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Dr. rer. nat. habil. Heiko Herrmann

start Physik Projekte Publikationsliste Kontakt Impressum

[1] Alexander von Humboldt Foundation. Continuum mechanics with internal variables, 4/2008-3/2012. Feodor Lynen Fellowship.
Das beantragte interdisziplinäre Projekt beschäftigt sich mit der Weiterentwicklung von Methoden zur Beschreibung komplexer Materialien in der Theoretischen Kontinuumsphysik und Thermomechanik. Insbesondere sollen komplexe Materialien, wie Flüssigkristalle und mikrostrukturierte Festkörper, im Rahmen der mesoskopischen Kontinuumsphysik und der Kontinuumsmechanik mit inneren Variablen behandelt werden. Der derzeitige Stand beider Theorien erlaubt keine Aussage darüber, welche Theorie die geeignetere ist. Dies soll in diesem Projekt geändert werden, dazu ist eine Weiterentwicklung beider Theorien nötig, sowie die Anwendung auf Beispielprobleme. Letzteres soll numerisch durch Anwendung einer Finite-Elemente-Methode bzw. der Finite-Volumen-Methode geschehen. Dazu muß auf mathematischer Seite die Netzgenerierung für hochdimensionale Räume und Produkträume entwickelt bzw. verbessert werden.

[2] EU FP7 Marie-Curie ERG. Estwave (educational, scientific and technological aspects of mesoscopic continuum physics for waves in complex materials), 4/2009-3/2012. Budget: 45000 Euro.
The central topic of this proposal is Mesoscopic Continuum Physics, a theory which is situated between microscopic description which focusses on the individual particle and uses statistical methods and macroscopic phenomenological continuum mechanics, which usually does not take into account microstructure. Mesoscopic Continuum Physics combines aspects of both, it uses the continuum point of view and includes the distribution function as a statistical element. The mesoscopic continuum theory had been developed in the field of liquid crystals, but since then has been successfully applied to theoretical description of granular media and has also been introduced in damage mechanics (micro-cracks). Nevertheless there are only very few numerical calculations in this field, which is due to the fact that the mesoscopic continuum theory uses a higher dimensional space. In special cases like e.g. twist-waves the dimensionality can be reduced. The idea is to use the finite element method and to compare the results with simulations in the field of mechanics with internal variables.
FP7/2007-2013 Grant Agreement No. PERG04-GA-2008-238191
FP7 People Marie Curie Actions

[3] EITSA. 3d visualiseerimise süsteem ja paralleelarvuti, 2010. Budget (support from EITSA) 133350 EEK.
The aim of the project is to establish a 3D visualization system for scientific data at CENS, Küberneetika Intituut. Scientific simulations, like computational fluid dynamics or simulations using discrete element method, produce very large data sets, these are usually 3D. For the interpretation of this data a real 3D display is much better than a projection on a standard 2D computer screen. Also some features of the 3D data can only be seen, if the data is visualized in 3D and not when viewed on a standard 2D computer screen. The graphics-workstation will also be used for computation, as it contains newest generation multi-core processors and powerful graphics-cards, that can be used as massively parallel processors.
Grant 10-03-00-24
Tiger University

[4] DoRa [European Social Fund's Doctoral Studies and Internationalisation Programme]. Diffusion of oriented particles on fractals, 8/2011. Stipendium for visit of R. Haber (TU Chemnitz).

EU Social Fund DoRa Archimedes

[5] DoRa [European Social Fund's Doctoral Studies and Internationalisation Programme]. 3D virtual reality visualization techniques for microstructured materials and virtual reality systems improvements. Stipendium for E. Pastorelli (PhD studies) 2012-2015.

