Berlin 2005 – wissenschaftliches Programm
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AKB: Biologische Physik
AKB 100: Poster Session I
AKB 100.21: Poster
Samstag, 5. März 2005, 16:45–18:45, Poster TU D
Morphometry of nutshells and foams — •Boris Breidenbach1,2, Ulrike Wegst2, and Klaus Mecke1,2 — 1Institut für theoretische Physik, Universität Erlangen — 2MPI für Metallforschung, Stuttgart
In the development and design of new materials and structures, researchers more and more turn to nature for inspiration and assistance. An understanding of real-world hierarchical structures across a range of length scales is considered to be the key to optimise physical properties. High resolution 3D micro-computed tomography data of nutshells, bones, wood, and foams open the possibility to characterise and model biological structures and to relate macroscopic physical properties to the microstructure. Fast imaging at ESRF makes it even possible to study dynamic behaviour, e.g., the coarsening of foams. Huge datasets (20003) require the development of massively parallel algorithms for fast image reconstruction, filtering (edge preserving anisotropic diffusion), and segmentation (region growing). Morphometry charts of Minkowski functionals such as volume V, surface area S, mean curvature H, and Euler characteristic χ provide robust structural indices of pore spaces to identify, for instance, scaling behaviour of pores. For isotropic and homogeneous sandstones the measurement of Minkowski functionals allows an accurate prediction of permeabilities and elastic properties directly from the segmented tomographic datasets of the pore space (PRL91,215506). Extending the integral geometric technique towards tensorial morphometric functionals, an application on biomaterials seems promising, because their generic anisotropic nature can be taken into account.