Nonlinear Bending Stability of a Long Flexible Cylindrical Shell with Geometrical Imperfections

The authors put forward a numerical approach to determination of nonlinear bending stability of a long flexible cylindrical shell with geometrical imperfections. The shell wall imperfection in the form of bulging in long half-wave is modeled using a software package for finite-element analysis. Prebuckling and postbuckling behavior of an imperfect shell in bending is studied. The critical normal stress in the shell compression zone is plotted vs. the imperfection amplitude. The bending stability region is determined for a shell with geometrical imperfections.

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Correspondence to O. V. Kostina.

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Translated from Problemy Prochnosti, No. 2, pp. 140 – 147, March – April, 2016.

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Bazhenov, V.A., Luk’yanchenko, O.O., Kostina, O.V. et al. Nonlinear Bending Stability of a Long Flexible Cylindrical Shell with Geometrical Imperfections. Strength Mater 48, 308–314 (2016). https://doi.org/10.1007/s11223-016-9766-z

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Keywords

  • nonlinear stability
  • flexible cylindrical shell
  • geometrical imperfection
  • finite-element method
  • bending