Prediction and measurement of composite tube twist and bending due to thermal loading

A. Marcel Bluth; James R. Tucker; Troy Thompson

doi:10.1117/12.2026694

30 September 2013 Prediction and measurement of composite tube twist and bending due to thermal loading

A. Marcel Bluth, James R. Tucker, Troy Thompson

Proceedings Volume 8837, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems; 88370R (2013) https://doi.org/10.1117/12.2026694
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

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.

Citation Download Citation

A. Marcel Bluth, James R. Tucker, and Troy Thompson "Prediction and measurement of composite tube twist and bending due to thermal loading", Proc. SPIE 8837, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems, 88370R (30 September 2013); https://doi.org/10.1117/12.2026694

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