Publikasjoner og ansvarsområder
Filler metal distribution and processing stability in laser-arc hybrid welding of thick HSLA steel
Laser-arc hybrid welding of 12- and 15-mm thick structural steel
Effect of thermal residual stresses on ductile-to-brittle transition of a bi-material specimen by using the CAFE method
The effect of residual stress on fracture of materials or structures has been widely studied. However, its influence on ductile-to-brittle transition (DBT), a crucial phenomenon of structural materials, has rarely been investigated so far. In the present study, employing the eigenstrain method resid...
Additiv tilvirkning med tråd og lysbue
Numerical investigation of a novel pattern for reducing residual stress in additive manufacturing
Deposition patterns can significantly affect residual stress distribution in additive manufacturing processes. In this paper, a novel deposition pattern, the S-pattern, is proposed for the additive manufacturing process. The finite element method is used to study the temperature and stress field of ...
Eksempler på sveiseforskning ved SINTEF
Utvikling av nye tilsatsmaterialer for sveising av aluminiumslegeringer
CAFE based Multi-scale Modelling of Ductile-to-Brittle Transition of Steel with a Temperature Dependent Effective Surface Energy
It is still a challenge to numerically achieve the interactive competition between ductile damage and brittle fracture in ductile-to-brittle transition (DBT) region. In addition, since two types of fracture occur at two independent material length scales, it is difficult to process them with the sam...
Experimental measurement of temperature-dependent equivalent stress-strain curves of a 420 MPa structural steel with axisymmetric notched tensile specimens
Recently, the authors in this paper proposed a correction function to determine material’s equivalent stress-strain curve with axisymmetric-notched tensile specimens. In this study, tensile tests were performed at room temperature, -30℃ and -60℃ with axisymmetric notched tensile specimens to verify ...