Degradation of the compressive strength of unstiffened/stiffened steel plates due to both-sides randomly distributed corrosion wastage

Abstract

Degradation of the compressive strength of unstiffened/stiffened steel plates due to both-sides randomly distributed corrosion wastage Abstract The paper addresses the problem of the influence of randomly distributed corrosion wastage on the collapse strength and behaviour of unstiffened/stiffened steel plates in longitudinal compression. A series of elastic-plastic large deflection finite element analyses is performed on both-sides randomly corroded steel plates and stiffened plates. The effects of general corrosion are introduced into the finite element models using a novel random thickness surface model. Buckling strength, post-buckling behaviour, ultimate strength and post-ultimate behaviour of the models are investigated as results of both-sides random corrosion.

Stress concentration around perforations produced by corrosion in steel storage tanks

“…In the context of stability of ship hull plates and stiffened panels, the influence of pitting corrosion has been addressed by Guedes Soares and coworkers (see, for example, Jiang and GuedesSoares 2012, Silva et al 2013). Along this line, Mahammad et al (2010) investigated plates with corrosion on both surfaces, for stiffened as well as unstiffened plates. Mahammad et al (2012) considered plate buckling and post-buckling behavior and proposed a simplified effective thickness methodology to account for pit corrosion affecting one side of a plate.…”