Naslov
Modelling mechanical behavior of steel in marine environment

Autori
Vukelić, Goran ; Vizentin, Goran ; Pastorčić, Darko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Skup
8th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2022)

Mjesto i datum
Oslo, Norveška, 05.06.2022. - 09.06.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
marine environment effect ; pitting corrosion ; marine structures ; mechanical properties ; material degradation

Sažetak
Marine environment adversely affects the durability of welded steel structures. Generally, it causes corrosion, formation of surface defects that can grow into cracks and cause fracture. In order to study this process, idea of this research was to develop a credible numerical model of welded steel specimen exposed to marine environment and to use this model to perform numerical simulation of mechanical tests. In order to do so, experimental research has been performed first with the aim of assessment of sea environment effect on mechanical properties of steel and surface morphology of the specimen. Standardized specimens have been cut out of welded sheets made of high-strength shipbuilding steel and exposed for prolonged period (6, 12, 24 and 36 months) to real sea environment (sea, sea waves, fresh water). After extracted from experiment site, specimens have been tested to determine the change of mechanical properties of metal. Standardized tensile tests have been performed along with Charpy impact tests and hardness measurements. Additionally, size of corrosion pits on the surface of the specimens has been measured and corroded surface 3D scanned. Results show deterioration of mechanical properties of steel exposed to sea environment when compared with steel kept at room conditions. The most significant deterioration is noticed on specimens exposed to continuous influence of sea waves [1]. Second stage of this research includes building a finite element models of specimens that would have surface morphology modelled according to real situation. Mechanical tests would be simulated numerically and validated according to ones performed experimentally. If completed accurately, this model could be used for further assessment of other types of steel exposed to sea environment.

Izvorni jezik
Engleski

Znanstvena područja
Temeljne tehničke znanosti

POVEZANOST RADA