期刊
DEFENCE SCIENCE JOURNAL
卷 59, 期 3, 页码 230-238出版社
DEFENCE SCIENTIFIC INFORMATION DOCUMENTATION CENTRE
DOI: 10.14429/dsj.59.1516
关键词
Buckling analysis; smeared stiffener model; SSM; lattice patterns; Ritz buckling analysis
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.
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