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Proceedings Paper

Prediction and measurement of composite tube twist and bending due to thermal loading
Author(s): A. Marcel Bluth; James R. Tucker; Troy Thompson
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Paper Abstract

Composite materials are applied in precision optical metering structures because of their low thermal expansion properties in concert with high specific stiffness. Twisting and bending of long composite tubes, such as the secondary mirror support structure for the JWST telescope, requires control and verification. A stochastic modeling method was applied that simulates the manufacturing process variability and estimates ranges for expected twist and bend over the tube length from ambient to cryogenic temperatures. A development strut for the JWST secondary mirror support structure was fabricated and a metrology system was designed and implemented that measured the bend and twist response from ambient to 30 K. Modeling methods and predictions are outlined. The test metrology and results are summarized, along with a comparison between test and prediction.

Paper Details

Date Published: 30 September 2013
PDF: 6 pages
Proc. SPIE 8837, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems, 88370R (30 September 2013); doi: 10.1117/12.2026694
Show Author Affiliations
A. Marcel Bluth, ATK Space Structures (United States)
James R. Tucker, ATK Space Structures (United States)
Troy Thompson, ATK Space Structures (United States)

Published in SPIE Proceedings Vol. 8837:
Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems
Joseph L. Robichaud; Matthias Krödel; William A. Goodman, Editor(s)

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