Experiments on interactive buckling in optimized stiffened panels

R Butler, M Lillico, G W Hunt, N J McDonald

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Five aluminium. blade stiffened panels of three different geometries were tested in compression in a displacement controlled loading apparatus. Panel designs were achieved using VICONOPT, a fast-running optimization package based on linear eigenvalue buckling theory, and embrace two different design philosophies. The panels were loaded beyond initial buckling to collapse, and the effects of initial overall imperfections were monitored. In all cases the final failure showed evidence of significant interaction between buckling modes. The tests draw particular attention to a violently unstable and unpredictable form of failure, involving a combination of overall and stiffener buckling, which can occur even when initial buckling in the skin has the effect of pushing the panel in the opposite sense.
Original languageEnglish
Pages (from-to)40-48
Number of pages9
JournalStructural and Multidisciplinary Optimization
Volume23
Issue number1
Publication statusPublished - 2001

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