.
Download Package of Matlab Driver

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Simple Matlab element test driver running elasto-plastic and hypoplastic models. Programmed in 2012 by Claudio Tamagnini and David Mašín for the ALERT Olek Zienkiewicz Course.
SANISAND for FLAC3D Download

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Download link for FLAC3D implementation of SANISAND model.
PM4Sand for Plaxis Download

Views 1,240
Download link to Plaxis PM4Sand dll
PM4Silt FLAC Download and documentation

Views 427
Download link for additional references, software manuals and simulation codes of PM4Silt model maintained by the model developers from University of California at Davis.
PM4Sand FLAC Download and documentation

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Download link for additional references, software manuals and simulation codes of PM4Sand model maintained by the model developers from University of California at Davis.
Package contains Plaxis UDSM (dll files only), package documentation in pdf and related journal publication and PhD thesis pdf files. Authors are
researchers from the Graz University of Technology.
Download package of hypoplasticity (sand and clay) for GeoSlope SIGMA/W

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Download package of sand and clay hypoplasticity for GeoSlope SIGMA/W finite element code. Based on umat, comes along with the source code.
Download package of barodesy – ABAQUS umat (source code) and Plaxis dll

Views 1,535
Download package of barodesy model. Contains ABAQUS umat (source code), Plaxis UDSM (dll files only, not source code), package documentation, related journal publications, Abaqus and Plaxis examples.
Download Package of Triax Element Test Driver

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Download package of Triax element test sofware by D. Mašín and co-workers.
UMAT Implementation of Sand Hypoplasticity by UIBK

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Download package contains two umats, one for basic hypoplasticity (von Wolffersdorff, 1996) and the other for hypoplasticity with small strain stiffness (Niemunis and Herle, 1997).
Interface between UMAT (Abaqus/Standard) and VUMAT (Abaqus/Explicit).

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Interface between umat (Abaqus/Standard) and vumat (Abaqus/Explicit) user defined model standards by Bienen et al. (2014).
Download Package of Incremental Driver

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Download package of a Incremental Driver single element program by Niemunis (2007, 2014) for running element tests using constitutive models implemented in umat format.
SANISAND Abaqus UMAT and Plaxis implementations

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UMAT and Plaxis implementations of SANISAND constitutive model by Dafalias and Manzari (2004).
Download Package for Hypoplastic interface model and UMAT – FRIC interface

Views 1,241
Download Package of frictional interface model by Stutz et al. (2016, 2017) for granular soils based on Hypoplasticity including interface between UMAT and FRIC ABAQUS standards.
Clay and Sand hypoplasticity UMAT and Plaxis implementations, including UMAT-Plaxis interface

Views 13,660
Download package of Clay and Sand hypoplasticity UMAT and Plaxis implementations, including pre-compiled UMAT-Plaxis interface.
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Recent posts
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Presentations from Prague Geotechnical Days 2023 including 29th Prague Geotechical Lecture by Yannis Dafalias 25.5.2023
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Problem in using Hypoplastic model for sand in Abaqus. 17.5.2023
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An error in the SANISAND umat runtime 8.5.2023
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Htypoplastic Model in Miidas GTS NX 25.4.2023
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set cavitation limit in ABAQUS/STANDARD when using SANISAND umat 2.4.2023
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FE formulation and software 25.3.2023
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Multi-objective analysis of the Sand Hypoplasticity model calibration 24.3.2023
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Problem with SANISAND UMAT 7.3.2023
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Prague Geotechnical Days 2023 (22nd – 23rd of May) with Prague Geotechnical Lecture by prof. Yannis Dafalias 28.2.2023
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What is an appropriate damping model for dynamic liquefaction analysis of tailings storage facility in FLAC? 10.2.2023
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Abaqus vs Plaxis – Local Convergence Tolerances 2.2.2023
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Zbraslav sand – Cyclic tests by Charles University 17.1.2023
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