Phenomena in the bifurcation of unsymmetric composite plates

KD Potter, PM Weaver, A Abu Seman, S Shah

Research output: Contribution to journalArticle (Academic Journal)peer-review

83 Citations (Scopus)

Abstract

The phenomena observed in the large scale bifurcation of unsymmetric composite plates are characterized. Such plates can exhibit more than one stable geometry and can be ‘snapped’ from one geometry to another. It is convenient to think of this process as providing sufficient strain energy to overcome an energy maximum and is analogous to an activation energy. To describe the snap-through process, 2-ply, [0, 90] unsymmetric plates were forced from one state to the other in rigid test rigs such that great control could be achieved over the process and loads and deformations were monitored throughout the bifurcation. A hitherto unrecognised phenomenon was noted in that the snap-through process was seen to take place not as a single bifurcation but as two closely coupled bifurcations, as first one side snaps through and then the other. The experimental approach taken here, coupled with the simple energy analysis, should be of value in understanding practical structures of multiple stable states, such as might be used in morphing or adaptive aircraft.
Translated title of the contributionPhenomena in the bifurcation of unsymmetric composite plates
Original languageEnglish
Pages (from-to)100 - 106
Number of pages7
JournalComposites Part A: Applied Science and Manufacturing
Volume38(1)
DOIs
Publication statusPublished - Jan 2006

Bibliographical note

Publisher: Elsevier

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