Recent and Upcoming Conference and Workshop Contributions

2019-4: F.K. Wittel, P.S. Iliev, H.J. Herrmann: Confined comminution of aggregated particles, Particles 2019, Barcelona, Spain (invited session on Fracture and Fragmentation with DEM).

2019-3: P. Grönqist, D. Wood, F.K. Wittel, M. Rüggeberg: Optimization studies of self-shaping mechanisms for achieving double-curved wooden structures, CompWood 2019 June 17-19, Växjö, Sweden.

2019-2: F.K. Wittel, L. Blum, P. Niemz: Numerical Optimization of Glued Laminated Timber with Mixed Species, CompWood 2019 June 17-19, Växjö, Sweden (keynote lecture).

2019-1: F.K. Wittel, P.S. Ilive: Consolidation of Polyhedral Packings due to Grain Fragmentation, CFRAC 2019, June 12-14, Braunschweig (Minisymposium on Discrete models for material failure - MS code: 69 Organized by F. Kun, F. Wittel).

2018-3: P.S. Iliev, F.K. Wittel, H.J. Herrmann: DEM for free-standing Wire Reinforced Jammed Granular Columns, China-Europe Conference on Geotechnical Engineering, 13.-16. August 2018, Vienna, Austria.

2018-2: P. Grönquist, F. Wittel, M. Rüggeberg: Mechanical Analysis of Wooded Bilayer Structures and Novel Application Possibilites in Timber Industry, ASCE Engineering Mechanics Institute Conference 2018, May 29 – June 1 MIT Boston.

2018-1: F.K. Wittel; P. Grönquist, M. Rüggebert, H.J. Herrmann: A quantitative study on residual stresses in wood induced by aqueous adhesives, ECMM-ECFD2018 June 11-15 Glasgow

2017-8: P. Grönquist; F.K. Wittel; M. Rüggeberg: Upscaling of Self-actuated Wooden Bilayers, oral poresentation at GACM Colloquium on Computational Mechanics, 2017, October 11-13 Stuttgart.

2017-7: P.S. Iliev, F.K. Wittel, H.J. Herrmann: Numerical modelling of fiber reinforced jammed granular columns,  Particles 2017 September 26-29, Hannover, Germany.

2017-6: F.K. Wittel; H. Carmona; H.J. Herrmann: DEM Study on the Role of Thermal Mismatch in Multi-phase Particle Fragmentation, Particles 2017 September 26-29, Hannover, Germany.

2017-5: G. Grönquist, M. Rüggeberg; F.K. Wittel: Predicting the Actuation of Large-Scale Smart Wooden Bilayer Systems, 3rd Euro Intelligent Materials 2017 8.6.17 Kiel.

2017-4: M. Rüggeberg; C. Vailati; P. Grönquist; F.K. Wittel: Smart wooden actuators, , 3rd Euro Intelligent Materials 2017 8.6.17 Kiel.

2017-3: F.K. Wittel, K. Melnikov: Failure in Wet granular matter, High-performace multiscale modelling IV, May 30th, Zurich, Switzerland.

2017-2: F.K. Wittel, D. Mora Mendez, H.J. Herrmann: Micro-mechanical mulit-scale models for modified wood, CompWood 2017, June 7-9, Vienna, Austria.

2017-1: S.O. Olaniran, B. Michen, I. Burgert, D. Mora Méndez, F.K. Wittel, M. Rüggeberg: Investigating the micromechanical properties of chemically modified wood of Norway Spruce, oral presentation at IUFRO 2017, Jun3 12-16, Vancouver, BC.

2015-8: K. Melnikov, F.K. Wittel, M. Thielmann, H.J. Herrmann: Micromechanical Model of Wet Granular Material, oral presentation at Particles 2015 - MUMOLADE session, September 28-30 Barcelona, Spain.

2015-7: A. Leonardi, F.K. Wittel, R. Vetter, M. Mendoza, H.J. Herrmann: A fluid-particle model for the impact of debris flow on flexible barriers, oral presentation at Particles 2015 - MUMOLADE session, September 28-30 Barcelona, Spain.

2015-6: K. Melnikov, R. Mani, F.K. Wittel, M. Thielmann, H.J. Herrmann: Pore Scale Model of Two-Phase Flow in Porous Media, poster presentation by K. Melnikov at the 7th International Conference on Porous Media, May 18 - 21, 2015, Padova, Italy.

2015-5: 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, oral presentation by A. Leonardi at European Geosciences Union General Assembly 2015, April 12–17, Vienna, Austria.

2015-4: L.K. Mettler, F.K. Wittel, R.J. Flatt, H.J. Herrmann: Evolution of Strength and Failure of Polymer Fiber Reinforced SCC During Early Hydration, Concreep10, September 21-23, Vienna, Austria.

2015-3: F.K. Wittel, M.M. Hassani, M. Rüggeberg: Smart by nature – New perspectives on wood, DeMEASS VII 2015, October 4-7, Dresden. Download abstract (PDF, 231 KB)

2015-2: F.K. Wittel: Plenary lecture at Particles 2015, September 28-30 Barcelona, Spain. Download abstract (PDF, 11 KB)

2015-1: F.K. Wittel, F. Kun: Organization of Invited Session on "Fracture and Fragmentation with DEM" at Particles 2015, September 28-30 Barcelona, Spain. external page website

2014-9: F.K. Wittel, M. Hassani: Modellierung der Verklebung von Holzverbindungen, Montagskolloquien für die Praxis, 24.11.2014, Zurich.

2014-8: R.Vetter, N. Stoop, F.K. Wittel, H.J. Herrmann, G.Munglani: Download Anisotropic growth of thin shells with subdivision elements (PDF, 284 KB), poster at 11th. World Congress on Computational Mechanics (WCCM XI), July 20 - 25, 2014, Barcelona, Spain.

2014-7: M.M. Hassani, F.K. Wittel, H.J. Herrmann: Prediction of delamination and fracture in adhesive bondlines, International Conference on Wood Science and Engineering September 26-27, 2014, London.

2014-6: F.K. Wittel, M.M. Hassani, M. Rüggeberg: Smart as wood – New perspectives on a natural smart material, “Smart functional materials for shaping our future”, 19.-20.9.2014 Debrecen, Hungary.

2014-5: K. Melnikov, R. Mani, F.K. Wittel, H.J. Herrmann: Granular Matter at High Water Saturation Levels, Alert Workshop 29.9.-1.10.201 Aussois, France, Session 3.

2014-4: M. Hassani, S. Ammann, F.K. Wittel (presenting), H.J. Herrmann, P. Niemz (PI): Reliable Timber and Innovative Wood Products for Structures: Adhesive Bonding of Structural Hardwood Elements. NRP Recource Wood Progress Report Meeting 9.-11.4.2014 Loewenberg, Murten/Morat

2014-3: F.K. Wittel: Particle models for fracture and non-linear mechanics, invited lecture at CSC course on Advanced topics in Particle Based Methods 23.-24.4.2014, Espoo, Finland.

2014-2: joint talk by R. Flatt at: R.K. Mishra, H. Heinz, F. Wittel, H. Herrmann, H. Carmona, M. Sawley, D. Geissbühler, M. Weibel, E. Gallucci, R.J. Flatt: Multi-modelling approach to study the effectiveness of grinding aids, at Cement division meeting of the American Ceramic Society (ACerS)-CD-5.

2014-1: Organization of Hans J. Herrmann's 60th Anniversary International Conference on Dynamic Systems: From Statistical Mechanics to Engineering Applications, January 9-10 2013, Zurich, Switzerland.

