Proceedings

37. Download Iliev P.S., Wittel F.K., Herrmann H.J. (2019) Discrete Element Modeling of Free-Standing Wire Reinforced Jammed Granular Columns. In: Wu W. (eds) Desiderata Geotechnica. Springer Series in Geomechanics and Geoengineering. Springer, Cham. (PDF, 702 KB)

36. Download F.K. Wittel, M.M. Hassani, M. Rüggeberg: Smart by Nature - New Perspectives on Wood, Proceedings of VIIth Conference on Design, Modeling and Experiments of Advanced Structures and Smart Systems (DeMEASS), October 4-9 2015, Radebeul, Germany, p. 10-11. (PDF, 231 KB)

35. Download L. Mettler, F.K. Wittel, R.J. Flatt, H.J. Herrmann: Evolution of Strength and Failure of Polymer Fiber Reinforced SCC During Early Hydration, Proceeding of the 10th International Conference on Mechanics ans Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures, Sept.21-23, 2015, Vienna, Austria, p. 550-554. (PDF, 456 KB)

34. A. Leonardi, M. Cabrera, F.K. Wittel, R. Kaitna, M. Mendoza, W. Wu, H.J. Herrmann: The formation of granular fronts in debris flow - A combined experimental-numerical study, Geophysical Research Abstracts Vol. 17, EGU2015-14790, 2015.

33. C. Lanvermann, S. Sanabria, F.K. Wittel, P. Niemz, U. Schmitt: Structure-property relationships - A study on the growth ring scale of Norway spruche, Forestry and Wood Technology, Annals of Warsaw University of Life Sciences, For. and Wood Technol. 83 2013, 185-190.

32. A. Leonardi, F.K. Wittel, M. Mendoza and H.J. Herrmann: Multiphase debris flow simulations with the Discrete Element Method coupled with a Lattice-Boltzmann fluid. In M. Bischoff, E. Ramm, M. Onate, R. Owen, P. Wriggers (Edts) Proceeding of the IIIrd Int. Conf. Particle Methods Particles 2013 in Stuttgart, 276-287.

31. P. Hass, F.K. Wittel, P. Niemz: Failure Mechanism in Adhesive Bonds, Workshop on Micro-characterisation of wood materials and properties, Edinburgh, UK, 24.-26.10.2012

30. F.K. Wittel, M. Mendoza, P. Hass, P. Niemz, H.J. Herrmann: Vorhersage der Klebstoffpenetration in Laubhölzer, Proceedings Bayern Innovativ Kooperationsforum Kleben von Holz und Holzwerkstoffen, 19.-20. Juni 2012 Würzburg, invited talk.

29. F.K. Wittel, P. Hass, M. Mendoza, P. Niemz, H.J. Herrmann: Verklebung von Laubhölzern: Eindringen von Klebstoffen in Buche, Bulletin Holzforschung Schweiz der SAH (2010/2), 1-4 Download artikel (PDF, 601 KB)

28. F.K. Wittel, H.J. Herrmann: Simulation of Failure Processes in Softwood, WE-Heraeus Workshop: Biomedical Modeling and Visualizatiuon: Hierarchical Materials and Multiscale-Modeling in Biology, Aug. 19-20, 2010, Jacobs University Bremen, invited lecture.

27. F.K. Wittel, M. Mendoza, M. Fuhr, F. Gaignat, und H.J. Herrmann: Die Mikroskala von Holz: Numerische Werkstoffforschung jenseits des Kontinuums, Statusseminar der Schweizerischen Arbeitsgemeinschaft für Holzforschung, 28 April, Böttstein, Schweiz (2010) 1 page.

26. F. Gaignat, F.K.Wittel, and H.J. Herrmann: Micro-Mechanical Modeling of Swelling in Wood,IV European Conference on Computational Mechanics (ECCM 2010) Paris, France, May 16-21, (2010) 2 pages.

25. F. K. Wittel and H. J. Herrmann: Micro-Mechanical Modeling of Failure Processes in Wood,
IV European Conference on Computational Mechanics (ECCM 2010) Paris, France, May 16-21, (2010) 2 pages, keynote.

24. F. K. Wittel, K. Kovacs, and H. J. Herrmann: Simulation of Dynamic Crack Propagation in Heterogeneous Media, European Conference on Fracture ECF18, August 30 to September 03 Dresden, Germany (2010) 8 pages.

23. Download P. Hass, F.K. Wittel, M. Stampanoni, A. Kästner, D. Mannes, P. Niemz: 3D Characterization of Adhesive Penetration into Wood by Means of Synchrotron Radiation, in Proceedings of International Conference on Wood Adhesives, Sept. 28-30.2009, Lake Tahoe, Nevada, USA (2010). (PDF, 2.2 MB)

22. S. Wettstein, F.K. Wittel, and H.J. Herrmann: Invasion Percolation on Fracture Networks. 20th Alert Workshop Aussois (2009).

21. F.K. Wittel: Evaluation of Tomography Data - Segmentation. proceedings of Advanced Radiography Methods in Wood Research, PSI Villingen 16.-20. November (2009).

