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http://dx.doi.org/10.12985/ksaa.2019.27.1.051

Torsional response of stiffened circular composite spar  

Kim, Sung Joon (한국항공우주연구원)
Lee, Donggeon (한국항공우주연구원)
Publication Information
Journal of the Korean Society for Aviation and Aeronautics / v.27, no.1, 2019 , pp. 51-56 More about this Journal
Abstract
To reduce the structural weight, thin-walled circular composite tube has been used as a main spar of high altitude-long endurance unmanned air vehicle(HALE UAV). Predicting the torsional response of stiffened circular spar is complex due to the inhomogeneous nature of section properties, which are dependent on fiber architecture and constituent material properties. The stiffener were placed in the top and bottom sectors of a tube to increase the torsional capabilities such as the rigidity and buckling strength. Numerical simulations were performed to estimate the effect of the stiffener on the torsional capacities. A static experimental test was performed on a stiffened tube, and the test results were compared with a numerical model. The numerical models showed good correlation and demonstrated the ability to predict the torsional capacity. Results presented herein will exhibit the effectiveness of stiffener on torsional strength and stiffness.
Keywords
HALE UAV; Composite spar; Torsional response; Buckling strength; Torsional test;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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