Prof. Dr.-Ing. habil. Andrzej Niemunis

Arbeitsgebiete

  • Stoffgesetze
  • Mikrostruktur von Bodenmaterial
  • Zyklische Belastung von Boden
  • Viskosität von Geomaterialie

 

Arbeitskreise, besondere Zuständigkeiten

  • Sprecher der Forschungsgruppe "Stoffgesetze und Numerik für Geomaterialien"

Publikationen


2021
  1. Investigations on the Erasing of Cyclic Preloading History by Monotonic Deformations
    Wappler, A.; Knittel, L.; Niemunis, A.; Stutz, H. H.
    2021. Alert Geomaterials Workshop (2021), Aussois, Frankreich, 27.–29. September 2021 
2019
  1. Essential Concepts of Neohypoplasticity
    Niemunis, A.; Grandas Tavera, C. E.
    2019. China-Europe Conference on Geotechnical Engineering, 2018; Vienna; Austria; 13 August 2018 through 16 August 2018, 132–142, Springer. doi:10.1007/978-3-030-14987-1_16
2017
  1. Computer Aided Calibration, Benchmarking and Check-Up of Constitutive Models for Soils. Some Conclusions for Neohypoplasticity
    Niemunis, A.; Grandas-Tavera, C. E.
    2017. Holistic Simulation of Geotechnical Installation Processes : Theoretical Results and Applications. Ed.: T. Triantafyllidis, 168–192, Springer International Publishing. doi:10.1007/978-3-319-52590-7_7
2016
  1. Peak stress obliquity in drained and undrained sands. Simulations with neohypoplasticity
    Niemunis, A.; Tavera, C. E. G.; Wichtmann, T.
    2016. Lecture notes in applied and computational mechanics, 80, 85–114. doi:10.1007/978-3-319-23159-4_5
2015
  1. Improved simplified calibration procedure for a high-cycle accumulation model
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2015. Soil Dynamics and Earthquake Engineering, 70, 118–132. doi:10.1016/j.soildyn.2014.12.011
2013
  1. Separation of time scale in the HCA model for sand
    Niemunis, A.; Wichtmann, T.
    2013. XVI French-Polish Colloquium of Soil and Rock Mechanics. Multiscale Modelling in Soil and Rock Mechanics Montpellier, 8-10 July 2013 
  2. On the "elastic stiffness" in a high-cycle accumulation model - Continued investigations
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2013. Canadian Geotechnical Journal, 50 (12), 1260–1272. doi:10.1139/cgj-2013-0037
2011
  1. Residual deformations due to long-time cyclic loading with two dimensional strain loops
    Poblete, M.; Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2011. Fifth International Conference on Earthquake Geotechnical Engineering, Santiago, Chile, Januar 2011 VolltextVolltext der Publikation als PDF-Dokument
  2. Prediction of drained and undrained cyclic behaviour of a fine sand using a high-cycle accumulation model
    Wichtmann, T.; Rojas, B.; Niemunis, A.; Triantafyllidis, T.
    2011. Fifth International Conference on Earthquake Geotechnical Engineering, Santiago, Chile, Januar 2011 
2010
  1. Application of a high-cycle accumulation model for the prediction of permanent deformations of the foundations of offshore wind power plants
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2010. Frontiers in Offshore Geotechnics II: Proceedings of the 2nd International Symposium on Frontiers in Offshore Geotechnics, Perth, Australia, 8-10 November 2010. Ed.: S. Gourvenec, 635–640, CRC Press 
  2. Simplified calibration procedure for a high-cycle accumulation model based on cyclic triaxial tests on 22 sands
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2010. Frontiers in Offshore Geotechnics II: Proceedings of the 2nd International Symposium on Frontiers in Offshore Geotechnics, Perth, Australia, 8-10 November 2010. Ed.: S. Gourvenec, 383–388, CRC Press 
  3. Stochastische Modellierung von Setzungen
    Poblete, M.; Wichtmann, T.; Niemunis, A.
    2010. Workshop "Gründung von Offshore-Windenergieanlagen", Karlsruhe, Februar 2010. Hrsg.: T. Triantafyllidis, 99–112, Karlsruher Institut für Technologie (KIT) 
  4. Recent improvements of a high-cycle accumulation model for sand
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2010. Workshop "Gründung von Offshore-Windenergieanlagen", Karlsruhe, Februar 2010. Hrsg.: T. Triantafyllidis, 35–47, Karlsruher Institut für Technologie (KIT) VolltextVolltext der Publikation als PDF-Dokument
  5. Stress- and strain-controlled undrained cyclic triaxial tests on a fine sand for a high-cycle accumulation model
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2010. Proceedings of the fifth International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, San Diego, USA, 24. - 29. May 2010 
  6. Strain accumulation in sand due to drained cyclic loading: On the effect of monotonic and cyclic preloading (Miner’s rule)
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2010. Soil Dynamics and Earthquake Engineering, 30 (8), 736–745. doi:10.1016/j.soildyn.2010.03.004
  7. On the "elastic" stiffness in a high-cycle accumulation model for sand: a comparison of drained and undrained cyclic triaxial tests
