Ultimate strength of corroded web-core sandwich beams

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Journal Title
Journal ISSN
Volume Title
School of Engineering | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2013
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-14
Series
Marine Structures, Volume 31
Abstract
The corrosive marine environment is a threat to the ultimate strength of steel sandwich structures. Therefore, ultimate strength experiments were carried out in three-point bending for beams with different corrosion exposure times, i.e. one and two years. Standard laser-welded web-core sandwich beams are studied and different corrosion protection systems considered. The beams experienced general corrosion. The thickness reduction in unprotected plates and laser welds is around the typical 0.1 mm/year. This led to an ultimate strength reduction of 10% and 17% for beams with exposure times of one and two years, respectively. The experimental ultimate strength is in agreement with finite element simulations. The ultimate strength was maintained for the beams protected with coating or closed-cell polyurethane (PU) foam.
Description
Keywords
Web-core sandwich, ultimate strength, corrosion, three-point bending, stress-strain
Other note
Citation
Jelovica, Jasmin & Romanoff, Jani & Ehlers, Sören & Aromaa, Jari. 2013. Ultimate strength of corroded web-core sandwich beams. Marine Structures. Volume 31. 1-14. DOI: 10.1016/j.marstruc.2012.12.001.