EU Social Fund DoRa Archimedes

[6] EITSA. VisPar-2: 3d visualiseerimise süsteem, 2012. Budget (support from EITSA) 6500 Euro.
The aim of the project is to establish a multiwall 3D visualization system for scientific data at CENS, Küberneetika Intituut, to extend the existing 3D screen. Scientific simulations, like computational fluid dynamics or simulations using discrete element method, produce very large amounts of data, these are usually 3D, which needs to be turned into information. For the interpretation of this data a real 3D display is much better than a projection on a standard 2D computer screen. Also some features of the 3D data can only be seen, if the data is visualized in 3D and not when viewed on a standard 2D computer screen. The graphics-workstation will also be used for computation, as it contains newest generation multi-core processors and powerful graphics-cards, that can be used as massively parallel processors.
The new system will be reconfigurable, so it can be used as an L-shaped bench (with additional side-wall) with projection on back, side and "floor" or a large stereo-projection onto the wall for seminars. While it is not possible to build a full-sized CAVE-like environment, due to the large space requirements the planned system will have all the features of the large version and can later be scaled-up by using larger screens if space becomes available. Furthermore headtracking will be implemented to assure a correct viewpoint and 3 dimensional interaction with the data.
Grant 12-03-00-11
Tiger University

[7] DAAD-RISE. Simulation of SFRC. Stipendium for V. Berg (internship) 6/2012-8/2012.
In steel fibre reinforced concrete (SFRC) the conventional reinforcement is replaced by short metal fibres, that are mixed into the concrete during production. The properties, e.g. strenght, depend on the spatial and orientation distribution of these fibres. To better understand the influence of orientation distribution on the strenght, high resolution simulations using discrete element method (DEM) will be performed.
DAAD-RISE worldwide

[8] DoRa [European Social Fund's Doctoral Studies and Internationalisation Programme]. Computational Fluid Dynamic calculations to predict fibre orientation distributions in SFRM production, 5-6/2013. Stipendium for visit of A. Macanovskis (Riga Tech.).

EU Social Fund DoRa Archimedes

[9] EITSA. VisPar-3: Low cost 3D scanning and optical tracking, 2013. Budget (support from EITSA) 1778.19 Euro.
The aim of the project is to extend the multiwall 3D visualization system for scientific data at CENS, K¨berneetika Intituut, by low-cost optical tracking and 3D scanning. The 3D VR system, while being smaller than a full-sized CAVE-like environment, still has the important features of the large version. It features headtracking to assure a correct viewpoint and 3 dimensional interaction with the data. The necessity of tracking the user and problems that occur if only a master-user is tracked, but the system is used by several persons. The existing magnetic tracker is sensitive to metal and electronic components in the vicinity, also it emits an electromagnetic field, which might not always be wanted, e.g. in medical applications. Therefore research into low-cost optical tracking is desirable. The system will be extended by several Kinect optical trackers and Razer "Hydra" controllers (further 6-degree of freedom mice/wand) and a development workstation. The development workstation will be used for student projects and internships to develop and test software for interacting with the 3D virtual environment. For example using this workstation students can experiment with the configuration of a virtual reality environment, without any danger of messing up the configuration of the large production system. One of the projects for students would be to implement a low-cost optical tracker using multiple Kinects. Currently a "Kinect" can be used to track and recognice the posture of users: skeleton and face tracking. Face tracking is a new feature, and not yet combined with skeleton tracking, however both are necessary to create the correct point-of-view for the user of a virtual environment. Further the view angle of the Kinect is limited and the orientation of the face can only be detected if the line-of-sight differs less than approximately 70 degrees from the direction to the camera, which is not enough for an immersive environment. The idea is to combine several Kinects so that the user is always facing one of them and combine the skeleton and face information from all Kinects into the correct position and posture of the user. A similar approach is used by the marker-based high-end optical tracking systems (which cost 20000 Euro and more), whereas the Kinect based solution would be marker-free and could be implemented on a low-budget basis. Furthermore a multi-kinect setup like this can be used as a 3D scanner.
Grant 13030009
Tiger University

[10] DAAD-RISE. VR infrastructure development. Stipendium for M. Padilla (internship) 7/2014-9/2014 (12 weeks).
Development of software for an immersive Virtual Reality system. There are several possibilities which can be chosen, depending on the interest of the intern, some are for accessing hardware components, like the tracker, using VRPN, others are applications for visualizing special data using the VRUI library or jReality.
DAAD-RISE worldwide

