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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 38 (1969), S. 329-342 
    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 Es werden die Deformationen einer einfach gelagerten rechteckigen Platte berechnet, die über den starren Balken einer Prüfmaschine auf einachsigen Druck in der Plattenebene belastet wird. Der belastete Rand erleidet dabei eine gleichmäßige Verschiebung, jedoch wird die Lastverteilung längs dieses Randes um so ungleichförmiger, je mehr die Platte ausbeult. Zustandsgleichungen und die Bedingungen für Gleichgewicht und Verträglichkeit werden für elastisch verformbares und stationär kriechendes Material aufgestellt, wobei die numerische Lösung nur für den letztgenannten Fall angegeben wird. Die Ergebnisse zeigen, daß im vorliegenden Fall die kritische Zeit der einfachen Theorie, bei der eine gleichförmige Lastverteilung angenommen wird, nicht existiert. Dennoch ist die kritische Zeit ein gutes Gefahren-Kriterium, weil die Deformationen der Platte nach der kritischen Zeit erheblich rascher anwachsen als davor.
    Notes: Summary The deformations of a simply supported rectangular plate are calculated when a uniaxial inplane compressive load is applied to it by means of a rigid platen of a testing machine. This kind of loading enforces a uniform in-plane displacement of the loaded edge and has the consequence that the distribution of the load along the edge becomes increasingly nonuniform as the buckling of the plate becomes more pronounced. The equilibrium, constitutive and compatibility equations are written for a material that deforms elastically and in consequence of steady-state creep but the numerical solution is given for a material that can deform only because of creep. The solution shows that the critical time of the simpler theory in which the load is distributed uniformly does not exist in the case treated here. Nevertheless the critical time is a good indicator of danger because the deformations of the plate increase much more rapidly after the critical time than before.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 28 (1959), S. 89-98 
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Graphic methods and simple amalytic formulas are presented for the determination of the quantities of greatest interest in the elastic, plastic and creep buckling of columns. The results are rigorously valid only for columns of idealized I section and they represent good approximations in the case of extruded and built up sections.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta mechanica 8 (1969), S. 116-125 
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Die Kriechverformungen einer Kreiszylinderschale unter der Wirkung gleichmäßigen axialen Druckes werden berechnet. Die Enden der Schale sind drehbar gelagert; die Verformungen werden zylindersymmetrisch angenommen. Solche Verformungen wurden bei mäßig dicker Schale beobachtet. Die Lösung wird in Gestalt trigonometrischen Reihen für die Spannungen und Verschiebungen erhalten.
    Notes: Summary The creep deformations of a circular cylindrical shell are calculated under the action of uniform axial compression. The edges of the shell of finite length are simply supported and the deformations are assumed to be axially symmetric. Such axisymmetric deformations have been observed to occur when the shell is moderately thin-walled. The solution is obtained in the form of trigonometric series for the stresses and displacements.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 12 (1972), S. 372-376 
    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 Fifteen near-perfect electroformed nickel cylindrical shells of highR/t ratios have been buckled by axial compression using a special loading-rig system. Buckling-stress values averaged 85 percent, and ranged from 80 to 96 percent, of the classical theoretical bucklingstress value. The loading rig described in this report makes use of a simple procedure for accurately aligning the thin shell with the load axis and, also, for maintaining the circularity of the shell at its end by accommodating for slightly different diameters, with the use of tapered circular end caps which provide exact fits in each case. The rig also provides a setup in which shells may be free to twist, tip and translate, or be restrained from these motions. Comparison between restrained and unrestrained tests reveoled no noticeable change in the buckling load. However, with the restraining mechanism, slightly higher postbuckling loads, repeated buckling loads and an increased number of circumferential waves resulted.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 6 (1966), S. 529-537 
    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 The results of buckling tests on uniformly heated, clamped, thin circular cylindrical shells are presented and discussed. Particular attention is paid to both the actual buckling process and the ensuing post-buckling behavior. Load vs. end-shortening curves are included. The possibility of “snap-through” buckling which occurs at a value of end shortening greater than that corresponding to the maximum supported load is experimentally verified. A comparison of the present experimental results with available theory is made. It is observed that the experimental values of the buckling temperature can be substantially greater than the temperatures calculated by linear theory from the experimental buckling loads; however, the buckling stresses are the same whether the loading is thermal or mechanical.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 7 (1967), S. 281-288 
    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 Complete spherical shells with radius-to-thickness ratios of from 1570 to 2120 were produced by electroforming. For specimens of good quality and for optimum testing conditions, buckling pressures up to 86 percent of the classical value were obtained. The effect of loading-system characteristics was examined by pressurizing spherical shells in rigid and soft systems and no difference in buckling pressure was observed. It was found that buckling behavior is strongly influenced by the nature and severity of flaws or imperfections; i.e., low buckling pressures can be correlated with the presence of severe flaws or nonuniformities.
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  • 7
    Publication Date: 1959-01-01
    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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  • 8
    Publication Date: 1969-01-01
    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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  • 9
    Publication Date: 1972-08-01
    Print ISSN: 0014-4851
    Electronic ISSN: 1741-2765
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 10
    Publication Date: 1967-07-01
    Print ISSN: 0014-4851
    Electronic ISSN: 1741-2765
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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