European Space Research and Technology Center





Digimat offered the engineers at the European Space Research and Technology Center the tools they needed to bridge the gap between the Micro world and the Macro world. Using Multi scale modeling of advanced woven composite material Digimat can support a virtual design of an ultra light satellite antenna.
  • Satellite antennas have to be designed in a sturdy and reliable manner
  • There is no easy way to repair a satellite once it breaks down
  • The extreme sensitivity of the structure towards thermal loads has to be investigated under environmental conditions
  • Multi-scale modeling of advanced woven composite material on 3 scales
  • Carbon/epoxy composite: homogenization of yarn properties
  • Triaxial woven fabrics (TWF): detailed analysis of a representative cell
  • Satellite antenna: simulation of the full structure based on an equivalent multi-layer shell model representative for TWF
Results Validation:
“DIGIMAT is able to bridge the micro to the Macro world. A great example of high-­-quality european know-­-how” Dr Julian Santiago Prowald, TEC-­-MSS Structures Section ESA/ ESTEC
  • Mean-field homogenization gives high quality prediction of yarn properties (stiffness & CTE)
  • Yarn properties used to compute accurate results for stiffness & CTE for TWF
  • Good prediction of displacement behaviour of the satellite antenna due to thermal loading