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  • AIRCRAFT PROPULSION AND POWER  (1)
  • Silicon band structure  (1)
  • 1975-1979  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Electronic structure of silanes in the semi-empirical equivalent orbital method (1975)
    Springer
    Theoretical chemistry accounts 40 (1975), S. 237-244 
    Details
    ISSN: 1432-2234
    Keywords: Silicon band structure ; Silanes ; Vertical ionization potentials
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The problem of the prediction of the valence IPs for silanes is considered. It is shown that the data on the silicon band structure combined with the photoelectron spectra of SiH4, and Si2H6 permit to obtain the parameter scale, which includes all the nearest neighbour, second neighbour and the main third neighbour interaction parameters. Using the derived parameter scale the vertical ionization potentials of Si3H8, SiH(SiH3)3, Si(SiH3)4, the infinite polysilane valence band structure and the inner a 1g level for disilane are calculated. All the calculated levels are located above − 20 eV and are expected to be measurable by the He (I) photoelectron spectroscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00548458
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Unknown
    Interactive multi-mode blade impact analysis (1978)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The theoretical methodology used in developing an analysis for the response of turbine engine fan blades subjected to soft-body (bird) impacts is reported, and the computer program developed using this methodology as its basis is described. This computer program is an outgrowth of two programs that were previously developed for the purpose of studying problems of a similar nature (a 3-mode beam impact analysis and a multi-mode beam impact analysis). The present program utilizes an improved missile model that is interactively coupled with blade motion which is more consistent with actual observations. It takes into account local deformation at the impact area, blade camber effects, and the spreading of the impacted missile mass on the blade surface. In addition, it accommodates plate-type mode shapes. The analysis capability in this computer program represents a significant improvement in the development of the methodology for evaluating potential fan blade materials and designs with regard to foreign object impact resistance.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-CR-159462
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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