2013-14: Leonardi A., Wittel F.K., Mendoza M., Herrmann H.J.: Numerical simulation of debris flows using a discrete element method coupled with a Lattice-Boltzmann fluid, poster presentation, Workshop on Hybrid Particle-Continuum Methods in Computational Materials Physics, 4-7 March 2013, Forschungszentrum Jülich, Germany.

2013-13: Amman S., Hassani M., Wittel F.K., Herrmann H.J., Niemz: Adhesive bonding of structural hardwood elements, poster contribution, Measurement methods and Modelling approaches for predicting desirable future Wood properties, International IUFRO Conference MeMoWood, Octover 1-4 2013, Nancy, France.

2013-12: Hassani M.M., Amman S., Wittel F.K., Niemz P., Herrmann H.J.: Investigation of delamination process in adhesively bonded hardwood elements under changing environmental condition, poster contribution, Measurement methods and Modelling approaches for predicting desirable future Wood properties, International IUFRO Conference MeMoWood, Octover 1-4 2013, Nancy, France.

2013-11: Organization of the invited session: Multiscale Modeling of Landslides and Debris flow, Particles 2013, IIIrd Int. Conf. on Particle Based Methods, September 18-20, 2013, Stuttgart.

2013-10: Lanvermann C., Sanabria S., Wittel F., Niemz P., Schmitt U.: Structure-property relationships - A study on the growth ring scale of Norway spruce, Heritage Wood: Research & Conservation in the 21st Century, October 28-30, Warsaw, Poland.

2013-9:Ammann S., Hassani M.M., Obersriebnig M., Konnerth J., Wittel F., Niemz P.: Delamination Behaviour of Adhesively Bonded Structural Hardwood Elements, International Conference on Wood Adhesives, October 9-11, 2013 Toronto, Ontario Canada.

2013-8: Leonardi A., Wittel F.W., Mendoza M., Herrmann H.J.: Discrete Element Method Combined with a Lattice-Boltzmann Fluid Model for the Simulation of Debris Flows, 24th ALERT Workshop, September 29th to October 5th 2013, Aussois.

2013-7: Leonardi A., Wittel F.W., Mendoza M., Herrmann H.J.: Multiphase debris flow simulations with the Discrete Element Method coupled with a Lattice-Boltzmann fluid, Particles 2013, IIIrd Int. Conf. on Particle Based Methods, September 18-20, 2013, Stuttgart.

2013-6: Carmona H.A., Wittel F.W., Andrade J.S., Herrmann H.J.: DEM simulation of multi-phase particle fragmentation in a granular bed, Particles 2013, IIIrd Int. Conf. on Particle Based Methods, September 18-20, 2013, Stuttgart.

2013-5: Wittel F.K., Herrmann, H.J.: Fatigue particle fragmentation by repeated impact, Particles 2013, IIIrd Int. Conf. on Particle Based Methods, September 18-20, 2013, Stuttgart.

2013-4: Wittel F.K., Hassani, M.M., Herrmann, H.J.: Holzverbund – Möglichkeiten und Grenzen der Modellierung, Montagkolloquien für die Praxis, Verklebung und Einsatz von Laubholz im Ingenieurholzbau, December 9th 2013.

2013-3: Hassani M.M., Ammann S., Wittel F.K., Niemz P., Herrmann H.J.: Investigation of delamination process in adhesively bonded hardwood elements under changing environmental condition. RILEM Conference on Materials and Joints in Timber Structures – recent Advancement of Technology, October 08 – 10, 2013, Stuttgart.

2013-2: Hassani M.M., Ammann S., Wittel F.K., Niemz P., Herrmann H.J.: Rheological Material Model for Wood. Complas XII International Conference on Computational Plasticity, September 3rd-5th, 2013, Barcelona.

2013-1: Wittel F.K., Herrmann H.J.: From Fracture to Fragmentation. Invited talk. International Workshop on Cutting Tool - Soil Interaction SFB 837 July 5th. 2013, Bochum.