Abstract
A systematic approach is described for analyzing outgassing in spacecraft composites. Simplifications that apply to practical cases are listed then used to derive tractable mathematical expressions. The boundary condition in the model is related to temperature and surface treatment.
Outgassing of a platform subjected to sinusoidal heating is discussed in a numerical example. Sensitivity to small temperature fluctuations does not appear significant, but variations in mean temperature, energy levels, and surface parameters produce very different estimates of outgassing rates. It is recommended that thermal/diffusion tests be performed on samples fabricated simultaneously with flight hardware.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Glassford, P. (Ed.), Optical system contamination: effects, measurement, control. Froc. SPIE, Vol. 777, 1987.
Karam, R. D., Thermal engineering of spacecraft composite structures. In Composite Structures—3, ed. I. H. Marshall. Elsevier Applied Science, London, 1985.
Hall, D. F., Flight experiment to measure contamination enhancement by spacecraft charging. Proc. SPIE, Vol. 216, 1980.
The TOPEX Satellite System Performance Requirements, JPL Doc. 633–501, 1988.
Karam, R. D., Outgassing of spacecraft composites. In Composite Structures—4, ed. I. H. Marshall. Elsevier Applied Science, London, 1987.
Barber, R. M., Diffusion in and through Solids. The Macmillan Company, Cambridge, 1941.
Carslaw, H. S. and Jaeger, J. C, Conduction of Heat in Solids, 2nd edn. Oxford University Press, London, 1959.
Karam, R. D., Optimum solution of linearized radiation equations. In Numerical Methods in Thermal Problems, ed. R. W. Lewis and K. Morgan. Redwood Burn Limited, Swansea, 1979.
Final Design Assessment of ATS Reflector Support Truss, prepared for Fairchild Industries under Contract SC72–6, Hercules Inc., Magna, Utah, Sept. 1971.
Loos, A. C. and Springer, G. S., Moisture absorption of graphite-epoxy composites immersed in liquids and in humid air. J. Comp. Mater., 13 (April 1979) 131–47.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1989 Elsevier Science Publishers Ltd
About this chapter
Cite this chapter
Karam, R.D. (1989). Sensitivity Studies in the Outgassing of Spacecraft Composites. In: Marshall, I.H. (eds) Composite Structures 5. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1125-3_31
Download citation
DOI: https://doi.org/10.1007/978-94-009-1125-3_31
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6998-4
Online ISBN: 978-94-009-1125-3
eBook Packages: Springer Book Archive