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Proceedings Paper

Study of simple CFRP-metal joint failure
Author(s): Jingquan Cheng; Antonio Rodriguez; Nicolas Emerson; Arthur Symmes
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Paper Abstract

In millimeter wavelength telescope design and construction, there have been a number of mysterious failures of simple CFRF-metal joints. Telescope designers have not had satisfactory interpretations of these failures. In this paper, factors which may influence the failure of joints are discussed. These include stress concentration, material creep, joint fatigue, reasons related to chemical process and manufacture process. Extrapolation formulas for material creep, joint fatigue, and differential thermal stresses are derived in this paper. Detailed chemical and manufacturing factors are also discussed. All these issues are the causes of a number of early failures under a loading which is significantly lower than the strength of adhesives used. For ensuring reliability of a precision instrument structure joint, the designer should have a thorough understanding of all these factors.

Paper Details

Date Published: 23 July 2008
PDF: 6 pages
Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 70183F (23 July 2008); doi: 10.1117/12.786667
Show Author Affiliations
Jingquan Cheng, National Radio Astronomy Observatory (United States)
Antonio Rodriguez, National Radio Astronomy Observatory (United States)
Nicolas Emerson, National Radio Astronomy Observatory (United States)
Arthur Symmes, National Radio Astronomy Observatory (United States)


Published in SPIE Proceedings Vol. 7018:
Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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