a 2D and 3D non-linear multi purpose finite element program for geotechnical boundary value problems
numgeo at a glance
numgeo features different multi-phase element formulations that can be used for quasi-static as well as dynamic
problems (u-p Elements, u-p-U elements, u-U elements):
numgeo offers a wide variety of sophisticated constitutive soil models:
numgeo uses state-of-the art mortar contact discretisation techniques:
@inproceedings{machaček2023automatic,
title={Automatic Parameter Calibration of Two Advanced Constitutive Models},
author={Machaček, Jan and Siegel, Simon and Staubach, Patrick and Zachert, Hauke},
booktitle={Challenges and Innovations in Geomechanics},
year={2023},
publisher={Springer International Publishing}
}
@article{staubach2023monopile,
title={Monopile installation in clay and subsequent response to millions of lateral load cycles},
author={Staubach, Patrick and Tschirschky, Lisa and Machaček, Jan and Wichtmann, Torsten},
journal={Computers and Geotechnics},
year={2023}
}
@article{staubach2023deep,
title={Deep vibratory compaction simulated using a high-cycle accumulation model},
author={Staubach, Patrick and Kimmig, Ivo and Machaček, Jan and Wichtmann, Torsten and Triantafyllidis, Theodoros},
journal={Soil Dynamics and Earthquake Engineering 166:107763},
year={2023}
}
@article{ machaček2023theory,
title={A theory of porous media for unsaturated soils with immobile air},
author={ Machaček, Jan and Fuentes, William and Staubach, Patrick and Zachert, Hauke and Wichtmann, Torsten and Triantafyllidis, Theodoros},
journal={Computers and Geotechnics 157:105324},
year={2023}
}
@article{staubach2023separating,
title={Separating fluid and solid contact constraints for hydro-mechanically coupled finite elements discretising fluid displacement},
author={Staubach, Patrick and Machaček, Jan},
journal={Computer Methods in Applied Mechanics and Engineering 417:116451},
year={2023}
}
@inproceedings{machaček2023one,
title={One-point integrated hourglass-enhanced u-U elements with mortar fluid-phase contact and Sanisand interface},
author={Machaček, Jan and Staubach, Patrick},
booktitle={Proceedings 10th NUMGE 2023},
year={2023},
publisher={ISSMGE}
}
@inproceedings{brosz2023automatic,
title={Automatic Parameter Calibration of Two Sophisticated Soil Models Based on Monotonic and Cyclic Tests on Sand},
author={Brosz, Frederik and Machaček, Jan and Zachert Hauke},
booktitle={Proceedings 10th NUMGE 2023},
year={2023},
publisher={ISSMGE}
}
@article{ machaček2023entwicklungen,
title={Entwicklungen in der numerischen Modellierung geotechnischer Randwertprobleme},
author={ Machaček, Jan and Staubach, Patrick},
journal={Bautechnik 100:1-12},
year={2023}
}
@article{staubach2022,
title={ A high-cycle accumulation model for clay and its application to monopile foundations},
author={Staubach, Patrick and Machaček, Jan and Tafili, Merita and Wichtmann, Torsten},
journal={Acta Geotechnica},
year={2022}
}
@article{staubach2022,
title={ Novel approach to apply existing constitutive soil models to the modelling of interfaces},
author={Staubach, Patrick and Machaček, Jan and Wichtmann, Torsten},
journal={ International Journal for Numerical and Analytical Methods in Geomechanics},
year={2022}
}
@article{staubach2022mortar,
title={Mortar contact discretisation methods incorporating interface models based on Hypoplasticity and Sanisand: application to vibratory pile driving},
author={Staubach, Patrick and Machaček, Jan and Wichtmann, Torsten},
journal={Computers and Geotechnics},
year={2022}
}
@inproceedings{machaček2022back,
title={Back-calculations of Centrifuge Tests on Pile Groups Subjected to High-cyclic Loading},
author={Machaček, Jan and Brosz, Frederik and Staubach, Patrick and Wichtmann, Torsten and Zachert, Hauke},
booktitle={DFI-EFFC International Conference on Deep Foundations and Ground Improvement: Smart Construction for the Future},
year={2022},
publisher={Deep Foundations Institute}
}
@phdthesis{staubach2022contributions,
title={Contributions to the numerical modelling of pile installation processes and high-cyclic loading of soils},
author={Staubach, Patrick},
school={Lehrstuhl für Bodenmechanik, Grundbau und Umweltgeotechnik, Ruhr-Universität Bochum},
year={2022}
}
@article{staubach2022long,
title={Long-term response of piles to cyclic lateral loading following vibratory and impact driving in water-saturated sand},
author={Staubach, Patrick and Machaček, Jan and Bienen, Britta and Wichtmann, Torsten},
journal={Journal of Geotechnical and Geoenvironmental Engineering},
