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Merry Christmas and a Happy New Year from the Department for Geodynamics and Sedimentology

After a scientifically very successful year when we celebrated the 150th anniversary of the foundation of the Geological Institute by Eduard Suess in 1862, the executive of the Department for Geodynamics and Sedimentology wishes all our members, students and collaborators peaceful and joyous holiday season and a prosperous New Year.

About our Season’s Greeting Movie: Distinct Element Method (DEM) model of a numerical rock containing star-shaped voids deformed under unconfined compression test conditions. Particles are coloured according to greatest compressive stress (red high, yellow low). Notice the continuous reorganisation of the force chain network (chains of red particles that form the loadbearing framework). The model also illustrates that the vertices of the stars are stress raisers so that fractures frequently nucleate there. In fact, the star-shaped voids decrease the bulk strength of this numerical rock by >50%. The model was designed by Martin Schöpfer and run using the PFC2D software.

 

Click image to start movie (animated gif; 5,1 MB)

Department for Geodynamics and Sedimentology
University of Vienna

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