Modelling the effects of geometric imperfections on the buckling and initial post-buckling behaviour of flat plates under compression using measured data

Featherston, Carol Ann ORCID: https://orcid.org/0000-0001-7548-2882, Eaton, Mark Jonathan ORCID: https://orcid.org/0000-0002-7388-6522 and Holford, Karen Margaret ORCID: https://orcid.org/0000-0002-3239-4660 2012. Modelling the effects of geometric imperfections on the buckling and initial post-buckling behaviour of flat plates under compression using measured data. Strain 48 (3) , pp. 208-215. 10.1111/j.1475-1305.2011.00813.x

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Abstract

Recent developments in optical techniques have allowed accurate representations of the geometry of test specimens to be obtained. These enable the nature of geometric imperfections resulting from manufacture or set-up to be captured in a form which allows them to be incorporated directly into models generated to predict the behaviour of the structure. This study examines the effect of such imperfections on the behaviour of a series of panels, simply supported along all four edges, and subject to uniaxial compressive in-plane loading. In each case, digital image correlation is used to determine the initial profile and set-up of the panel and to monitor its behaviour during test. The data are used to automatically generate a series of meshes representative of each of the specimens tested, suitable for finite element analysis. Comparison of the results obtained from these analyses with those found during the experiments modelled shows an improved correlation when compared with standard techniques for assessing imperfection sensitivity. Set-up is straightforward, and models can be obtained quickly based on the data collected.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TJ Mechanical engineering and machinery
Uncontrolled Keywords:	buckling; digital image correlation; finite element analysis; imperfection sensitivity; optical techniques; post-buckling
Publisher:	Wiley-Blackwell
ISSN:	0039-2103
Last Modified:	19 Oct 2022 08:36
URI:	https://orca.cardiff.ac.uk/id/eprint/18403

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