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Publications
Gordo, J.M. and Guedes Soares, C. (2015), “Degradation of long plate’s ultimate strength due to variation on the shape of initial imperfections”, Guedes Soares, C. Dejhalla R. and Pavletiæ D., (Eds.), Towards Green Marine Technology and Transport, Taylor & Francis Group, London, UK, pp. 345-354
The initial imperfections can degrade the strength of structural elements such as plate elements and reinforced plates especially when subjected to compressive loads in the plan. The amplitude of the imperfections is usually considered one of the most important parameter in the quantification of this degradation of the plate’s strength. In this study, performed with the finite element method it is shown that the form of the initial imperfections assumed greater importance than its maximum amplitude. Groups are defined with different levels of strength as a function of the shape of initial imperfections and it is quantified the degradation of the longitudinal axial compressive strength due to the increase of the magnitude of initial defects in each of these groups of plate elements both for stocky and very slender. From this study it is concluded that the minimum strength in simply supported plates with restrained edges is obtained when the mode of initial imperfections is greater than the critical mode.
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