Hygrothermal design of high stability telescope structure

Details Hygrothermal design of high stability telescope structure Hygrothermal design of high stability telescope structure

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spie.6034...77l&link_type=abstract

ICO20: Optical Design and Fabrication. Edited by Breckinridge, James; Wang, Yongtian. Proceedings of the SPIE, Volume 6034, pp

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Scientific paper

Structural and hygrothermal analysis for a composite tube is carried out in this study, that provides critical parameters for the design of a highly dimensionally stable space telescope. Carpet plots for laminate effective engineering constants are generated and used for the best tube lay-ups with high elastic modulus and highly insensitive to thermal and moisture expansion, which is essential for maintaining optical alignment of opto-mechanical system under random force applied during a launch campaign and orbital thermal load. Despace in the longitudinal direction under hygrothermal load of the tubes constructed with the selected lay-ups is calculated for the validation of lay-up designs on the dimensional stability. Dynamic analysis is also carried out to feature the resonant behaviour. A zig-zag triangular element accurately representing through thickness stress variations for laminated structures is developed in this study and incorporated into the structural and hygrothermal analysis.

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