A novel type of morphing twisting structure capable of large deformations is investigated. The structure consists of two flanges subject to a uniform distributed bending moment along their length and joined to introduce two stable twisted configurations. These equilibria are positioned symmetrically with regards to the vertical axis of the device and the structure can be twisted between these configurations by a snap-through action. By tailoring the design parameters of the structure, different twist angles and snap-through moments can be achieved. An analytical model and finite element model (FEM) are presented. A prototype made of carbon-fibre reinforced plastic (CFRP) was manufactured and tested. Agreement in terms of angle of twist, axial force and stiffness is found. Moreover, comparison between the two models confirms their validity in terms of snap-through moment, torsional stiffness and strain energy levels. The influence of the lay-up employed and design parameter is also investigated. Potential applications include deployable and morphing structures.
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ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 18–21, 2011
Scottsdale, Arizona, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-5471-6
PROCEEDINGS PAPER
Concept for a Bistable Composite Twisting Structure
Xavier Lachenal
,
Xavier Lachenal
University of Bristol, Bristol, UK
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Stephen Daynes
,
Stephen Daynes
University of Bristol, Bristol, UK
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Paul Weaver
Paul Weaver
University of Bristol, Bristol, UK
Search for other works by this author on:
Xavier Lachenal
University of Bristol, Bristol, UK
Stephen Daynes
University of Bristol, Bristol, UK
Paul Weaver
University of Bristol, Bristol, UK
Paper No:
SMASIS2011-5070, pp. 573-581; 9 pages
Published Online:
February 7, 2012
Citation
Lachenal, X, Daynes, S, & Weaver, P. "Concept for a Bistable Composite Twisting Structure." Proceedings of the ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1. Scottsdale, Arizona, USA. September 18–21, 2011. pp. 573-581. ASME. https://doi.org/10.1115/SMASIS2011-5070
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