Hygrothermal design of high stability telescope structure

Deoggyu Lee

doi:10.1117/12.666947

9 December 2005 Hygrothermal design of high stability telescope structure

Deoggyu Lee

Proceedings Volume 6024, ICO20: Optical Devices and Instruments; 602423 (2005) https://doi.org/10.1117/12.666947
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

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.

Citation Download Citation

Deoggyu Lee "Hygrothermal design of high stability telescope structure", Proc. SPIE 6024, ICO20: Optical Devices and Instruments, 602423 (9 December 2005); https://doi.org/10.1117/12.666947

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