An approximate analytical model is utilized to examine the extension-twist coupling and torsional stiffness properties of star beams constructed with a new family of hygrothermally stable optimized stacking sequences. The relationship between axial force and the twist rate is used to quantify the results. The results show that there is a decrease in torsional rigidity corresponding to an increase in extension-twist coupling. The new stacking sequences allow for the addition of more substrips while maintaining comparable levels of extension-twist coupling with beams constructed from prior benchmark layups. This results in higher levels of torsional stiffness for comparable levels of extension-twist coupling in star beams made of the new optimized stacking sequences.
Analysis of the Extension-Twist Coupling in Hygrothermally Stable Star Beam Composites
Muder, S, Haynes, R, & Armanios, E. "Analysis of the Extension-Twist Coupling in Hygrothermally Stable Star Beam Composites." Proceedings of the ASME 2011 International Mechanical Engineering Congress and Exposition. Volume 8: Mechanics of Solids, Structures and Fluids; Vibration, Acoustics and Wave Propagation. Denver, Colorado, USA. November 11–17, 2011. pp. 477-481. ASME. https://doi.org/10.1115/IMECE2011-65318
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