year={2022}
}
@inproceedings{staubach2022langzeitverhalten,
title={Langzeitverhalten von hochzyklisch beanspruchten Pfahlgründungen unter Berücksichtigung des Installationsprozesses},
author={Staubach, Patrick and Machaček, Jan},
booktitle={37. Baugrundtagung},
year={2022},
publisher={DGGT}
}
@article{machaček2022automatic,
title={On the automatic parameter calibration of a hypoplastic soil model},
author={Machaček, Jan and Staubach, Patrick and Gran-das, Carlos and Wichtmann, Torsten and Zachert, Hauke},
journal={Acta Geotechnica},
year={2022}
}
@inproceedings{staubach2022impact,
title={Impact of the constitutive contact model on the simulation of model tests on monopiles with high-cyclic loading},
author={Staubach, Patrick and Machaček, Jan and Wichtmann, Torsten},
booktitle={20th International Conference on Soil Mechanics and Geotechnical Engineering},
year={2022}
}
@inproceedings{ machaček2021numgeo,
title={numgeo: A finite-element program for the simulation of hydro-mechanically coupled geotechnical processes},
author={ Machaček, Jan and Staubach, Patrick },
booktitle={Fachsektionstagung Geotechnik},
year={2021},
publisher={Deutsche Gesellschaft für Geotechnik e.V. (DGGT)}
}
@article{machaček2021investigation,
title={Investigation of three sophisticated constitutive soil models: From numerical formulations to element tests and the analysis of vibratory pile driving tests},
author={Machaček, Jan and Staubach, Patrick and Tafili, Merita and Zachert, Hauke and Wichtmann, Torsten},
journal={Computers and Geotechnics},
year={2021},
pages={104276}
}
@article{staubach2021large,
title={Large-deformation analysis of pile installation with subsequent lateral loading: Sanisand vs. Hypoplasticity},
author={Staubach, Patrick and Machacek, Jan and Wichtmann, Torsten},
journal={Soil Dynamics and Earthquake Engineering},
year={2021},
pages={106964},
publisher={Elsevier}
}
@article{staubach2021enhancement,
title={Enhancement of a high-cycle accumulation model by an adaptive strain amplitude and its application to monopile foundations},
author={Staubach, Patrick and Machacek, Jan and Tschirschky, Lisa and Wichtmann, Torsten},
journal={International Journal for Numerical and Analytical Methods in Geomechanics},
year={2021},
pages={1-24},
publisher={Wiley}
}
@article{staubach2021back,
title={Back-analysis of model tests on piles in sand subjected to long-term lateral cyclic loading: Impact of the pile installation and application of the HCA model},
author={Staubach, Patrick and Machaček, Jan and Sharif, Raihan and Wichtmann, Torsten},
journal={Computers and Geotechnics},
year={2021},
pages={104018}
}
@article{staubach2021vibratory,
title={Vibratory pile driving in water-saturated sand: Back-analysis of model tests using a hydro-mechanically coupled CEL method},
author={Staubach, Patrick and Machacek, Jan and Josefine Skowronek and Wichtmann, Torsten},
journal={Soils and Foundations},
year={2021},
pages={144-159},
publisher={Elsevier}
}
@phdthesis{machacek2020contributions,
title={Contributions to the Numerical Modelling of Saturated and Unsaturated Soils},
author={Machacek, Jan},
school={Veröffentlichung des Instituts für Bodenmechanik und Felsmechanik am Karlsruher Institut für Technologie (KIT)},
year={2020}
}
@inproceedings{staubach2020validierung,
title={Validierung eines hochzyklischen Akkumulationsmodells anhand von Modellversuchen an Monopiles mit einer großen Anzahl an Belastungszyklen},
author={Staubach, Patrick and Machacek, Jan and Wichtmann, Torsten},
booktitle={Leipziger Kolloquium Forschung in der Geotechnik},
year={2020},
publisher={Hochschule für Technik, Wirtschaft und Kultur Leipzig}
}
@inproceedings{staubach2019einfluss,
title={Einfluss der Relativbeschleunigung bei dynamischer Beanspruchung von Mehrphasenmedien am Beispiel der Vibrationsrammung},
author={Staubach, Patrick and Machaček, Jan},
booktitle={Fachsektionstagung Geotechnik},
year={2019},
pages={340-345},
month={10},
publisher={Deutsche Gesellschaft für Geotechnik e.V. (DGGT)}
}
Jan Machacek started the numgeo project in early 2017 during his time as a PhD researcher. Patrick Staubach joined the development of numgeo in 2018. Since then, numgeo is our joined effort to combine advanced element formulations and sophisticated constitutive models for the simulation of geotechnical boundary value problems. In the meantime, we are happy to have the active support in the development of new features in numgeo from: Merita Tafili, Antonia Nitsch and Christoph Schmüdderich