Steel and Composite Structures

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Buckling behavior of composite cylindrical shells with cutout considering geometric imperfection

  • Heidari-Rarani, M. (Department of Mechanical Engineering, Faculty of Engineering, University of Isfahan) ;
  • Kharratzadeh, M. (Department of Mechanical Engineering, Faculty of Engineering, University of Isfahan)
  • Received : 2018.01.07
  • Accepted : 2019.02.10
  • Published : 2019.02.25
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Abstract

Creating different cutout shapes in order to make doors and windows, reduce the structural weight or implement various mechanisms increases the likelihood of buckling in thin-walled structures. In this study, the effect of cutout shape and geometric imperfection (GI) is simultaneously investigated on the critical buckling load and knock-down factor (KDF) of composite cylindrical shells. The GI is modeled using single perturbation load approach (SPLA). First, in order to assess the finite element model, the critical buckling load of a composite shell without cutout obtained by SPLA is compared with the experimental results available in the literature. Then, the effect of different shapes of cutout such as circular, elliptic and square, and perturbation load imperfection (PLI) is investigated on the buckling behavior of cylindrical shells. Results show that the critical buckling load of a shell without cutout decreases by increasing the PLI, whereas increasing the PLI does not have a great impact on the critical buckling load in the presence of cutout imperfection. Increasing the cutout area reduces the effect of the PLI, which results in an increase in the KDF.

Keywords

References

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