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Launch Vibration of Pre-Tensioned Coiled Structures

Wen, Alexander and Pellegrino, Sergio (2022) Launch Vibration of Pre-Tensioned Coiled Structures. In: AIAA SCITECH 2022 Forum. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2022-1883. ISBN 978-1-62410-631-6.

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Relative movement between slipping layers in a coil due to vibration can cause defects in the structure or damage functional elements, such as photovoltaic cells, attached to the structure. Radial contact pressure between successive layers due to coiling pre-tension provides a frictional force that can be used to resist inter-layer slip. In this study, we propose a stress-field based, analytical friction model to use as a criterion for estimating the frictional shear capacity of a wound roll prior to the onset of slip. Because the radial pressure varies with radial position in the coil, the shear capacity against slippage also varies with position. This analytical shear capacity can then be compared against the shear resultants obtained in finite-element simulations of coiled structures undergoing vibration load. Rather than modeling discrete windings of wound rolls, the starting coiled-stiff assumption is the coil is tensioned sufficiently to behave as a solid. Thus, a finite-element vibration study of a homogenized solid is used to find the loads and locations where shear resultant is larger than the estimated shear capacity, indicating slip. The validity of the coiled-stiff assumption is experimentally verified using a vibration experiment that measures the variation in apparent stiffness of a coiled membrane wound under varying tensions.

Item Type:Book Section
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URLURL TypeDescription Presentation
Pellegrino, Sergio0000-0001-9373-3278
Additional Information:© 2022 by the American Institute of Aeronautics and Astronautics, Inc.
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Other Numbering System NameOther Numbering System ID
AIAA Paper2022-1883
Record Number:CaltechAUTHORS:20220210-928446000
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Official Citation:Alexander Wen and Sergio Pellegrino. "Launch Vibration of Pre-Tensioned Coiled Structures," AIAA 2022-1883. AIAA SCITECH 2022 Forum. January 2022.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:113394
Deposited By: George Porter
Deposited On:10 Feb 2022 20:19
Last Modified:10 Feb 2022 22:12

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