Hybrid Simulation Methods for the Damage Analysis of Multiphase Composites

Mentor: Prof. Dr.-Ing. habil. Carsten Könke
: Dipl.-Phys. Albrecht Schmidt
: 01.12.2008 - 30.11.2011

The development of new materials in civil and mechanical engineering are based on computational material experiments replacing cost and time intensive real laboratory experiments more and more. Actually the numerical simulation methods are shifting from macro-scale phenomenological observations towards coupled meso-, micro- and nano-scale description and modelling of the mechanical and physical behaviour of multiphase materials. E.g. the forecast of damaging effects in such materials can be represented in high precision with these new modelling approaches.

This research project considers efficient approaches for the numerical simulation of micro-structural damage effects in multiphase materials improving actual modelling techniques not only for the forecast of the lifetime of concrete and or reinforced concrete structures. One important aspect is the development of efficient FE based simulation methods for the the high resolution representation of heterogeneous microstructures. The hybrid modelling are based on the combination of grid-based and aligned discretizations with corresponding computation techniques of such problems especially in regions of the phase transfer. Therewith the disadvantages, e.g. stress singularity effects in such regions, resulting from purely grid-based procedures will be avoided as well as the limitations regarding to the consideration of physical nonlinear material behaviour.

Main tasks:

  • 3D modelling of heterogeneous particle structures
  • Combined discretization methods (mixed/dual)
  • Partitioned computation: Iterative methods based on domain decomposition
  • Discrete and continuum damage modelling
  • GPU computing