The work presents a database on viscoelastic materials for vibration damping. This database includes all the required informations necessary to the choice of an appropriate material dedicated to vibration damping on satellite components. Twenty high performances materials extracted from commercial products have been retained as major candidates for the space applications. Some criteria from vibration attenuation considerations are also integrated, as insulation, damping, housing, coating. The set of materials groups together the main chemical families as : polyurethane, silicone, synthetic, rubber, acrylic, with specific techniques of irnplementation as: gluing, moulding, polymerisation. But the main choice criterion is the viscoelastic properties of the material: the elastic modulus E and the damping tg delta depend on the frequency in the entire temperature range. In the purpose of a better knowledge of the material behaviour in a space environment, three specific tests are realised : outgazing, irradiation an thermal cycling. Each one of the twenty selected materials is characterised with the viscoanalyzer before the space environment qualification tests. These results are used as references for estimating the evolution of the mechanical dynamic properties after the tests. In the purpose of a better knowledge of the material behaviour in a space environment, three specific tests are realised : outgazing, irradiation and thermal cycling under vacuum. The outgazing test were performed following the Micro VCM standard (125 deg C and 10 exp (-5) Torr during 24 hours). Radiations were simulated by equivalent ionising doses of e- particles (10, 100, 1000 and 10000 Krad). Ageing under vacuum has carried out by sweeping between 5 to 10 deg C/min with steps 15-20 min under vacuum of 10 exp(-5) Torr. The database includes apart from these specific test informations, some other complementary informations specific for space applications as: static physical mechanical characteristics thermal coefficient, dielectric constants, storage conditions, commercial data.
Spacemat. A database on viscoelastic materials dedicated to damping of microvibrations
SPACEMAT - Eine Datenbank für viskoelastische Werkstoffe zur Vibrationsdämpfung
Spacecraft Structures, Materials & Mechanical Testing, International Conference, European Space Agency, 1996 ; 1021-1023
1996
3 Seiten, 4 Bilder, 1 Quelle
Conference paper
English
Spacemat: a database on viscoelastic materials dedicated to damping of microvibrations
British Library Online Contents | 1996
|SPACEMAT: a database on viscoelastic materials dedicated to damping of microvibrations
British Library Conference Proceedings | 1996
|Influence of Microvibrations on Spacecraft Performances
NTIS | 1991
|On ground and in orbit microvibrations measurement comparison
British Library Conference Proceedings | 1999
|SOHO Microvibrations: Analyses, Tests and Flight Results
British Library Online Contents | 1997
|