In this post we will list built-in hypoplasticity formulations in the free Tochnog Professional program. Since these hypoplasticity options are built-in there is no need to link external umat routines. […]
Dear All, We posted a small overview movie of Tochnog Professional in YouTube. For more movies see the complete channel.
After several decades of development we are happy to announce that the Tochnog Professional finite element program has become free. Both for academic and commercial use. We are extremely grateful […]
Where the client was forced to make all his horizontal loaded Dolphins (piles) 10 m longer we could trustworthy proof that this actually was not necessary saving millions of cost […]
On the simulation of the cyclic mobility effect with an ISA -hypoplastic hypoplastic hypoplastic model, is it possible to simulate 3D liquefiable sandy soil by available u-mat file which is […]
Dear all, I recently conducted a numerical simulation of pile-soil interaction. I digged a vertical hole and insert the pile into that with general contact. Due to many reasons, I […]
I am trying to calibrate my sand using Excalibre. I tried some triaxial element tests using Abaqus. However the results are different between Excalibre and Abaqus.
Dear all, I’m trying to model multilayer soil in abaqus. To use the SaniSand umat in model I use the following parameters but no plastic strain at all. The unit […]
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 […]
Dear all, The sand hypoplastic model has been used to simulate the interaction between soil and pile. However, there is a bad convergence in the process of calculation. When I […]
Dear all, When I check the umat file of sand hypoplastic modeling, I find there are two parametesr(p_t(2), bulk_w(15)) without any definitions. Could someone kindly explain the exact meaning for […]
hi, every one i have problem with fortran format my abaqus is 6.14 and this version accept (.for) format for fortran but some subroutines are in (.f ) format is […]
Dear SoilModels community Dear Prof. Masin / all I want to know how HP model considers Ko variation for the following cases: Ko with variation with OCR? Ko determination related […]
Dear Prof David / SOil model community, I am performing coupled consolidation analysis for deep excavation in clay using HP clay model in Plaxis 3D. Performing the undrained analysis, the […]
I am using the mesh-to-mesh solution mapping with MCC model. The element type used is CPE8RP. My initial analysis runs without any issue and when the deformations reach a certain […]
Hello, everyone I am an abaqus user and developer. Recently, I want to simulating the liquefaction phenomenon with abaqus/standard or abaqus/explicit. As I know, this cannot be realized using the […]
Which software has the feature to model soil settlement due water drawdown?
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, […]
Hello all, Could you please anyone provide me umat for Hypoplastic model that used as subroutine in Abqus 6.14. With Best Regards Naif Mohammed
Hi All, Tochnog Professional now has an EasyTochnog extension, see http://www.tochnogprofessional.nl/easy_tochnog/page.php. With simple input data like pile diameter, pile length, slope geometry, sheet pile data, etc. a complete Tochnog Professional […]
Hi All, Starting from Saturday January 26 2019 the Tochnog Professional page moves to http://www.tochnogprofessional.nl Best, Dennis Roddeman
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 […]
Dear all, I’m using the UMAT file in which the hypoplastic model for thermal cycles is implemented. I have done some runs for an axisymmetrical model for a single energy […]
Dear all, I’m using the UMAT file in which the hypoplastic model for thermal cycles is implemented. In the Abaqus input file I have added the two lines necessary to […]
Interface to study soil-structure interaction in Plaxis 3D (Clay Hypoplasticity)
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Hello, I am trying to simulate the behavior of helical anchors (also called screw anchors) using PLAXIS 3D and a clay hypoplasticity constitutive model. The helical anchor shaft is simulated […]
The 2014 Masin hypoplasticity for clays has been implemented in Tochnog Professional under guidance of Dr. David Masin. This implementation includes structure, intergranular strains and visco effects. Extensions to the […]
change the friction angle with the plastic strain in Abaqus following mohr coulomb model.
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Hi, I want to change the friction angle with the plastic strain in Abaqus following mohr coulomb model. Vermeer and de Borst (1984) proposed an equation for frictional hardening and […]
Hi there, I’ve used successfully used SANISAND .dll with Plaxis 2016, but after switching to 2017 and now 2018 the .dll seems not to work (the parameter fields appear without […]
The equations for a vertical cut in cohesive material are given in several publications including Heyman (1973): The stability of a vertical cut (see attachment Equations1.jpeg) and Verruijt (2001) Soil […]
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 […]
The Tochnog Professional finite element program is now available as free version with 100 elements. It can be downloaded without registration from http://www.tochnogprofessional.nl. Several commercial and free pre- and postprocessors […]
Calculation of coordinates of climbing formwork using hypoplasticity and pressuremter tests
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Our article published in the latest issue of Ground Engineering 10/2017. Great combination of cone-pressueremeter-testing (CPM) by FUGRO and advanced 3D Fem modelling by GEOLINK using hypoplastic constitutive equations to […]
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Recent posts
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Intergranular strain concept modification 29.3.2020
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PhD position on thermo-hydro-mechanical coupling in slope stability (Charles University) 26.2.2020
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PhD position at Charles University on experimental investigation of thermally loaded bentonite 24.2.2020
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How to implement this Hypoplastic Interface Model into ABAQUS combined with the existing hypoplastic model subroutine 18.2.2020
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Implimentation of SANISAND constitutive model in ABAQUS/Standard for a soil-monopile interaction 7.2.2020
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