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  • INSTRUMENTATION AND PHOTOGRAPHY  (3,973)
  • STRUCTURAL MECHANICS  (3,420)
  • 1985-1989  (3,333)
  • 1970-1974  (4,060)
Collection
Keywords
Years
Year
  • 1
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    Optical devices, instrumentation: A compilation (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Techniques and devices used to solve optical problems - compilation
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-SP-5941(01)
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Optical telescope technology (1970)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Design optics and technology for large spaceborne astronomical telescopes
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-SP-233 , Apr 29, 1969 - May 01, 1969; HUNTSVILLE, AL; UNITED STATES
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Electronic test instrumentation and techniques - A compilation (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Compilation of electronic test instrumentation and techniques derived from NASA programs
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-SP-5907/02/
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 4
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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
  • 5
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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
  • 6
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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
  • 7
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    NASA's technology program for active remote sensing (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: In 1992, NASA will conduct a Space Shuttle-based lidar experiment at the fundamental, first, and second harmonic wavelengths of a Nd:YAG laser. A second, NASA U-2 aircraft-based experiment will measure water vapor vertical profiles in the lower atmosphere. In addition, NASA plans three space-based (polar orbit-platform) observatories, incorporating laser and electrooptics technologies covering the 280-10,000 nm spectrum, which will have long service lives with minimal servicing requirements.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Airborne and Spaceborne Lasers for Terrestrial Geophysical Sensing; Jan 14, 1988 - Jan 15, 1988; Los Angeles, CA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Stigmatically focusing partial pressure analyzer with dual chamber ion source (1987)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The partial pressure analyzer developed has a high absolute sensitivity and high resolution. Interaction effects, as they occur in conventional partial pressure analyzers between the heating filament for the emission of electrons and the residual gas, are suppressed by removing the heating filament from the measurement area. The electron beam is generated in an auxiliary vacuum compartment, and passes subsequently through an aperture into the ionization compartment. The probability is small, therefore, that the presence of substances produced at the heating filament by chemical reactions and thermal decompositions will have disturbing effects. The high sensitivity and resolution of the instrument are obtained with the aid of an electron path configuration of unconventional characteristics.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-TT-20059 , NAS 1.77:20059
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Analytical techniques and instrumentation: A compilation (1974)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Technical information is presented covering the areas of: (1) analytical instrumentation useful in the analysis of physical phenomena; (2) analytical techniques used to determine the performance of materials; and (3) systems and component analyses for design and quality control.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-SP-5957(03)
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 10
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    Graphic arts techniques and equipment: A compilation (1974)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Technology utilization of NASA sponsored projects involving graphic arts techniques and equipment is discussed. The subjects considered are: (1) modification to graphics tools, (1) new graphics tools, (3) visual aids for graphics, and (4) graphic arts shop hints. Photographs and diagrams are included to support the written material.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-SP-5919(02)
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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