Browsing NTNU Open by Author "Sønstabø, Johan Kolstø"
Now showing items 1-15 of 15
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Behaviour and modelling of flow-drill screw connections
Sønstabø, Johan Kolstø (Doctoral theses at NTNU;2018:73, Doctoral thesis, 2018)This PhD thesis consists of experimental and numerical studies of the behaviour and modelling of flow-drill screw connections. It is comprised of four parts, and each part has been published, or accepted for publication, ... -
Behaviour and Modelling of Flow-Drilling Screw Connections
Amundsen, Dan Hugo; Gustad, Jo Utne (Master thesis, 2014)This thesis presents an experimental and numerical study on the behaviour of Flow-Drilling Screw (FDS) connections under various quasi-static loading conditions. The behaviour and fracture of the connections were closely ... -
Behaviour and Modelling of Self-piercing Screw and Self-piercing Rivet Connections: An Experimental and Numerical Investigation
Sønstabø, Johan Kolstø; Holmstrøm, Petter Henrik (Master thesis, 2013)Accurate and reliable models of connections are essential for the design of aluminium parts in cars. Today, there exist a few models customized for self-piercing rivets (SPR), but none for self-piercing screws (SPS). This ... -
Behaviour of Flow-Drilling Screw Connections
Sønstabø, Johan Kolstø; Holmstrøm, Petter Henrik; Morin, David; Langseth, Magnus (Journal article; Peer reviewed, 2014)An experimental study on the behaviour and fracture of flow-drilling screw connections was carried out. Cross test specimens were used to study the deformation and fracture of the connections under different loading modes. ... -
Experimental and numerical study of notched SHS made of different S355 steels
Johannessen, Håkon; Hestetræet Johannessen, Oddvar; Costas, Miguel; Clausen, Arild Holm; Sønstabø, Johan Kolstø (Peer reviewed; Journal article, 2021)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 ... -
Experimental and numerical study on the static and dynamic behaviour of notched square hollow sections made of three different types of S355
Johannessen, Håkon; Johannessen, Oddvar Hestetræet (Master thesis, 2020)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 ... -
Experimental and numerical study on the static and dynamic behaviour of notched square hollow sections made of three different types of S355
Johannessen, Håkon; Johannessen, Oddvar Hestetræet (Master thesis, 2020)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 ... -
Macroscopic modelling of Flow-Drill Screw connections
Sønstabø, Johan Kolstø; Morin, David Didier; Langseth, Magnus (Journal article; Peer reviewed, 2016)This study focuses on the modelling of Flow-Drill Screw (FDS) connections in large-scale shell analyses. Macroscopic connection models for large-scale crash simulations were assessed for modelling of FDS connections between ... -
Macroscopic modelling of flow-drill screw connections in thin-walled aluminium structures
Sønstabø, Johan Kolstø; Morin, David; Langseth, Magnus (Journal article; Peer reviewed, 2016)This paper presents an investigation on the modelling of flow-drill screw connections in thin-walled aluminium plates in large-scale finite element analyses using different macroscopic modelling techniques. Five models ... -
Macroscopic strength and failure properties of flow-drill screw connections
Sønstabø, Johan Kolstø; Holmstrøm, Petter Henrik; Morin, David; Langseth, Magnus (Journal article; Peer reviewed, 2015)Force–displacement responses and failure behaviour of connections using flow-drill screws to join aluminium sheets were investigated under various quasi-static loading conditions. This included single connector tests under ... -
Materialparametere for rustfritt stål i numeriske analyser
Faksvåg, Kristian Ullern; Jakobsen, Lars Omland (Master thesis, 2019)Austenittisk syrefast stål er attraktivt for konstruksjoner utsatt for høy belastning i korrosjonsutsatte miljø. I kjent litteratur eksisterer det ikke sanne spenning-tøyningskurver opp til brudd for AISI 316L (EN 1.4404) ... -
Modelling of Stainless Steel AISI 316L in Finite Element Simulations
Sønstabø, Johan Kolstø; Faksvåg, Kristian Ullern; Jakobsen, Lars; Clausen, Arild Holm (Peer reviewed; Journal article, 2021)This paper addresses numerical modelling of a rolled, austenitic stainless steel of grade AISI 316L, corresponding to EN 1.4404. The study comprises uniaxial tension tests at a range of temperatures (from –20°C to 200°C) ... -
On the effect of pilot holes on the mechanical behaviour of flow-drill screw joints. Experimental tests and mesoscale numerical simulations
Costas, Miguel; Morin, David; Sønstabø, Johan Kolstø; Langseth, Magnus (Peer reviewed; Journal article, 2021)This research work investigated in detail the mechanical performance of a flow-drill screw connection of two aluminium plates with and without pilot holes. An extensive experimental campaign involving material and joint ... -
Static and dynamic testing and modelling of aluminium joints with flow-drill screw connections
Sønstabø, Johan Kolstø; Morin, David; Langseth, Magnus (Journal article; Peer reviewed, 2018)A new component test suited for quasi-static and dynamic testing of flow-drill screw connections is presented. The component specimen was made of two different aluminium alloys, and included connections with two material ... -
Testing and modelling of flow-drill screw connections under quasi-static loadings
Sønstabø, Johan Kolstø; Morin, David; Langseth, Magnus (Journal article; Peer reviewed, 2018)The behaviour of a flow-drill screw connection under different quasi-static loadings was simulated using finite element models with detailed solid element meshes. The numerical models were developed with a rate-independent ...