20. F.K. Wittel, H.J. Herrmann: Mechanisms of Fragmentation in Ultrasound Assisted Impact Comminution, in E. Onate and D.R.J. Owen (Edts.). Particle-Based Methods: Fundamentals and Applications. CIMNE, Barcelona (2009) 122-125.

19. E. Masoero, F.K. Wittel, B.M. Chiaia, and H.J. Herrmann: Parametric study of the progressive collapse of 2D framed structures, proceedings for AIMETA, Ancona, Sept. 14-17, (2009) 9 pages. arxiv

18. F.K. Wittel, H.J. Herrmann: Partikelmodelle in Bau- und Umweltwissenschaften, Leitartikel, DBaug Jahresbericht, ETHZ (2009) 10 Seiten. open-access

17. F.K. Wittel, H.J. Herrmann: Partikel Models in Civil and Environmental Engineering, lead article, Yearly Report DBaug, ETHZ, (2009) 10 pages. open-access

16. E. Masoero, F.K. Wittel, H.J. Herrmann, B.M. Chiaia: DEM Simulations of the Progressive Collapse of Framed Structures, Proceedings of the Int. Conf. Fract. 12, Canada (2009), 10 pages. arxiv

15. T. Wallmersperger, F. K. Wittel, M. D'Ottavio, B. Kröplin: Multiscale Modeling of Polymer Gels - Chemo-Electric Model versus Discrete Element Model. Mechanics of Advanced Materials and Structures 15(3-4), (2008), p. 228-234.

14. M. D'Ottavio, F.K. Wittel, B.H. Kröplin: An Open Toolbox for Damage Simulation, 11 pages. external page NDT.net 12 (12/2006)

13. F.K. Wittel, F. Kun, H.J. Herrmann: Damage Simulation of High Performance Fiber Reinforced Concrete, NDT.net 12 (12/2006) 11 pages.external page NDT.net 12 (12/2006)

12. H.J. Herrmann, F.K. Wittel, F. Kun: Fragmentation, in proceedings LAWNP05, Physica A 371, 59-66 (2006).

11. Wallmersperger, T.; Wittel, F.K.; Kröplin, B.H.: Modeling of Polyelectrolyte Gels: A Discrete Element Approach, Proceedings of WCCM VII (2006), 1292.

10. Wallmersperger, T.; Wittel, F.K.; Kröplin, B.H.: Multiscale modeling of polyelectrolyte gels, in Proc. SPIE 6168, Smart Structures and Materials (2006): Bar-Cohen, Y. (Edt.): Electroactive Polymer Actuators and Devices (EAPAD). vol. 6168, 61681H, San Diego (USA), 2006.

9. M. D'Ottavio, F.K. Wittel, J. Reiser: Mechanism Based Toolbox: Prototypical Implementation of Tools, in Busse, G.; Kröplin, B.-H.; Wittel, F.K.: Damage and its Evolution in Fiber Composite Materials: Simulation and Non-Destructive Evaluation, ISD, Stuttgart (2006), p.481-518.external page libri.de

8. F.K.Wittel, M. D'Ottavio: An Open Toolbox for Damage simulation, in Busse, G.; Kröplin, B.-H.; Wittel, F.K.: Damage and its Evolution in Fiber Composite Materials: Simulation and Non-Destructive Evaluation, ISD, Stuttgart (2006), p.475-480.external page libri.de

7. F.K.Wittel, F. Kun, H.J. Herrmann: Particle models: simulation of damage and fracture in composites using a discrete element approach, in Busse, G.; Kröplin, B.-H.; Wittel, F.K.: Damage and its Evolution in Fiber Composite Materials: Simulation and Non-Destructive Evaluation, ISD, Stuttgart (2006), p.425-442. external page libri.de

6. F.K. Wittel, F. Kun, H.J. Herrmann, B.H. Kröplin: Fragmentation on Shell-Like Systems, Proc. of the 4th European Conference on Space Debris (ESA SP-587) 18-20 April (2005), Darmstadt, Germany. Editor: D. Dansey. p 255 ff.

4. H.M. Deuschle, Falk K. Wittel, Bernd-H. Kröplin: Simulation von Spannungoptik im Rahmen der FEM, Tagungsband der 17. deutschsprachigen ABAQUS-Benutzerkonferenz, Nürnberg (2005), Kapitel 2.16.

3. F.K. Wittel, R.C. Hidalgo: Charakterisierung der Schädigungsrelevanz mittels skalenübergreifender Beschreibung der Festigkeitsevolution, Ergebnisbericht SFB381 Projekt C7, Charakterisierung des Schädigungsverlaufes in Faserverbundwerkstoffen mittels zerstörungsfreier Prüfung (2003), S.267-296.

2. F. Kun, F. Wittel: Charakterisierung der Schädigungsrelevanz mittels skalenübergreifender Beschreibung der Festigkeitsevolution, Ergebnisbericht SFB381 Projekt C7, Charakterisierung des Schädigungsverlaufes in Faserverbundwerkstoffen mittels zerstörungsfreier Prüfung (1999), S.343-372.

1. F. Wittel, F. Zimmermann, S. Brückner: Identification of Tether Dynamics by means of Neural Networks during a Deployment Procedure, in Proceedings of the 4th Int. Workshop on Neural Networks in Application, (1999) S. 157-166.