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  • Articles  (33)
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  • Springer  (33)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (33)
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  • Articles  (33)
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  • 1
    Electronic Resource
    Electronic Resource
    A consistent finite element model for the two-dimensional continuum (1970)
    Springer
    Archive of applied mechanics 39 (1970), S. 375-382 
    Details
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Übersicht Das Verfahren, ein Kontinuum durch finite Elemente anzunähern wird vom Standpunkt des Prinzips der virtuellen Arbeiten untersucht. Es wird gezeigt, daß die üblichen Knotenpunktsgleichungen für dreieckförmige Elemente eine Folge des stückweise konstanten Verformungsfeldes sind. Auf diese Weise wird sichergestellt, daß viele Ergebnisse der allgemeinen Kontinuumstheorie unmittelbar auf das aus endlichen Elementen aufgebaute Modell übertragen werden können. Gleichzeitig werden die Beziehungen zwischen beiden Modellen geklärt.
    Notes: Summary The finite element approximation to the continuum problem is examined from the viewpoint of the principle of virtual work. It is shown that the usual nodal equilibrium equations for triangular elements are a consistent consequence of a piecewise constant strain field, thus guaranteeing that many results of general continuum theory can be directly applied to the finite element model, and also clarifying the relation between the two models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00538758
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  • 2
    Electronic Resource
    Electronic Resource
    Einführung von Carboxylgruppen in vernetztes Polystyrol (1977)
    Springer
    Colloid & polymer science 255 (1977), S. 620-621 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01549863
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of carbon dioxide on the reaction of YBa2Cu2O6.5+x with water vapour (1993)
    Springer
    Journal of materials science 28 (1993), S. 5155-5160 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The influence of carbon dioxide on the reaction between YBa2Cu3O6.5+x powder and air saturated with water vapour was studied. Superconductor powder samples were exposed to air that was saturated with water vapour which (a) was free of CO2, (b) was saturated with CO2, and (c) contained ambient levels of CO2. In another experiment, the effect of pure, dry CO2 (1 atmosphere partial pressure) was studied. The time variations of sample weight, oxygen content and X-ray diffraction (XRD) spectrum were determined. In water-saturated air, the rate of decrease of the oxygen content in YBa2Cu3O6.5+x decreased with increasing partial pressure of CO2. XRD was used to identify the reaction products. Higher partial pressures of CO2 favour the formation of a barrier layer (BaCO3) which inhibits the reaction of the underlying YBa2Cu3O6.5+x with water vapour. Very little decrease in oxygen content occurred on exposure of YBa2Cu3O6.5+x to pure, dry CO2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00570056
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  • 4
    Electronic Resource
    Electronic Resource
    Production of continuous filaments of melt-textured YBa2Cu3O7-δ superconductor (1991)
    Springer
    Journal of materials science 10 (1991), S. 1362-1365 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00735679
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  • 5
    Electronic Resource
    Electronic Resource
    Production of TiB2 from a precursor containing carbon coated TiO2 and B4C (2000)
    Springer
    Journal of materials science 19 (2000), S. 667-669 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006706510384
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  • 6
    Electronic Resource
    Electronic Resource
    Analysis of mass transport in the diffusional creep of polycrystalline MgO-FeO-Fe2O3 solid solutions (1975)
    Springer
    Journal of materials science 10 (1975), S. 200-204 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An analysis of mass transport in the diffusional creep of iron-doped, polycrystalline MgO was conducted. Creep regimes in which magnesium grain boundary, oxygen grain boundary, and magnesium-lattice diffusion were rate-controlling were identified. An analytical procedure was developed for the estimation of the diffusion constants for these three processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00540343
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  • 7
    Electronic Resource
    Electronic Resource
    On chlorosulphonation and the electron microscopy of polyethylene (1977)
    Springer
    Journal of materials science 12 (1977), S. 2065-2075 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract It is shown that chlorosulphonation is a major aid to the electron microscopy of polyethylene for various samples which had mostly been crystallized at high pressures and included at least a proportion of the so-called chain-extended form. It is confirmed that sheets of excess electron density are produced at lamellar surfaces, but also including lateral surfaces. This is due primarily to the incorporation of chlorine and sulphur rather than to added uranium. The time to achieve an overall reaction varies sensitively with morphology, decreasing as the number of diffusion channels increases. Crystallinity is gradually lost, but sufficient crystals remain when a sample has become uniform, and in their initial orientations, for diffraction studies to be possible. The technique has been used to demonstrate that, during melt crystallization, the thickness of one lamella changes in response to altered growth conditions. This is direct confirmation that lamellar thickness is determined by secondary nucleation at the growth front. The tapered profile of a growing lamella previously observed in thick crystals of various polymers has been observed for chain-folded polyethylene lamellae, providing further evidence that this is a general feature of melt growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00561980
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  • 8
    Electronic Resource
    Electronic Resource
    Creep mapping in a polycrystalline ceramic: application to magnesium oxide and magnesiowustite (1977)
    Springer
    Journal of materials science 12 (1977), S. 1598-1604 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The construction of deformation mechanism maps for a polycrystalline ionic solid in which anion and cation transport are coupled has been demonstrated. Because of anioncation ambipolar coupling, two regimes of Coble creep are possible in systems where anion grain boundary transport is rapid: (1) rate-controlled at low temperatures and small grain sizes by cation grain-boundary diffusion, and (2) rate-limited at high temperatures and large grain sizes by anion grain-boundary diffusion. A new type of deformation mechanism map was introduced in which the temperature and grain size were primary variables. This map was shown to be particularly useful for materials which deform primarily by diffusional creep mechanisms. Ambipolar diffusional creep theory was used to construct several deformation mechanism maps for polycrystalline MgO and magnesiowustite over wide ranges of stress, grain size, temperature and composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00542810
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  • 9
    Electronic Resource
    Electronic Resource
    On real and ideal materials (1971)
    Springer
    Experimental mechanics 11 (1971), S. 12-18 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Various plasticity theories are discussed as models for the behavior of real materials. The simple rigid/perfectly plastic model is shown to be a reasonable first approximation. Once the theory for this model has been developed, it is easily modified to account for strain hardening and elastic effects. It is shown in various examples that, for loads less than the rigid/perfectly plastic limit load, strain hardening has a negligible effect, whereas for greater loads elastic strains can reasonably be neglected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02320705
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  • 10
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    Unknown
    A consistent finite element model for the two-dimensional continuum (1970)
    Springer
    Details
    Publication Date: 1970-01-01
    Print ISSN: 0020-1154
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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