Vortrag des Monats: 3D-Analysis of Deformation and Fracture Processes in Heterogeneus Materials under Loading
Date:
Tuesday, 20.03.2007 18:30 Uhr
Status of booking
free
Venue:
Bayreuth, Kompetenzzentrum Neue Materialien Nordbayern GmbH
Varvara A. Romanova, Stuttgarter Institut für Materialprüfung, Werkstoffkunde und Festigkeitslehre (IMWF)
In this presentation the results on 3D-simulations will be reported for a number of heterogeneous materials with different kinds of internal interfaces (i.e. polycrystalline aluminium alloys, metal matrix composites, porous ceramics, and a coal piece with initially presenting cracks).
A mesoscale 3D-analysis of deformation and fracture processes under dynamic and quasistatic loading will be provided, including phenomena of strain localization, stress concentration near interfaces, micro-cracking and the interrelation of meso- and macro-scale processes.
Special attention will be dedicated to the development of fracture model and investigation of crack initiation and propagation in the aluminum-alumina composite and coal test-pieces in tension and compression. A specific role of the free surface in processes of plastic shear nucleation and crack initiation will be discussed for the materials in question.
Part 2: Hierarchical Numerical Simulation of Deformation and Fracture of Composite Materials