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  • Polymer and Materials Science  (24,080)
  • INSTRUMENTATION AND PHOTOGRAPHY  (3,739)
  • STRUCTURAL MECHANICS  (2,553)
  • 1975-1979  (15,530)
  • 1970-1974  (14,842)
Collection
Keywords
Publisher
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
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    NASA TECHNICAL REPORTS
  • 4
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    Use of piezoelectric multicomponent force measuring devices in fluid mechanics (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The characterisitics of piezoelectric multicomponent transducers are discussed, giving attention to the advantages of quartz over other materials. The main advantage of piezoelectric devices in aerodynamic studies is their ability to indicate rapid changes in the values of physical parameters. Problems in the accuracy of measurments by piezoelectric devices can be overcome by suitable design approaches. A practical example is given of how such can be utilized to measure rapid fluctuations of fluid forces exerted on a circular cylinder mounted in a water channel.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-TM-75444
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Possibilities and limitations of rod-beam theories (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Rod-beam theories are founded on hypotheses such as Bernouilli's suggesting flat cross-sections under deformation. These assumptions, which make rod-beam theories possible, also limit the accuracy of their analysis. It is shown that from a certain order upward terms of geometrically nonlinear deformations contradict the rod-beam hypotheses. Consistent application of differential geometry calculus also reveals differences from existing rod theories of higher order. These differences are explained by simple examples.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TM-75466 , DFVLR-FB-78-13
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Spectral transformation in the SOFI complex for processing photographic images on the ES computer, part 1 (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A description is given of three programs catalogued in the form of object modules in the library of a system for processing photographic images computer. PFT is the subprogram of the multi-dimensional BPF of real-valued information, in the operative computer memory. INRECO is a subprogram-interface between the real and complex formats for representing two-dimensional spectra and images. FFT2 is a subprogram for calculating the correlation functions of the image using the previous subprograms.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-TM-75632-PT-1 , PR-394
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    The NASTRAN user's manual (level 17.0) (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: NASTRAN embodies a lumped element approach, wherein the distributed physical properties of a structure are represented by a model consisting of a finite number of idealized substructures or elements that are interconnected at a finite of grid points, to which loads are applied. All input and output data pertain to the idealized structural model. The general procedures for defining structural models are described and instructions are given for each of the bulk data cards and case control cards. Additional information on the case control cards and use of parameters is included for each rigid format.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-SP-222(04)
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Research needs in aerospace structural dynamics (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The perspective of a NASA Ad Hoc Study Committee on future research needs in structural dynamics within the aerospace industry is presented. It identifies the common aspects of the design process across the industry and establishes the role of structural dynamics in it through a discussion of various design considerations having their basis in structural dynamics. The specific structural dynamics issues involved in these considerations are identified and assessed as to their current technological status and trends. Projections of future requirements based on this assessment are made and areas of research to meet them are identified.
    Keywords: STRUCTURAL MECHANICS
    Type: AIAA PAPER 79-0826 , Structures, Structural Dynamics, and Materials Conference; Apr 04, 1979 - Apr 06, 1979; St. Louis, MO
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Rigidity of lattice domes (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The means of ensuring total rigidity of lattice domes, using comparison with solid shells of 1-3 layers are discussed. Irregularities of manufacture, processing, and other factors are considered, as they relate to diminution of rigidity. The discussion uses the concepts of upper and lower critical loads on the structure in question.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TM-75387
    Format: application/pdf
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  • 10
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    Can acoustic emission detect the initiation of fatigue cracks: Application to high-strength light alloys used in aeronautics (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Acoustic emission was used for the detection of fatigue cracking in a number of high-strength light alloys used in aeronautical structures. Among the features studied were: the influence of emission frequency, the effect of surface oxidation, and the influence of grains. It was concluded that acoustic emission is an effective nondestructive technique for evaluating the initiation of fatigue cracking in such materials.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TM-75306
    Format: application/pdf
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