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Space Environment Test Of Materials For Inflatable Structures
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Book Synopsis Space Environment Test of Materials for Inflatable Structures by :
Download or read book Space Environment Test of Materials for Inflatable Structures written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials being considered for use in thin-film applications of inflatable structures were exposed to a simulated space environment representing a 5-year Low Earth Orbit (LEO) and also to a 5-year Geo- synchronous Orbit (GEO). Solar absorptance and tensile test measurements were performed, pre- and posttest. The materials consisted of various thin polymer foils, including 0.0005-in. bare and metallized Kapton E, LaRC-CPl, LaRC-CP2, FEP Teflon, Triton conductive COR, and slightly thicker (0.0008 to 0.0018-in.) films of Triton TOR, Triton TOR-LM, and Triton TOR-RC. A total of 34 samples were exposed plus control and contamination monitors. Measurements of solar absorptance and tensile properties were made on samples corresponding to both Low Earth and Geosynchronous Orbit exposures. Increases in solar absorptance were observed for many of the samples. Changes in mechanical properties are also indicated by the results, but there was scatter in the test data due to the limitation of the number of samples that allowed only two of each type to be exposed to each orbital condition, and some to only GEO exposure conditions. The property changes on thin polymer films due to space environmental exposure must be considered in the design of inflatable structures. The Kapton E samples and the fluorinated polyimides (CPl and CP2) showed the least degradation. The low-modulus version of TOR (TOR-LM) appeared to be the most stable of the other films.
Author :United States. Congress. House. Committee on Science and Astronautics Publisher : ISBN 13 : Total Pages :70 pages Book Rating :4.0/5 (12 download)
Book Synopsis Inflatable Structures in Space by : United States. Congress. House. Committee on Science and Astronautics
Download or read book Inflatable Structures in Space written by United States. Congress. House. Committee on Science and Astronautics and published by . This book was released on 1961 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Progress In Astronautics and Aeronautics by : C. H. Jenkins
Download or read book Progress In Astronautics and Aeronautics written by C. H. Jenkins and published by AIAA. This book was released on 2001 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Solar Ultraviolet and Space Radiation Effects on Inflatable Materials by :
Download or read book Solar Ultraviolet and Space Radiation Effects on Inflatable Materials written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inflatable structures are being developed for use in space to take advantage of the potential for lower packaging volumes and lighter weights. These structures may consist of thin polymer membranes as well as more robust inflatable, then rigidizable, structural elements. For space applications, it must be shown that the materials can tolerate the orbital environment. This includes the effects of solar radiation and electron/proton radiation on the optical properties and mechanical response of the materials, as well as atomic oxygen effects for possible LEO applications. The highest radiation concern is with the thin-film materials, e.g., the canopy and reflector of an antenna or components of a sun shade or solar sail. All materials used in an inflatable structure need to be capable of tolerating the orbital environment and maintaining properties within the mission requirements. The approach to assessing the effects of space environment on materials begins with consideration of the orbital environment. The solar radiation spectrum is not orbital dependent, but the radiation from electrons and protons varies by orders of magnitude, depending on the particular orbit. The atomic oxygen environment is strongly dependent on altitude and solar activity. Once an orbit has been defined, the atmospheric models are available to calculate the flux and energy of the particle radiation. The orbital lifetime then is used to calculate dose levels and solar exposures that the materials must tolerate. With the environment specified, the expected dose in the materials can then be calculated. If damage thresholds are available for the particular materials involved, possible degradation can be predicted; if not, a ground or orbital test is needed. For a ground test to assess the durability of a material in orbit, the methodology is to predict the dose levels in the materials, which then drive the test parameters.
Book Synopsis A Collection of Technical Papers by :
Download or read book A Collection of Technical Papers written by and published by . This book was released on 2001 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technology for Large Space Systems by :
Download or read book Technology for Large Space Systems written by and published by . This book was released on 1979 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization and Ground Test of an Inflatable Rigidizable Space Experiment by : Steven N. Lindemuth
Download or read book Characterization and Ground Test of an Inflatable Rigidizable Space Experiment written by Steven N. Lindemuth and published by . This book was released on 2004-03-01 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: As greater capability is demanded of space-based assets, their size and complexity are growing. Inflatable, rigidizable structures offer significant improvements in the areas of weight, size, and complexity over traditional mechanically deployed systems. These structures are not well understood and little testing of them has been done in the space environment. Widespread acceptance of these technologies will not be achieved without significant reduction in the risk of using inflatable, rigidizable structures in space. The goal of this experiment is to verify and validate ground testing of small tubular truss structures for use in space. This experiment builds on previous research done in this area to reduce the risks involved in testing inflatable, rigidizable structures in space. The Rigidizable Inflatable Get-Away-Special Experiment (RIGEX) is designed to launch as a self-contained experiment on the Space Shuttle. It will inflate and rigidize three redundant experiments in the open space environment. Once these structures are deployed and rigidized, the experiment will vibrationally excite the deployed structures and record the vibrational response. This thesis produced test equipment that would meet the RIGEX Concept of Operations and conducted testing to gain an understanding of the heating, pressurization, and inflation systems of the RIGEX experiment to avoid mission failure. Appendixes contain the following: system weight tabulations, heating test results, inflation test results, success criteria, DoD SERB briefing slides, system architecture, updated NASA payload accommodations requirements, and inflation system calculations. The accommodation plan defines the technical agreement between NASA/Goddard Space Flight Center (GSFC) and the Getaway Special Canister (GAS) customer concerning the unique information needed for the preparation, flight, and disposition of the GAS payload. (12 tables, 32 figures, 32 refs.)