[11] DAAD-RISE. VR infrastructure development. Stipendium for M. Krause (internship) 8/2014-10/2014 (6 weeks).
Development of software for an immersive Virtual Reality system. There are several possibilities which can be chosen, depending on the interest of the intern, some are for accessing hardware components, like the tracker, using VRPN, others are applications for visualizing special data using the VRUI library or jReality.
DAAD-RISE worldwide

[12] HITSA. Visit of the "First Conference on Augmented and Virtual Reality (Salento AVR 2014)", 9/2014. Budget (support from HITSA) 1000 Euro.
The aim was the attendence of the conference and to give the presentation "Virtual Reality Visualization for Photogrammetric 3D Reconstructions of Cultural Heritage".
Tiger University

[13] DoRa [European Social Fund's Doctoral Studies and Internationalisation Programme]. Virtual Reality in Medical and Cultural Heritage Applications, 3-5/2015. Stipendium for visit of F. Ricciardi (Univ. di Salento).

EU Social Fund DoRa Archimedes

[14] DoRa [European Social Fund's Doctoral Studies and Internationalisation Programme]. Microstructure Analysis using Computed Tomography, 7-8/2015. Stipendium for visit of D. Zhang (Tech. Univ. Bergakademie Freiberg).

DoRa

[15] DAAD-RISE. Simulation of complex materials and composites. Stipendium for D. K. Do (internship) 7/2015-9/2015 (12 weeks).

DAAD-RISE worldwide

[16] ETAg PUT1146. Rheology of short fibre reinforced cementitious composites and influence on fracture behaviour, 1/2016-12/2019. Budget 52800/year Euro.
Within this project the influence of the rheology on the spatial and orientational distribution of short fibres in short fibre reinforced cementitious composites will be investigated numerically and experimentally. The orientation distribution of the fibres defines the material symmetry and is important for the material properties. The dependence of the material properties on the fibre orientation will be investigated. Further, software for the analysis of fibre distributions from CT images will be developed. The software will make the analysis more easy. Also software for the visualization of orientation distribution fields will be developed.

Impressum

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This file was last modified 15 February, 2017

