Buckling Analysis of Composite Hexagonal Lattice Cylindrical Shell using Smeared Stiffener Model

  • M. Buragohain Advanced Systems Laboratory, Hyderabad
  • R. Velmurugan Indian Institute of Technology Madras, Chennai
DOI: https://doi.org/10.14429/dsj.59.1516
Keywords: Buckling analysis, smeared stiffener model, SSM, lattice patterns, Ritz buckling analysis

Abstract

Hexagonal lattice pattern formed by helical and circumferential ribs is the most common among different possible lattice patterns. An energy-based smeared stiffener model (SSM) is developed to obtain equivalent stiffness coefficients of a composite lattice cylindrical shell with such hexagonal lattice patterns. Using the equivalent stiffness coefficients, Ritz buckling analysis was carried out. Extensive finite element modelling covering different representative sizes have been carried out. SSM is validated by comparing the estimated buckling loads. Variation of material properties of rib unidirectional composites from those of normal unidirectional composites is accounted for in the energy  formulations.
Defence Science Journal, 2009, 59(3), pp.230-238, DOI:http://dx.doi.org/10.14429/dsj.59.1516
Published
2009-05-01
How to Cite
Buragohain, M., & Velmurugan, R. (2009). Buckling Analysis of Composite Hexagonal Lattice Cylindrical Shell using Smeared Stiffener Model. Defence Science Journal, 59(3), 230-238. https://doi.org/10.14429/dsj.59.1516
Issue
Vol 59 No 3
Section
Review Papers
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