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  • LUNAR AND PLANETARY EXPLORATION  (3,082)
  • Humans  (1,943)
  • STRUCTURAL MECHANICS  (1,910)
  • SPACE SCIENCES
  • 1985-1989  (6,935)
Collection
Keywords
Publisher
Years
Year
  • 1
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    Voyager's Last Encounter (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: This video describes Voyager 2's encounter with Neptune. Computer animation and actual data convey Voyager's discoveries such as turbulent storms and dark spots in Neptune's atmosphere, six new moons, Neptune's three rings, and the presence of frozen methane on Triton, as researchers at NASA's Jet Propulsion Laboratory describe Voyager's achievements.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: ASR-251 , NASA-TM-109361 , NONP-NASA-VT-94-198208
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Voyager Encounters Uranus (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Early results from Voyager's pass of Uranus and its moon, Miranda, are shown.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: ASR-240 , NASA-TM-109619 , NONP-NASA-VT-93-190417
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Lunar Base Concepts (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: This videotape discusses NASA's plans for a lunar base. Additionally, the videotape features interviews with George Keyworth, James Beggs, and Harrison Schmidt.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: ASR-236 , NASA-TM-109607 , NONP-NASA-VT-93-190405
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    NASA's plans for manned missions to the moon and Mars (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Issues, problems, and potential solutions of the lunar and Mars missions which will be undertaken in the first decade of the next century are discussed. Arguments are made for the feasibility and usefulness of a lunar base, and an evolutionary approach to a manned Mars mission involving a preliminary mission to Phobos is outlined. The Shuttle Z concept for both moon and Mars missions which involves a dual use of a spacecraft transfer stage operating also as a booster third stage is defined.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Spaceflight (ISSN 0038-6340); 31; 297-302
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Planetary cartography in the next decade: Digital cartography and emerging opportunities (1989)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Planetary maps being produced today will represent views of the solar system for many decades to come. The primary objective of the planetary cartography program is to produce the most complete and accurate maps from hundreds of thousands of planetary images in support of scientific studies and future missions. Here, the utilization of digital techniques and digital bases in response to recent advances in computer technology are emphasized.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-4092 , NAS 1.15:4092
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Fatigue behavior of 5Ni-Cr-Mo-V steel weldments containing fabrication discontinuities (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The applicability of linear elastic fracture mechanics to characterize the fatigue behavior of high-strength steel weldments containing lack-of-penetration (LOP) and slag/lack-of-fusion (S/LOF) discontinuities is explored. Full penetration, double-V butt welds with reinforcements removed were tested under zero-to-tension axial loading. Various filler metals and welding techniques were used. Both sound welds and welds containing discontinuities were cycled to failure. Where possible, cycles to crack initiation were estimated by strain gage measurements. The fracture mechanics approach was successful in correlating the fatigue lifetimes of specimens containing single LOP discontinuities of varying size. However, the fatigue behavior of specimens containing multiple S/LOF discontinuities proved to be much more complex and difficult to analyze.
    Keywords: STRUCTURAL MECHANICS
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Postbuckling behavior of fiber reinforced plates and curved panels (1987)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Results obtained on the postbuckling behavior of plates and curved panels using the NOLIN computer program are reported. As an example, the postbuckling behavior of a flexible, isotropic and quadrangular plate is solved and the results are found to be accurate and relibale in comparison with those in the literature. The fatigue-deformation behavior of a rectangular CKL plate is measured, and the results are compared with those from NOLIN and other computer programs. A slightly curved panel with optimized layering is studied.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TT-20094 , NAS 1.77:20094
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Advances in Planetary Geology (1987)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The surface of Mars displays a broad range of channel and valley features. There is as great a range in morphology as in scale. Some of the features of Martian geography are examined. Geomorphic mapping, crater counts on selected surfaces, and a detailed study of drainage basins are used to trace the geologic evolution of the Margaritifer Sinus Quandrangle. The layered deposits in the Valles Marineris are described in detail and the geologic processes that could have led to their formation are analyzed.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-89871 , NAS 1.15:89871
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Cratering history of Miranda (1987)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The surface of the southern hemisphere of Miranda imaged by Voyager 2 is divisible into two general types of terrain: cratered terrain, characterized by numerous craters and undulating intercrater plains; and basins, circular to rectangular areas of complex morphology having large-scale albedo markings. To determine the relative ages of the terrains and the length of geological activity, crater-frequency data were compiled for various parts of the cratered terrain and basins. Crater-frequency data indicate that the cratered terrain is the oldest terrain on Miranda and that it was locally resurfaced.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Reports of Planetary Geology and Geophysics Program, 1986; p 9-11
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Design of Software for Design of Finite Element for Structural Analysis (1987)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The concepts of software engineering which allow a user of the finite element method to describe a model, to collect and to check the model data in a data base as well as to form the matrices required for a finite element calculation are examined. Next the components of the model description are conceived including the mesh tree, the topology, the configuration, the kinematic boundary conditions, the data for each element, and the loads. The possibilities for description and review of the data are considered. The concept of the segments for the modularization of the programs follows the components of the model description. The significance of the mesh tree as a globular guiding structure will be understood in view of the principle of the unity of the model, the mesh tree, and the data base. The user-friendly aspects of the software system will be summarized: the principle of language communication, the data generators, error processing, and data security.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TM-88528 , NAS 1.15:88528
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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