15 March 2018 Design and development of active bimorph structure for deployable space application
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Abstract
Deployable structures are increasingly studied for their enormous potential of space application. In this paper, we report the fabrication and analysis of an Active Bimorph Structure (ABS) by evaluating the variation of the curvature and the tip-displacement of the top fiber layer with respect to the change in applied voltage. The composite showing the bi-directional bending behaviour was fabricated using E-Glass fibre and Room Temper- ature Vulcanising (RTV) Silicone Rubber, embedded with NiTiNOL Shape Memory Alloy wires in two layers, at 0 and 90 degrees. The study of the deflection motion of the ABS shows that with an increase in temperature of the SMA wire, the bending curvature initially increases almost proportionally and finally reaches a constant steady curvature and the experimental results satisfy this condition. The second layer of the ABS system when actuated gives the composite a bi-directional bending behaviour. The future aim is to create an Active Bimorph Box Structure (ABBS) with composites placed and glued in such a manner that upon excitation the structure transforms first into a cylinder and eventually into a curved cylindrical element following its property of bi-directional bending.
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Rupal Srivastava, Arun Kumar Sharma, Arup Kumar Hait, Bishakh Bhattacharya, "Design and development of active bimorph structure for deployable space application", Proc. SPIE 10595, Active and Passive Smart Structures and Integrated Systems XII, 105953E (15 March 2018); doi: 10.1117/12.2296547; https://doi.org/10.1117/12.2296547
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