Finite Element Modelling and Experimental Testing of SMA-Driven Origami Membranes for Space Applications

Active origami structures offer an effective solution for designing thin membrane systems in space applications such as solar sails and drag sails. By utilizing origami patterns and embedding stimuli-responsive smart materials within the structure, it is possible to maximize packing efficiency and ensure passive deployment functionality. This work investigates the deployment of a Kapton thin-membrane origami structure using shape memory alloy (SMA) microactuators based on NiTi alloy with thermally induced activation. Experimental investigations are conducted to evaluate the mechanical behavior of a single crease and to determine the crease rigidity parameter. A methodology for the numerical design of the structure is proposed and developed. Two actuation modes involving bending and torsional actuators are investigated. Finally, the simulations are replicated experimentally to validate the proposed methodology.