The influence of geometric irregularities on the linear buckling of cylindrical shells with an elliptic cutout

E. Madenci, A. Barut

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study presents a semi-analytical solution method to investigate the influence of an elliptical cutout in a composite cylindrical thin shell with non-uniform wall thickness and oval cross section on its buckling response under compression. This approach is based on the principle of minimum potential energy with local and global functions without the requirement of kinematic admissibility. The local functions capture the steep stress gradients and local deformations around the cutout. The kinematic boundary conditions on the upper and lower edges of the cylindrical shell are idealized by elastic edge restraints (supports). Specifying appropriate stiffness values for the elastic extensional and rotational springs allows the imposition of the kinematic boundary conditions. The non-uniform wall-thickness variation of the shell surface, which also leads to non-uniform material properties, is represented by perturbing the ply thicknesses by a periodical function either in the longitudinal or circumferential direction. The curvature of the non-uniform cross section is achieved by introducing an eccentricity parameter for an oval cross-section. The analysis involves two consecutive steps: (1) a pre-buckled state occurs, providing the membrane and bending stress distribution prior to buckling and (2) a buckled state caused by membrane stresses proportional to the reference (prebuckled) state. The present approach provides predictions in close agreement to those of high-fidelity finite element analysis.

Original languageEnglish (US)
Title of host publication44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
StatePublished - Dec 1 2003
Event44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2003 - Norfolk, VA, United States
Duration: Apr 7 2003Apr 10 2003

Publication series

Name44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

Other

Other44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2003
CountryUnited States
CityNorfolk, VA
Period4/7/034/10/03

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Building and Construction
  • Architecture

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    Madenci, E., & Barut, A. (2003). The influence of geometric irregularities on the linear buckling of cylindrical shells with an elliptic cutout. In 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference (44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference).