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Proceedings Paper

Hingeless CFRP structure by using partially flexible composites
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Paper Abstract

Designs for future spacecraft have been conceived with very large lightweight apparatus and structures. New techniques of packaging to be stowed into existing launch vehicles are desired. A kind of current deployment techniques is mechanical hinge mechanisms and this results in an increase of weight in structures. In the present study, Partially- Flexible CFRP with SMA embedded (PFC-S) is proposed to be appropriate for the deployable structures. The PFCS consists of two kinds of matrices: high-stiffness resin matrix and low-stiffness rubber matrix, and the SMA are embedded in low-stiffness rubber part. It can be deformed and folded for packaging and it can be deployed with over 80°C due to the SMA embedded. Since the width of PFCS influences the foldable shape, the relationship between width of the PFCS and the curvature of foldable shape is investigated by using specimens with various width of flexible part. Also the effect of SMA embedded and temperature change on bending stiffness in specimen is measured. As a result, it is found that narrow PFCS specimen keeps appropriate shape with comfortable curvature, and SMA embedded and elevated temperature increases bending modulus of the PFCS specimen.

Paper Details

Date Published: 12 April 2007
PDF: 9 pages
Proc. SPIE 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007, 65261S (12 April 2007); doi: 10.1117/12.717210
Show Author Affiliations
A. Todoroki, Tokyo Institute of Technology (Japan)
Keisuke Kumagai, Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 6526:
Behavior and Mechanics of Multifunctional and Composite Materials 2007
Marcelo J. Dapino, Editor(s)

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