[1]	Alexander von Humboldt Foundation. Continuum mechanics with internal variables, 4/2008-3/2012. Feodor Lynen Fellowship. Das beantragte interdisziplinäre Projekt beschäftigt sich mit der Weiterentwicklung von Methoden zur Beschreibung komplexer Materialien in der Theoretischen Kontinuumsphysik und Thermomechanik. Insbesondere sollen komplexe Materialien, wie Flüssigkristalle und mikrostrukturierte Festkörper, im Rahmen der mesoskopischen Kontinuumsphysik und der Kontinuumsmechanik mit inneren Variablen behandelt werden. Der derzeitige Stand beider Theorien erlaubt keine Aussage darüber, welche Theorie die geeignetere ist. Dies soll in diesem Projekt geändert werden, dazu ist eine Weiterentwicklung beider Theorien nötig, sowie die Anwendung auf Beispielprobleme. Letzteres soll numerisch durch Anwendung einer Finite-Elemente-Methode bzw. der Finite-Volumen-Methode geschehen. Dazu muß auf mathematischer Seite die Netzgenerierung für hochdimensionale Räume und Produkträume entwickelt bzw. verbessert werden.
[2]	EU FP7 Marie-Curie ERG. Estwave (educational, scientific and technological aspects of mesoscopic continuum physics for waves in complex materials), 4/2009-3/2012. Budget: 45000 Euro. The central topic of this proposal is Mesoscopic Continuum Physics, a theory which is situated between microscopic description which focusses on the individual particle and uses statistical methods and macroscopic phenomenological continuum mechanics, which usually does not take into account microstructure. Mesoscopic Continuum Physics combines aspects of both, it uses the continuum point of view and includes the distribution function as a statistical element. The mesoscopic continuum theory had been developed in the field of liquid crystals, but since then has been successfully applied to theoretical description of granular media and has also been introduced in damage mechanics (micro-cracks). Nevertheless there are only very few numerical calculations in this field, which is due to the fact that the mesoscopic continuum theory uses a higher dimensional space. In special cases like e.g. twist-waves the dimensionality can be reduced. The idea is to use the finite element method and to compare the results with simulations in the field of mechanics with internal variables. FP7/2007-2013 Grant Agreement No. PERG04-GA-2008-238191
[3]	EITSA. 3d visualiseerimise süsteem ja paralleelarvuti, 2010. Budget (support from EITSA) 133350 EEK. The aim of the project is to establish a 3D visualization system for scientific data at CENS, Küberneetika Intituut. Scientific simulations, like computational fluid dynamics or simulations using discrete element method, produce very large data sets, these are usually 3D. For the interpretation of this data a real 3D display is much better than a projection on a standard 2D computer screen. Also some features of the 3D data can only be seen, if the data is visualized in 3D and not when viewed on a standard 2D computer screen. The graphics-workstation will also be used for computation, as it contains newest generation multi-core processors and powerful graphics-cards, that can be used as massively parallel processors. Grant 10-03-00-24
[4]	DoRa [European Social Fund's Doctoral Studies and Internationalisation Programme]. Diffusion of oriented particles on fractals, 8/2011. Stipendium for visit of R. Haber (TU Chemnitz).
[5]	DoRa [European Social Fund's Doctoral Studies and Internationalisation Programme]. 3D virtual reality visualization techniques for microstructured materials and virtual reality systems improvements. Stipendium for E. Pastorelli (PhD studies) 2012-2015.
[6]	EITSA. VisPar-2: 3d visualiseerimise süsteem, 2012. Budget (support from EITSA) 6500 Euro. The aim of the project is to establish a multiwall 3D visualization system for scientific data at CENS, Küberneetika Intituut, to extend the existing 3D screen. Scientific simulations, like computational fluid dynamics or simulations using discrete element method, produce very large amounts of data, these are usually 3D, which needs to be turned into information. For the interpretation of this data a real 3D display is much better than a projection on a standard 2D computer screen. Also some features of the 3D data can only be seen, if the data is visualized in 3D and not when viewed on a standard 2D computer screen. The graphics-workstation will also be used for computation, as it contains newest generation multi-core processors and powerful graphics-cards, that can be used as massively parallel processors. The new system will be reconfigurable, so it can be used as an L-shaped bench (with additional side-wall) with projection on back, side and "floor" or a large stereo-projection onto the wall for seminars. While it is not possible to build a full-sized CAVE-like environment, due to the large space requirements the planned system will have all the features of the large version and can later be scaled-up by using larger screens if space becomes available. Furthermore headtracking will be implemented to assure a correct viewpoint and 3 dimensional interaction with the data. Grant 12-03-00-11
[7]	DAAD-RISE. Simulation of SFRC. Stipendium for V. Berg (internship) 6/2012-8/2012. In steel fibre reinforced concrete (SFRC) the conventional reinforcement is replaced by short metal fibres, that are mixed into the concrete during production. The properties, e.g. strenght, depend on the spatial and orientation distribution of these fibres. To better understand the influence of orientation distribution on the strenght, high resolution simulations using discrete element method (DEM) will be performed.
