Parametric study on the collapse strength of rectangular plates with localized imperfections under in-plane compression

Issue title: Strength and Crashworthiness of Ship Structures

Article type: Research Article

Authors: Guedes Soares, C.^; | Luís, R.M. | Teixeira, A.P. | Quesnel, T. | Nikolov, P.I. | Steen, E. | Khan, I.A. | Toderan, C. | Olaru, V.D. | Bollero, A. | Taczala, M.

Affiliations: Centre for Marine Technology and Engineering, Technical University of Lisbon, Instituto Superior Técnico, Lisbon, Portugal | Principia Marine, France | Technical University of Varna, Varna, Bulgaria | Det Norske Veritas, Norway | Universities of Glasgow and Strathclyde, Glasgow, UK | University of Liége, Liége, Belgium | University “Dunarea de Jos” of Galati, Galati, Romania | Centro Tecnico Navale, Italy | Technical University of Szczecin, Szczecin, Poland

Note: [] Corresponding author. E-mail: guedess@mar.ist.utl.pt.

Abstract: The effects of localized imperfections on the collapse strength of plates are studied by means of finite element analysis performed by different authors. First a benchmark study is performed to assess the accuracy of the results obtained using different codes on the same case study. Afterwards, a parametric study on the effect of the localized imperfections on the collapse strength is performed. Finally, the effect of combining local and global imperfections was studied. It is found that the addition of a localized imperfection changes the collapse strength of the plate, which depends on the amplitude and size of the localized imperfection change.

Keywords: Initial imperfections, localized imperfections, plate, buckling, collapse strength

DOI: 10.3233/ISP-2008-0039

Journal: International Shipbuilding Progress, vol. 55, no. 1-2, pp. 63-85, 2008