Arne Ilseng

TL;DR: In this paper, uniaxial tension tests of three different elastomer compounds commonly applied as seal materials in the oil and gas industry were performed at five different temperatures, ranging from −20 to 150°C.

TL;DR: The difference between equilibrium and transient swelling when it comes to the onset of instability in hydrogels is highlighted, which is believed to be of importance as a fundamental aspect of swelling as well as providing input to guiding principles in the design of specific hydrogel systems.

TL;DR: In this paper, the volumetric response between uniaxial tension and confined axial compression loading for commercial particle-filled hydrogenated nitrile butadiene rubber (HNBR) and fluoroelastomer (FKM) compounds was investigated.

TL;DR: A novel finite element model including a salt-specific, concentration-dependent Flory–Huggins parameter was introduced for the specific ion effects and underpins improvement of the mechanistic insight of hydrogel swelling that can be used to predict its response to environmental change.

TL;DR: In this paper, the volumetric deformation associated with uniaxial tension of particle-filled elastomeric materials at low temperatures is studied and a new constitutive model, combining the Bergstrom-Boyce visco-hyperelastic formulation with a Gurson flow potential function is outlined to account for the observed debonding effects in a numerical framework.