[8]	DoRa [European Social Fund's Doctoral Studies and Internationalisation Programme]. Computational Fluid Dynamic calculations to predict fibre orientation distributions in SFRM production, 5-6/2013. Stipendium for visit of A. Macanovskis (Riga Tech.).
[9]	EITSA. VisPar-3: Low cost 3D scanning and optical tracking, 2013. Budget (support from EITSA) 1778.19 Euro. The aim of the project is to extend the multiwall 3D visualization system for scientific data at CENS, K¨berneetika Intituut, by low-cost optical tracking and 3D scanning. The 3D VR system, while being smaller than a full-sized CAVE-like environment, still has the important features of the large version. It features headtracking to assure a correct viewpoint and 3 dimensional interaction with the data. The necessity of tracking the user and problems that occur if only a master-user is tracked, but the system is used by several persons. The existing magnetic tracker is sensitive to metal and electronic components in the vicinity, also it emits an electromagnetic field, which might not always be wanted, e.g. in medical applications. Therefore research into low-cost optical tracking is desirable. The system will be extended by several Kinect optical trackers and Razer "Hydra" controllers (further 6-degree of freedom mice/wand) and a development workstation. The development workstation will be used for student projects and internships to develop and test software for interacting with the 3D virtual environment. For example using this workstation students can experiment with the configuration of a virtual reality environment, without any danger of messing up the configuration of the large production system. One of the projects for students would be to implement a low-cost optical tracker using multiple Kinects. Currently a "Kinect" can be used to track and recognice the posture of users: skeleton and face tracking. Face tracking is a new feature, and not yet combined with skeleton tracking, however both are necessary to create the correct point-of-view for the user of a virtual environment. Further the view angle of the Kinect is limited and the orientation of the face can only be detected if the line-of-sight differs less than approximately 70 degrees from the direction to the camera, which is not enough for an immersive environment. The idea is to combine several Kinects so that the user is always facing one of them and combine the skeleton and face information from all Kinects into the correct position and posture of the user. A similar approach is used by the marker-based high-end optical tracking systems (which cost 20000 Euro and more), whereas the Kinect based solution would be marker-free and could be implemented on a low-budget basis. Furthermore a multi-kinect setup like this can be used as a 3D scanner. Grant 13030009
[10]	DAAD-RISE. VR infrastructure development. Stipendium for M. Padilla (internship) 7/2014-9/2014 (12 weeks). Development of software for an immersive Virtual Reality system. There are several possibilities which can be chosen, depending on the interest of the intern, some are for accessing hardware components, like the tracker, using VRPN, others are applications for visualizing special data using the VRUI library or jReality.
[11]	DAAD-RISE. VR infrastructure development. Stipendium for M. Krause (internship) 8/2014-10/2014 (6 weeks). Development of software for an immersive Virtual Reality system. There are several possibilities which can be chosen, depending on the interest of the intern, some are for accessing hardware components, like the tracker, using VRPN, others are applications for visualizing special data using the VRUI library or jReality.
[12]	HITSA. Visit of the "First Conference on Augmented and Virtual Reality (Salento AVR 2014)", 9/2014. Budget (support from HITSA) 1000 Euro. The aim was the attendence of the conference and to give the presentation "Virtual Reality Visualization for Photogrammetric 3D Reconstructions of Cultural Heritage".
[13]	DoRa [European Social Fund's Doctoral Studies and Internationalisation Programme]. Virtual Reality in Medical and Cultural Heritage Applications, 3-5/2015. Stipendium for visit of F. Ricciardi (Univ. di Salento).
[14]	DoRa [European Social Fund's Doctoral Studies and Internationalisation Programme]. Microstructure Analysis using Computed Tomography, 7-8/2015. Stipendium for visit of D. Zhang (Tech. Univ. Bergakademie Freiberg).
[15]	DAAD-RISE. Simulation of complex materials and composites. Stipendium for D. K. Do (internship) 7/2015-9/2015 (12 weeks).
[16]	ETAg PUT1146. Rheology of short fibre reinforced cementitious composites and influence on fracture behaviour, 1/2016-12/2019. Budget 52800/year Euro. Within this project the influence of the rheology on the spatial and orientational distribution of short fibres in short fibre reinforced cementitious composites will be investigated numerically and experimentally. The orientation distribution of the fibres defines the material symmetry and is important for the material properties. The dependence of the material properties on the fibre orientation will be investigated. Further, software for the analysis of fibre distributions from CT images will be developed. The software will make the analysis more easy. Also software for the visualization of orientation distribution fields will be developed.