In this paper the suitability of active shape memory alloy hybrid composite (SMAHC) technology to realize an adaptive airfoil trailing edge is evaluated. The demonstrator component investigated highlights the potential of such concept as an extreme lightweight variant of a morphing trailing edge. The main challenges for successful implementation according to today´s typical requirements were identified. The investigation includes analysis and model based modification of an successfully flight tested concept for adaptive vortex generators,1 as well as the design and implementation of a demonstrator of a morphing trailing edge, and its experimental investigation in the laboratory.
To reduce installation space as well as weight, the use of shape memory alloys (SMA) is advantageous in the field of actuator technology. A big challenge using SMAs in for actuation is their high energy consumption due to Joule heating. To overcome this, an actuator system based on the agonist-antagonist principle, using SMA wire actuators was developed. Main advantage is the possibility of an energy-free holding of the position without the use of special locking components. A prototype made of CFRP and SMA wires was developed and built. The structure consists of a CFRP laminate on which SMA wires are anchored on the upper and lower side. This work also contents a simulation approach of the actuating structure in ABAQUS® using a simplified phenomenological model.
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