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Towards a theory of inelastic stability

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If you have a question about this talk, please contact Dr Maria Marques de Carvalho.

The theory of elastic stability has been a great triumph in structural engineering and underpins the practical design methodologies of a wide range of structural elements and systems. Several important metals, however, such as aluminium and stainless steel alloys, only exhibit a very limited linear elastic range, display gradual yielding and extensive strain hardening, and cannot be designed using the design methodologies applicable to carbon steel. A suitable theory of inelastic stability, on the other hand, is still in its infancy, held back by an almost century-old theoretical hurdle dubbed the ‘plastic buckling paradox’. We will investigate the nature and origins of this paradox, and propose a solution based on a consistent application of plastic flow theory. Some new developments originating from this break-through, related to buckling of inelastic plates and columns, will be presented.

This talk is part of the Engineering Department Structures Research Seminars series.

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