Behavior of Shape Memory Epoxy Foams in Microgravity: Experimental Results of STS-134 Mission

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• 作者：Loredana Santo (1) loredana.santo@uniroma2.it
  Fabrizio Quadrini (1) fabrizio.quadrini@uniroma2.it
  Erica Anna Squeo (1) squeo@ing.uniroma2.it
  Ferdinando Dolce (2) ferdinando.dolce@aeronautica.difesa.it
  Gabriele Mascetti (3) gabriele.mascetti@asi.it
  Delfina Bertolotto (3) delfina.bertolotto@asi.it
  Walter Villadei (4) walter.villadei@aeronautica.difesa.it
  Pier Luigi Ganga (5) p.ganga@kayser.it
  Valfredo Zolesi (5) v.zolesi@kayser.it
• 关键词：Shape memory polymers – ; Smart materials – ; Epoxy foams – ; Shape recovery – ; International Space Station
• 刊名：Microgravity Science and Technology
• 出版年：2012
• 出版时间：September 2012
• 年：2012
• 卷：24
• 期：4
• 页码：287-296
• 全文大小：1,014.4 KB
• 参考文献：1. Di Prima, M.A., Lesniewski, M., Gall, K., McDowell, D.L., Sanderson, T., Campbell, D.: Thermo-Mechanical behavior of epoxy shape memory polymer foams. Smart Mater. Struct. 16, 2330–2340 (2007)
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• 作者单位：1. Department of Mechanical Engineering, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy2. Italian Air Force, Aeroporto Militare 鈥淢. De Bernardi鈥? Via Pratica di Mare, Pomezia, 45, 00040 Rome, Italy3. Italian Space Agency, Viale Liegi, 26, 00198 Rome, Italy4. Italian Air Force, Head Quarter, Viale dell鈥橴niversit脿, 4, 00185 Rome, Italy5. Kayser Italia s.r.l., via di Popogna, 501, 57128 Livorno, Italy
• ISSN：1875-0494

文摘

Shape memory epoxy foams were used for an experiment on the International Space Station to evaluate the feasibility of their use for building multi-functional composite structures. A small equipment was designed and built to simulate the actuation of simple devices in micro-gravity conditions: three different configurations (compression, bending and torsion) were chosen during the memory step of the foams so as to produce their recovery on ISS. Two systems were used for the experimentation to avoid damages of the flight model during laboratory tests; however a single ground experiment was performed also on the flight model before the mission. Micro-gravity does not affect the ability of the foams to recover their shape but it poses strong limits for the heating system design because of the difference in heat transfer on earth and in orbit. A full recovery of the foam samples was not achieved due to some limitations in the maximum allowable temperature on ISS for safety reasons: anyway a 70% recovery was also measured at a temperature of 110掳C. Ground laboratory experiments showed that 100% recovery could be reached by increasing the maximum temperature to 120掳C. Experiment results have provided many useful information for the designing of a new structural composite actuator by using shape memory foams.