dc.contributor.advisor | Clausen, Arild Holm | |
dc.contributor.advisor | Costas, Miguel | |
dc.contributor.advisor | Sønstabø, Johan Kolstø | |
dc.contributor.author | Johannessen, Håkon | |
dc.contributor.author | Johannessen, Oddvar Hestetræet | |
dc.date.accessioned | 2021-09-21T16:13:02Z | |
dc.date.available | 2021-09-21T16:13:02Z | |
dc.date.issued | 2020 | |
dc.identifier | no.ntnu:inspera:56511028:26336588 | |
dc.identifier.uri | https://hdl.handle.net/11250/2780024 | |
dc.description | Full text not available | |
dc.description.abstract | Denne studien sammenligner den mekaniske oppførselen til kvadratiske hulprofiler, produsert av tre ulike S355-kvaliteter: kaldformet, varmvalset og offshore stål. Basert på kvasistatiske enaksielle strekktester, ble en materialmodell og et bruddkriterium for hver stålkvalitet kalibrert. Bruddkriteriet anvendte en nylig foreslått regulariseringsmodell (eng: through-thickness damage regularisation scheme), med formål om å beskrive kapasiteten til hulprofilene ved bruk av skallelementer. Både kvasistatiske og dynamiske trepunkts bøyetester ble gjennomført. Kjerver ble brukt til å fremprovosere brudd i testene. Det kaldformede stålet hadde høyest flytespenning av de tre stålkvalitetene, og offshore-stålet hadde bedre duktilitet enn de andre to. Resultatene til de numeriske simuleringene viste at regulariseringsmodellen klarte å simulere materialoppførselen og brudd. | |
dc.description.abstract | This study compares the mechanical behaviour of square hollow sections (SHS) made of three different types of S355: cold-formed, hot-rolled and offshore steel. A material model and failure criterion for each steel type were calibrated based on quasi-static uniaxial tensile tests. The failure criterion applies a recently proposed through-thickness damage regularisation model with the purpose of accurately describing the load-bearing capacity using shell elements. Experimental three-point bending tests were conducted at both quasi-static and dynamic conditions. Notches were used to trigger failure in the tests. The cold-formed steel exhibited the highest yield stress of the three, while the offshore steel displayed better ductility than the two other steel types. The numerical simulations showed that a shell element model of the SHS incorporating the regularisation scheme was able to describe the material behaviour and predict failure. | |
dc.language | | |
dc.publisher | NTNU | |
dc.title | Experimental and numerical study on the static and dynamic behaviour of notched square hollow sections made of three different types of S355 | |
dc.type | Master thesis | |