Smart Materials and Structures involves all research related to the characterisation and application of smart materials as well as the production of smart structures. Materials in which sensors or actuators are incorporated or materials with healing capabilities are typically the scope of the research within this theme.
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Supramolecular self healing polymers
(Damage healing in composite materials employing supramolecular polymers)
Damage healing of fibre reinforced composite material with a thermoplastic matrix material based on supramolecular polymers is studied. These polymers show a dramatic decrease in viscosity upon heating, which is much larger than with standard thermoplastic matrix materials. The low viscosity allows easy access of the soft matrix material to small cracks, allowing local repair of damage. The supramolecular polymers consist of relatively short polymer chains bonded by Ureidopyrimidone (UPy) groups that are based on quadruple, reversible, hydrogen bonds.
Ten Cate, Fokker, Airborne, Eindhoven University of Technology, SupraPolix.
(An inkjet printing-based process chain to conductive structures on printed circuit board materials)
Durk van Dijk
A process chain to fabricate conductive structures on printed circuit board materials was developed during this research project. This process chain comprises four main steps: plasma treatment, inkjet printing, electroless plating and functional characterisation. It represents a drastic reduction in the number of process steps when compared to the conventional lithography-based method, widely used in the printed circuit board industry.
Thales, Astron, Eindhoven University of Technology.
SMA selfhealing composites
Damage healing in thermoplastic composite plates by employing shape memory alloy wires
The potential of damage healing in thermoplastic composite laminates by using moulded-in shape memory alloy (SMA) wires is investigated. SMAs are able to return to a “remembered” size or shape when heated over the martensite-to-austenite transformation temperature. This shape memory effect is used to exert a compressive force on both sides of a delaminated region, while the thermoplastic matrix material is in its soft and ductile state in order for the delaminated region to heal.
IOP “Self healing materials”