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  • 1985-1989  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Asymptotic integration of elasto-plastic constitutive relation for isotropic hardening material and its computational precision (1988)
    Springer
    Acta mechanica solida Sinica 1 (1988), S. 419-430 
    Details
    ISSN: 0894-9166
    Keywords: asymptotic integration ; isotropic hardening material ; iteration ; constitutive relation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract In this paper, an asymptotic expansion solution of the constitutive equation of hardening materials is presented. Its 1st asymptotic integration can give an approximate one with good enough accuracy and the second asymptotic one improves the precision of solutions further. The steps of its algorithms are fairly simple and clear, and its computational workload is considerably reduced. It can be easily incorporated into a general purpose finite element program.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02207621
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    Paper (German National Licenses)
    Fulltext
  • 2
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    A selective modal scheme for the analysis of EM coupling into or radiation from large open-ended waveguides (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: A selective modal scheme is proposed to efficiently analyze the problem of high-frequency (HF) electromagnetic (EM) coupling/penetration into or radiation from open-ended waveguides. This scheme is based on the phenomenon that at sufficiently high frequencies, the modes which contribute most significantly to the fields coupled into the waveguide are those whose modal ray directions are most nearly parallel to the incident-wave direction. This concept is illustrated by calculating the EM radiation and backscattering from open-ended parallel-plate, rectangular, circular, and sectoral waveguide geometries. The calculations use the usual geometrical optics, aperture field, and Ufimtsev edge current techniques. Also included are some measured results which further verify the accuracy of the above computations.
    Keywords: COMMUNICATIONS AND RADAR
    Type: IEEE Transactions on Antennas and Propagation (ISSN 0018-926X); 36; 84-96
    Format: text
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    NASA TECHNICAL REPORTS
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