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There are a total of 2126 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Design of software for design of finite element for structural analysis
Author(s): Helfrich, Reinhard
Abstract: 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 ...
NASA Center: NASA (non Center Specific)
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N17089; Document ID: 19870007656; Report Number: NAS 1.15:88528, NASA-TM-88528
Nonlinear shell analyses of the SRB/ETA ring interface
Author(s): Knight, Norman F., Jr.
Abstract: Two-dimensional shell models of the portion of the solid rocket booster (SRB) with the external tank attachment (ETA) ring were developed using the STAGSC-1 computer code. These analyses were performed in support of the SRB ...
NASA Center: Langley Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N29883; Document ID: 19870020450; Report Number: NAS 1.15:89164, NASA-TM-89164
An experimental investigation of parasitic microstrip arrays
Author(s): Lee, Richard Q.; Acosta, Roberto; Dahele, J. S.; Lee, K. F.
Abstract: The characteristics of a parasitic microstrip antenna array with a center-fed patch are experimentally investigated. The parasitic array is composed of identical parasitic patches which are symmetrically arranged and ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N27120; Document ID: 19870017687; Report Number: E-3731, NAS 1.15:100168, NASA-TM-100168
Detection of reflector surface error from near-field data: Effect of edge diffracted field
Author(s): Cherrette, Alan R.; Lee, Shong W.; Acosta, Roberto J.
Abstract: The surface accuracy of large reflector antennas must be maintained within certain tolerances if high gain/low sidelobe performance is to be achieved. Thus the measurement of the surface profile is an important part of the ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N22874; Document ID: 19870013441; Report Number: E-3616, NAS 1.15:89920, NASA-TM-89920
Bearing-bypass loading on bolted composite joints
Author(s): Crews, J. H., Jr.; Naik, R. A.
Abstract: The effects of simultaneous bearing and bypass loading on a graphite-epoxy (T300/5208) laminate were investigated. Onset damage and ultimate strengths were determined for each test case. A finite element stress analysis was ...
NASA Center: Langley Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N25437; Document ID: 19870016004; Report Number: NAS 1.15:89153, NASA-TM-89153
On the potential impact of the newly proposed quality factors on space radiation protection
Author(s): Wilson, John W.; Townsend, Lawrence W.; Cucinotta, Francis A.
Abstract: The recently proposed changes in the defined quality factor hold great potential for easing some of the protection requirements from electrons and protons in the near-Earth environment. At the same time, the high Linear ...
NASA Center: Langley Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N16510; Document ID: 19870007077; Report Number: NAS 1.15:89055, NASA-TM-89055
The alloy undercooling experiment on the Columbia STA 61-C space shuttle mission
Author(s): Harf, Fredric H.; Piccone, Thomas J.; Wu, Yanzhong; Flemings, Merton C.; Shiohara, Yuh; Gardner, Lloyd B.; Winsa, Edward A.
Abstract: An Alloy Undercooling experiment was performed in an electromagnetic levitator during the Columbia STS 61-C mission in January 1986. One eutectic nickel-tin alloy specimen was partially processed before an equipment failure ...
NASA Center: Glenn Research Center, Marshall Space Flight Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N18643; Document ID: 19870009210; Report Number: E-3332, NAS 1.15:88909, NASA-TM-88909
Tribology theory versus experiment
Author(s): Ferrante, John
Abstract: Tribology, the study of friction and wear of materials, has achieved a new interest because of the need for energy conservation. Fundamental understanding of this field is very complex and requires a knowledge of solid-state ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N29599; Document ID: 19870020166; Report Number: E-3791, NAS 1.15:100198, NASA-TM-100198
Acoustic effects on profile drag of a laminar flow airfoil
Author(s): Shearin, John G.; Jones, Michael G.; Baals, Robert A.
Abstract: A two-dimensional laminar flow airfoil (NLF-0414) was subjected to high-intensity sound (pure tones and white noise) over a frequency range of 2 to 5 kHz, while immersed in a flow of 240 ft/sec (Rn of 3 million) in a quiet ...
NASA Center: Langley Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N30155; Document ID: 19870020722; Report Number: NAS 1.15:100505, NASA-TM-100505
The use of electrical discharge for ignition and control of combustion of solid propellants
Author(s): Tachibana, Takeshi; Kobayashi, Tsuruo; Matsuda, Takashi; Kimura, Itsuro
Abstract: As the first step of the study of the combustion control of solid propellants by electrical discharges, the effects of an arc discharge, which flows along the burning surface, on the burning rate and on the increase of ...
NASA Center: NASA (non Center Specific)
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N15317; Document ID: 19870005884; Report Number: NAS 1.15:88548, NASA-TM-88548
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