HANNOVER MESSE 2019, 01 - 05 April
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Smart materials

as actuators and sensors in fiber-reinforced plastics

Logo Fraunhofer-Institut IWU


Fraunhofer-Institut IWU

Exhibitor details
Exhibitor details
Logo Smart materials

Product description

Smart materials have the ability to adapt independently to changing
environmental conditions or to specifically alter their properties due to external influences so that they are optimally adapted to their environment. One example for smart materials consists of thermal shape memory alloys (SMA). Upon heating they assume an initial shape that had previously been programmed into the material. At Hannover Messe the Fraunhofer scientists show how this smart material can be used for actuators and sensors in fiber-reinforced plastics: it is introduced into the composite material in the form of wires in order to utilize the deformation movement to achieve the initial state. Fields of application for this technology include tempering of engines, fuel cells or batteries in a car. If air inlets, which are made of fiber-plastic composites and equipped with SMA, are applied in this situation, they can be used as a self-sufficient cooling system. Visitors at Hannover Messe can experience a functional model of such an air inlet.
SMA wires cannot only be used as actuators; they can also serve as sensors. Here the scientists utilize the properties of SMA allowing them to register strains of up to 8 percent and to remain stable for a very high number of load cycles. If power is applied and the electric resistance is measured, the deformation of the wires can be deduced, which also implies deducing the deformation of the entire structure. This technology can be used, for example, to check the condition of airplane wings or rotors of wind power plants. The scientist will also present current research results of this area at Hannover Messe.

Hall 2, Stand C22

Fraunhofer-Gesellschaft Pavilion
(Main stand)

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