Title Light Curing Resin Systems for Use in Inflatable Wing Applications
Source Proc. 50th Intl. SAMPE Symp. and Exhib.
Year 2005
Author(s) Hoyt Haight, A. E.; Harrah, L. A.; Allred, R. E.
Abstract Adherent Technologies has been developing light-curing resins to rigidize an inflatable wing for terrestrial and space applications. Current inflatable wings rely on the continuous presence of an inflation gas to maintain their shape. Rigidization of inflatable wings provides several potential advantages, including reducing the vulnerability to punctures, increasing stiffness and load- carrying capability, allowing a higher aspect ratio for high altitude efficiency and longer missions, and reducing weight by eliminating the make up pressurization supply. We have undertaken a multifaceted approach that includes defining operating environments for Mars survey craft and military UAVs; analyzing wing loads during deployment and rigidization as a function of internal pressure and leak rate to determine needed rigidization times; developing rapid cure resin formulations with long shelf lives; fabricating, deploying, and rigidizing a wing half-span; and testing and characterizing the rigidized wing. Epoxy acrylate and urethane acrylate-based resin formulations have been developed to cure in 10 seconds or less at 0°C under UV and broad spectrum illumination. Current program results are discussed.
Keywords Inflatable wings, rigidization, UV cure, rapid cure resin, epoxy acrylate resin, urethane acrylate resin, inflatable structures, low temperature cure, UAV