Blar i NTNU Open på forfatter "Hugaas, Eivind"
-
Buckling due to external pressure of a composite tube measured by Rayleigh optical backscatter reflectometry and analyzed by finite elements
Hugaas, Eivind; Vedvik, Nils Petter; Echtermeyer, Andreas (Journal article; Peer reviewed, 2018)There is a growing interest in replacing steel tubes that operate in high pressure and high temperature environments with composite tubes. Such applications can include drilling risers and drill strings for the offshore ... -
Estimating SN curves for local fiber dominated fatigue failure in ring specimens representing filament wound pressure vessels with damage
Hugaas, Eivind; Echtermeyer, Andreas (Peer reviewed; Journal article, 2021)Modeling the effect of fatigue is important for predicting remaining life of damaged filament wound composite pressure vessels. This study shows how S-N curves can be measured that describe local fiber dominated fatigue ... -
Filament wound composite fatigue mechanisms investigated with full field DIC strain monitoring
Hugaas, Eivind; Echtermeyer, Andreas (Peer reviewed; Journal article, 2021)Fatigue of filament wound materials was investigated using Digital Image Correlation DIC monitoring every 50th cycle of a high cycle fatigue test of a split disk ring sample. The ring was cut from a filament wound glass ... -
Long term material properties of pressure vessels made of composite material
Hugaas, Eivind (Doctoral theses at NTNU;2022:56, Doctoral thesis, 2022)Pressure vessels are currently the limiting factor in the hydrogen distribution chain. The pressure vessels are preferably made out of composite materials to achieve practical weight to strength ratios and avoid hydrogen ... -
Optimize Resistance to buckling under external hydrostatic Pressure of thin walled Composite Tubes
Hugaas, Eivind (Master thesis, 2014)Composite tubes are a very good alternative to steel tubes in applications requiring low weight and high stiffness. For composite tubes to replace traditional steel tubes in demanding environments, such as in the subsea ... -
Progressive fatigue failure analysis of a filament wound ring specimen with a hole
Hugaas, Eivind; Vedvik, Nils Petter; Echtermeyer, Andreas (Journal article; Peer reviewed, 2021)A progressive FEA mechanical fatigue degradation model for composites was developed and implemented using a UMAT user material subroutine in Abaqus. Numerical results were compared to experimental strain field data from ...