Book Synopsis Unconventional Flying Objects by : Hill, Paul R.
Download or read book Unconventional Flying Objects written by Hill, Paul R. and published by Hampton Roads Publishing. This book was released on 2014-06-01 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paul Hill was a well-respected NASA scientist when, in the early 1950s, he had a UFO sighting. Soon after, he built the first flying platform and was able to duplicate the UFO's tilt-to-control maneuvers. Official policy, however, prevented him from proclaiming his findings. "I was destined," says Hill, "to be as unidentified as the flying objects." For the next twenty-five years, Hill acted as an unofficial clearinghouse at NASA, collecting and analyzing sightings' reports for physical properties, propulsion possibilities, dynamics, etc. To refute claims that UFOs defy the laws of physics, he had to make "technological sense... of the unconventional object." After his retirement from NASA, Hill finally completed his remarkable analysis. This book, published posthumously, presents his findings that UFOs "obey, not defy, the laws of physics." Vindicating his own sighting and thousands of others, he proves that UFO technology is not only explainable, but attainable.
Book Synopsis Large Space Structures & Systems in the Space Station Era by :
Download or read book Large Space Structures & Systems in the Space Station Era written by and published by . This book was released on 1991 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Fibre-Reinforced Polymer (FRP) Composites for Structural Applications by : Jiping Bai
Download or read book Advanced Fibre-Reinforced Polymer (FRP) Composites for Structural Applications written by Jiping Bai and published by Woodhead Publishing. This book was released on 2022-12-05 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Fibre-reinforced Polymer (FRP) Composites for Structural Applications, Second Edition provides updates on new research that has been carried out on the use of FRP composites for structural applications. These include the further development of advanced FRP composites materials that achieve lighter and stronger FRP composites, how to enhance FRP integrated behavior through matrix modification, along with information on pretension treatments and intelligence technology. The development of new technology such as automated manufacturing and processing of fiber-reinforced polymer (FRP) composites have played a significant role in optimizing fabrication processing and matrix formation. In this new edition, all chapters have been brought fully up-to-date to take on the key aspects mentioned above. The book's chapters cover all areas relevant to advanced FRP composites, from the material itself, its manufacturing, properties, testing and applications in structural and civil engineering. Applications span from civil engineering, to buildings and the energy industry. Covers all areas relevant to advanced FRP composites, from the material itself, its manufacturing, properties, testing and applications in structural engineering Features new manufacturing techniques, such as automated fiber placement and 3D printing of composites Includes various applications, such as prestressed-FRP, FRP made of short fibers, continuous structural health monitoring using advanced optical fiber Bragg grating (FBG), durability of FRP-strengthened structures, and the application of carbon nano-tubes or platelets for enhancing durability of FRP-bonded structures
Author :C. H. Jenkins Publisher :AIAA (American Institute of Aeronautics & Astronautics) ISBN 13 : Total Pages :626 pages Book Rating :4.3/5 (91 download)
Book Synopsis Gossamer Spacecraft by : C. H. Jenkins
Download or read book Gossamer Spacecraft written by C. H. Jenkins and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 2001 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of membrane and inflatable structures technology for space applications. It provides an overview and historical review of the subject; theoretical discussion of the mechanics and physics of membrane structures, and chemical and processing issues; and applications and case studies.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Congressional Record by : United States. Congress
Download or read book Congressional Record written by United States. Congress and published by . This book was released on 1961 with total page 1130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Science and Astronautics Publisher : ISBN 13 : Total Pages :1240 pages Book Rating :4.3/5 (91 download)
Book Synopsis Hearings by : United States. Congress. House. Committee on Science and Astronautics
Download or read book Hearings written by United States. Congress. House. Committee on Science and Astronautics and published by . This book was released on 1961 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computational Mechanics by : Zhenhan Yao
Download or read book Computational Mechanics written by Zhenhan Yao and published by 清华大学出版社有限公司. This book was released on 2004 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Government Research Reports by :
Download or read book U.S. Government Research Reports written by and published by . This book was released on 1964 with total page 1416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
