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Multifunctional composite structures for space satellites / T. Ozaki in SAMPE JOURNAL, Vol. 44, N° 2 (03-04/2008)

[article]  inSAMPE JOURNAL > Vol. 44, N° 2 (03-04/2008) . - p. 6-11 Titre : Multifunctional composite structures for space satellites Type de document : texte imprimé Auteurs : T. Ozaki, Auteur ; H. Takeya, Auteur ; M. Kume, Auteur ; K. Sekine, Auteur Année de publication : 2008 Article en page(s) : p. 6-11 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : Mitsubishi Electric Corporation is currently developing a multifunctional composite structure for application to future space satellite. In addition to traditional structural and thermal functions, electrical functionality is incorporated into the satellite body via embedding of electronic modules between the faces of a carbon fiber reinforced plastic (CFRP) honeycomb sandwich panel. Initial focus is on incorporation of electrical interface functionality into the satellite structure, enabling significant reductions in weight, cost, and production time. In this paper, a demonstration panel component with a function of communication interface was developed. Thermal, mechanical and electrical performances of the demonstration panel component were successfully verified in simulated space environments. Note de contenu : - DEMONSTRATION TEST PANEL: Overview of demonstration panel - Analysis of demonstration panel - DEMONSTRATION TEST RESULTS: Structural test of demonstration panel - Thermal vacuum test of demonstration panel Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23294 [article]

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Testing ultra-low outgassing silicone materials for space applications / Summer L. Sivas in SAMPE JOURNAL, Vol. 44, N° 2 (03-04/2008)

[article]  inSAMPE JOURNAL > Vol. 44, N° 2 (03-04/2008) . - p. 17-23 Titre : Testing ultra-low outgassing silicone materials for space applications Type de document : texte imprimé Auteurs : Summer L. Sivas, Auteur ; Bill Riegler, Auteur ; Brian Burkitt, Auteur ; Rob Thomaier, Auteur Année de publication : 2008 Article en page(s) : p. 17-23 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : Silicone adhesives and coatings have been used for over five decades in the Aerospace industry. Silicones ability to maintain its elasticity and low modulus over a broad temperature range, -130°C to 260°C, provides excellent utility in space, where spacecraft are often exposed to these extreme temperatures. A major drawback is silicone compounds with high vapor pressure can outgas from the polymer matrix and cause subsequent contamination of expensive equipment and devices. The National Aeronautics & Space Administration (NASA) and the European Space Agency (ESA) recommend testing low outgassing materials per ASTM E 595 prior to use in space which require a maximum Total Mass Loss (TML) of 1% and Collected Volatile Condensable Material (CVCM) of 0.1%. Although a standard for many years, many in the industry question whether these specifications are low enough. This paper characterizes Ultra Low Outgassing silicone materials with TML and CVCM one-tenth the standard ASTM E 595 specifications. ASTM E 1559 results are also examined to compare the outgassing behavior of different silicone materials. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23295 [article]

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Multi-functional sandwich composite concept for spacecraft applications / D. O. Adams in SAMPE JOURNAL, Vol. 44, N° 2 (03-04/2008)

[article]  inSAMPE JOURNAL > Vol. 44, N° 2 (03-04/2008) . - p. 38-49 Titre : Multi-functional sandwich composite concept for spacecraft applications Type de document : texte imprimé Auteurs : D. O. Adams, Auteur ; C. B. Yarger, Auteur ; N. J. Webb, Auteur ; A. Hunter, Auteur ; K. D. Oborn, Auteur ; E. Saeter, Auteur ; J. W. Wilson, Auteur ; F. F. Badavi, Auteur Année de publication : 2008 Article en page(s) : p. 38-49 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : Multi-functional sandwich composites are proposed to integrate the previously separate objectives of radiation shielding, structural integrity, damage tolerance, thermal insulation, and debris/micrometeoroid shielding into a viable structure design. Effective radiation shielding is provided through the selection of hydrogen-rich polymeric materials for the primary sandwich composite structure. using facesheet and core materials selected based on radiation shielding simulation, prototype sandwich configuration were manufactured that featured transverse reinforcements for damage tolerance and an internal Surlyn self-healing membrane layer. Flatwise tensile and core shear testing were performed to assess material compatibility between the facesheet and core layers and to identify any manufacturing-related problems. Acceptable interlaminar strengths were obtained for all configurations investigated. The results from this initial assessment suggest that multi-functional sandwich composite configurations may be used to maximize the efficiency of advanced material usage in future structural spacecraft applications. Note de contenu : - Multi-functional sandwich configurations - Radiation shielding simulation - Fabrication of multi-functional sandwich composites - Mechanical testing Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23322 [article]

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