ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    A new hybrid stress element method for the analysis of elastoplastic solids (1992)
    Springer
    Acta mechanica solida Sinica 5 (1992), S. 219-233 
    Details
    ISSN: 0894-9166
    Keywords: elastoplastic ; hybrid stress element ; equivalent stress ; equivalent plastic strain ; non-conforming displacement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Based on a modified Hellinger/Reissner variational principle which includes the equivalent stress, equivalent plastic strain and non-conforming displacement increments as independent variables, a quadrilateral isoparametric hybrid stress element for the analysis of elastoplastic problem is proposed. By this formulation, the yield criterion and flow rule are satisfied in an average sense and greater accuracy can be obtained by using non-conforming displacement. A numerical example is presented to show that the present model has high accuracy and computational effectiveness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02207886
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A study of the hybrid element methods for stress analysis (1990)
    Springer
    Acta mechanica solida Sinica 3 (1990), S. 301-306 
    Details
    ISSN: 0894-9166
    Keywords: hybrid element method ; displacement model ; hybrid model
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A new functional which forms the basis of an improved hybrid element formulation is proposed. The variables for the functional include stresses, strains and displacements, and the displacements and stresses are further decomposed into two parts respectively. The proposed new formulation appears to be particularly suitable for improving conforming models. The relationship between the new hybrid elements and the conventional displacement elements are also explored in this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02206399
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Particle acceleration, X-rays, and gamma-rays from winds (1994)
    Springer
    Astrophysics and space science 221 (1994), S. 295-307 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The instability of the line-driven winds of hot stars leads to the formation of strong shocks. These shocks not only emit thermal X-rays, but also accelerate a small fraction of the thermal electrons and ions to relativistic energies. Synchrotron radiation from these energetic particles can account for the non-thermal radio emission observed from some hot stars, and can also explain the hard X-rays detected in theEinstein X-ray spectra. Our calculations indicate that theγ-ray emission from non-thermal particles should be detectable by GRO. The detection (or non-detection) of these emissions over a wide energy range, from the radio toγ-rays, should provide a great deal of information on the structure of the unstable winds and the physics of particle acceleration by shocks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01091161
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Nonthermal radio emission from hot star winds (1994)
    Springer
    Astrophysics and space science 221 (1994), S. 259-273 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Nonthermal radio emission has been observed from some of the most luminous hot star winds. It is understood to be synchrotron radiation of the relativistic electrons in the winds. To understand how the electrons are accelerated to such high energies and to correctly explain the observed radio flux and spectra require an exhaustive investigation of all the relevant physical processes involved and possibly point to a complex wind structure. In this paper we discuss the logical path toward a comprehensive model of the nonthermal radio emission from hot star winds. Based on the available observational data and fundamental theoretical considerations, we found that the only physically viable and self-consistent scenario is:the nonthermal radio emission is synchrotron radiation of relativistic electrons ⇄ the electrons are accelerated by shocks via the first-order Fermi mechanism ⇄ the acceleration has to be in situ in the radio emitting region ⇄ the shocks formed at the base of the winds have to propagate to beyond the radio photosphere).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01091158
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    facet.materialart.
    Unknown
    Nonthermal radio emission from hot star winds (1994)
    Springer
    Details
    Publication Date: 1994-11-01
    Print ISSN: 0004-640X
    Electronic ISSN: 1572-946X
    Topics: Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 6
    facet.materialart.
    Unknown
    Particle acceleration, X-rays, and gamma-rays from winds (1994)
    Springer
    Details
    Publication Date: 1994-11-01
    Print ISSN: 0004-640X
    Electronic ISSN: 1572-946X
    Topics: Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...