<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "The dynamics of crack patterns in soil induced by desiccation"^^ . "Many soil types develop cracks due to desiccation. The resulting crack patterns were simulated with the help of a network of springs, representing the breaking material. A spring breaks if the tensile stress on it exceeds a threshold. Based on existing models in the literature a numerical model was developed. It was used to study the time evolution of cracking and to investigate the nal crack pattern. It came out, that the model repro- duces some phenomena which can be observed in natural crack patterns (90 degree angles of intersections, dynamics of emerging cracks). Two parameters of the model - the disorder in the distribution of stress thresholds for the individual springs and a slipping threshold (resembling friction) - were varied and their impact on the crack pattern was studied. It was found that friction induces a characteristic scale. Varying disorder, a continuous transition from loop-like closed cracks (loops) to a system of not interconnected cracks was observed. The number of loops in the topology of the crack pattern, was introduced as an order parameter. Besides the theoretical part, an experiment was carried out. A bentonite-sand-water mixture was prepared as a layer on a glass plate and dried at room temperature. As a result of drying crack patterns developed. These were recorded by a digital camera. Binary pictures were obtained and the number of loops in the crack patterns of the completely dried mixtures counted. Varying the mass ratio of bentonite to sand a similar transition sas in the model was observed."^^ . "2000" . . . . . . . . "Heiko"^^ . "Hoffmann"^^ . "Heiko Hoffmann"^^ . . . . . . "The dynamics of crack patterns in soil induced by desiccation (PDF)"^^ . . . "hoffmann_00_diplomarbeit.pdf"^^ . . . "The dynamics of crack patterns in soil induced by desiccation (Other)"^^ . . . . . . "small.jpg"^^ . . . "The dynamics of crack patterns in soil induced by desiccation (Other)"^^ . . . . . . "medium.jpg"^^ . . . "The dynamics of crack patterns in soil induced by desiccation (Other)"^^ . . . . . . "preview.jpg"^^ . . . "The dynamics of crack patterns in soil induced by desiccation (Other)"^^ . . . . . . "lightbox.jpg"^^ . . "HTML Summary of #3631 \n\nThe dynamics of crack patterns in soil induced by desiccation\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .