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The stability boundary of systems with one degree of freedom (Part II)

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Sommario

Questa nota rappresenta un'integrazione ad una precedente (Parte I) e si propone di accrescere il valore applicativo della teoria ivi sviluppata. Si studiano punti critici singolari che possono presentarsi in certe circostanze, e le conseguenze della loro presenza sulla forma del dominio di stabilità. Si dimostra che se tali punti esistono, appartengono in generale a piani nello spazio dei carichi e che la loro ubicazione può essere facilmente determinata con un semplice procedimento fondato sulla considerazione degli autovalori. La risoluzione di un esempio e risultati sperimentali illustrano le conclusioni raggiunte in sede teorica.

Summary

This paper is designed as a supplement to Part I with a view to adding to the practical value of the theory presented there. Singular critical points which may arise under certain circumstances, and the effect of their presence on the shape of the stability boundary are investigated. It is shown that such points, if they exist, will generally lie on planes in the loading space, and that a simple linear eigenvalue approach will readily yield their location. An example is solved for illustration, and the results of an experiment are reported.

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References

  1. K. Huseyin,The stability boundary of systems with one-degree-of-freedom, Part I, Meccanica, Vol. 5, no. 4, 1970.

  2. W. T. Koiter, Proc. Symp.:Nonlinear Problems, edited by R. E. Langer, The University of Wisconsin Press, p. 257, 1963.

  3. J. M. T. Thompson,Discrete branching points in the general theory of elastic stability, J. Mech. Phys. Solids, 13, 295, 1965.

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  4. J. Roorda,On the buckling of symmetric structural systems with first and second order imperfections, Int. J. Solids Struct., 4, 1137, 1968.

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Huseyin, K. The stability boundary of systems with one degree of freedom (Part II). Meccanica 5, 312–316 (1970). https://doi.org/10.1007/BF02145656

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