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Publications
Witkowska, M. and Guedes Soares, C. (2008), “Collapse Strength of Stiffened Panels with Local Dent Damage”, Proceedings of the 27th International Conference on Offshore Mechanics and Arctic Engineering (OMAE´08), 15-20 June 2008, Estoril, Portugal, ASME, New York, Paper OMAE2008- 57950
In this study the behaviour and ultimate strength of damaged stiffened panels is investigated. The damage is in a form of local imperfection and represents a dent that could be caused by a fall or strike of an object. The model used is a panel made of five plates joined transversally with four longitudinal flat-bar stiffeners. Finite element non-linear analysis of panels having different geometrical properties is carried out. The influence of several parameters has been studied in order to establish their interaction with the presence of the local dent. It has been found that stiffened panels present quite good performance while subjected to the local damage, however, depending on geometrical characteristics, a problem of stiffener deformations may occur, significantly lowering the ultimate strength.
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