Characterization and Multiscale Simulation of Particle Systems for High Performance Ceramic MaterialsThursday (29.09.2016) 09:15 - 09:45 Part of:
As a member of innovative alliance “pades – Partikeldesign Thüringen”, MFPA is responsible for the development of a state of the art multiscale simulation approach for designing of high performance ceramic materials. Modeling and simulation is based on modern computer-aided methods of material characterization and enfolds functionalization of individual particles of basic raw material on the nanoscale, their thermomechanical processing in several steps up to the prediction of mechanical properties of high performance ceramic components on the macroscale.
Numerical simulations using discrete element method (DEM) allow to predict the mechanical properties of functionalized particles and the ceramics materials and components produced from these functionalized particles. The methodological basis is a multiscale approach where initially the individual particles have to be modeled at nanoscale which then have to be coupled to the models of mesoscale granules and macroscale ceramic components. This way, the whole process chain will be modeled i.e. from raw materials to the components. The geometric and physical properties of particles as well as the interaction between them in the form of contacts, friction and cohesion forces will be incorporated in the simulation models at different scales. With the help of experimental methods and numerical optimization, the individual models can be calibrated in such a way that the predictability of the entire multiscale simulation approach can be improved successively. State of the art material characterization methods including computer tomography (MicroCT) and scanning electron microscopy (SEM) are enabling the 3D characterization of the particles shapes/forms, their microstructure and their size distribution. Such methodological approach has the potential of targeted designing and production of high performance ceramic materials and components in future.
The model in hand is focused on ZTA ceramic implants by “Mathys Orthopädie GmbH” as a subproject of innovative regional growth core “pades – Partikeldesign Thüringen” funded by the German Federal Ministry for Education and Research (BMBF).