Max Planck Intelligent Systems Colloquium, Stuttgart

8863 1485856306

Design of mechanical properties of soft elastic materials through network architecture

  • Datum: 16.02.2017
  • Uhrzeit: 11:00 - 12:30
  • Vortragender: Professor Costantino Creton, Laboratory of Soft Matter Science and Engineering, ESPCI, Paris
  • Ort: MPI IS Stuttgart, Heisenbergstr. 3
  • Raum: 3P 2
  • Gastgeber: Metin Sitti Managing Director, Max Planck Institute for Intelligent Systems
  • Kontakt: officesitti@is.mpg.de
Soft elastic materials are usually made from networks of flexible polymer chains, where entropic elasticity controls the storage and release of elastic energy. They can, in principle, deform reversibly up to the point where polymer chains are highly oriented in the tensile direction, but in practice these elastic networks fail often early due to crack propagation. This is particular true for very soft ones such as gels and for simple networks of elastomers. In recent years new reversibly elastic materials have been developed with a non-random network architecture specifically designed to delay fracture. Costantino Creton is going to discuss and rationalize these strategies and show an example of how sacrificial bonds inside the material can provide significant toughening in the fracture mechanics sense, while retaining the reversible elasticity of the material.

 
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