Berlin 2005 – wissenschaftliches Programm

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M: Metallphysik

M 44: Symposium Tomographic Methods in Materials Research

M 44.2: Vortrag

Dienstag, 8. März 2005, 15:35–15:55, TU H1058

Materials analysis by joined microfocus computer tomography (µCT) and 3D Photogrammetry — •Matthias Schulze, Michael Nöthe, Bernd Kieback, and Hans-Gerd Maas — Technische Universität Dresden

The most important drawback in the theoretical description of sintering processes is the lack of a sufficient incorporation of cooperative material transport processes. This results in an inconsistence of the predicted and observed shrinkage behaviour of real sintered specimens. The first method to gain data necessary to develop a theory of cooperative material transport processes is microfocus computer tomography (µCT) joined with 3D photogrammetric image analysing to determine the particles and their motions. With methods based on subvoxel image analysing particles are detected automatically and their surface is modelled with subvoxel precision. To determine the spatial dynamic during the sintering process tracking and matching algorithms are implemented to trace single objects. These data proved the rotation of particles and allowed to determine geometrical and topological features like shape parameter, contact partners and interparticle contact area. These results give hints on the nature of the particle rearrangement and the characteristics of the sintering process. In addition the versatility of 3D photogrammetric image analysis will be shown by means of the development of cracks in concrete.