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2010. Canadian Geotechnical Journal, 47 (7), 791–805. doi:10.1139/T09-142
  8. Prediction of permanent deformations in pavements using a high-cycle accumulation model
    Wichtmann, T.; Rondón, H.; Niemunis, A.; Triantafyllidis, T.; Lizcano, A.
    2010. Journal of Geotechnical and Geoenvironmental Engineering, 136 (5), 728–740. doi:10.1061/(ASCE)GT.1943-5606.0000275
  9. On the determination of a set of material constants for a high-cycle accumulation model for non-cohesive soils
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2010. International Journal for Analytical and Numerical Methods in Geomechanics, 34 (4), 409–440. doi:10.1002/nag.821
2009
  1. Validation and calibration of a high-cycle accumulation model based on cyclic triaxial tests on eight sands
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2009. Soils and Foundations, 49 (5), 711–728. doi:10.3208/sandf.49.711
  2. Die an den Fundamenten rütteln: (Langzeitverformungen bei Offshore-Windenergieanlagen)
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2009. RUBIN. Wissenschaftsmagazin der Ruhr-Universität Bochum, Sonderheft der Ruhr - Universität Bochum, 19 (Sonderheft), 14–21 
  3. Examples for the prediction of settlement due to polycyclic loading
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2009. Lifetime-oriented structural design concepts. Ed.: F. Stangenberg, Chapter 4.6.6., Springer Verlag 
  4. Stratagy for polycyclic loading of soil
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2009. Lifetime-oriented structural design concepts. Ed.: F. Stangenberg, Chapter 4.2.8., Springer Verlag 
  5. A high cycle model for soils
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2009. Lifetime-oriented structural design concepts. Ed.: F. Stangenberg, Chapter 3.3.3., Springer Verlag 
  6. High-cycle laboratory tests on soils
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2009. Lifetime-oriented structural design concepts. Ed.: F. Stangenberg, Chapter 3.2.2., Springer Verlag 
  7. Accumulation in soils due to cyclic loading: a deteioration phenomenon?
    Triantafyllidis, T.; Wichtmann, T.; Niemunis, A.
    2009. Lifetime-oriented structural design concepts. Ed.: F. Stangenberg, Chapter 3.1.3., Springer Verlag 
  8. Multidimensional Amplitude for soils under cyclic loading
    Wichtmann, T.; Niemunis, A.; Triantafyllidis, T.
    2009. Lifetime-oriented structural design concepts. Ed.: F. Stangenberg, Chapter 2.5.2., Springer Verlag 
  9. Settlement due to cyclic loading
    Triantafyllidis, T.; Wichtmann, T.; Niemunis, A.
    2009. Lifetime-oriented structural design concepts. Ed.: F. Stangenberg, Chapter 2.5.1., Springer Verlag 
2000
  1. The consistency conditions for density limits of hypoplastic constitutive law
    Niemunis, A.; Nuebel, K.; Karcher, C.
    2000. Task quart. 4 (2000) S. 409-420 
1997
  1. Hypoplastic model for cohesionless soils with elastic strain range
    Niemunis, A.; Herle, I.
    1997. Mech. of cohesive-frictional mater. 2 (1997) S. 279-299 
  2. Prediction and control of ground displacement due to open pit mining
    Gudehus, G.; Tejchman, J.; Huegel, H.; Niemunis, A.; Pierschke, K. J.
    1997. In: Proceedings of the 14th International Conference on Soil Mechanics and Foundation Engineering, ICSMFE, Hamburg 1997. Vol. 3. Brookfield 1997. S. 1589 
1996
  1. Viscous behaviour of soil under oedometric conditions
    Niemunis, A.; Krieg, S.
    1996. Can. geotech. j. 33 (1996) H. 1 S. 159-168 
  2. Vorhersage und Steuerung von Bodenverformungen infolge Tagebauaktivitäten
    Gudehus, G.; Huegel, H. M.; Niemunis, A.; Pierschke, K.-J.
    1996. In: Vorträge. Baugrundtagung 1996, Berlin. S. 361-370 
1995
  1. On the estimation of the amplitude of shear strain from measurements in situ
    Niemunis, A.
    1995. Soil dyn. and earthquake engng. 14 (1995) S. 1-3 
1994
  1. Numerical simulation of stress-strain behaviour of peat for biaxial deformations at plane strain
    Topolnicki, M.; Niemunis, A.
    1994. In: Advances in understanding and modelling the mechanical behaviour of peat. Ed.: E. den Haan. Rotterdam 1994 
  2. Viscoplastic 1-D model for soils. [in Polish]
    Niemunis, A.
    1994. In: Geotechnika w inzynierii wodnej i ladowej. Materialy Jubileuszowej Sesji Naukowej Profesora E. Dembickiego. Ed.: B. Zadroga. Gdansk 1994 
  3. Beyond invertibility surface in granular materials
    Wu, W.; Niemunis, A.
    1994. In: Proceedings of the 3rd International Workshop on Localisation and Bifurcation Theory for Soils and Rocks, Aussois, France 1994. Rotterdam 1994. S. 113-126 
1993
  1. Visco-hypoplastic models for cohesive soils
    Niemunis, A.; Wu, W.; Bauer, E.; Hede, I.
    1993. In: Modern approaches to plasticity. Ed.: D. Kolymbas. Amsterdam 1993. S. 365 - 384 
  2. Hypoplasticity versa elastoplasticity, selected topics
    Niemunis, A.
    1993. In: Modern approaches to plasticity. Ed.: D. Kolymbas. Amsterdam 1993. S. 277 - 308