Towards a universal shear correction factor in filament stretching rheometry

Abstract Filament stretching rheometry is a prominent experimental method to determine rheological properties in extensional flow whereby the separating plates extension rate. In literature, several correction factors that can compensate for errors introduced by shear contribution near have been and validated linear viscoelastic regime. this work, systematic analysis conducted if material-independent factor be found non-linear polymers. To end, finite element model presented describe resulting stresses filament rheometer. The incorporates viscoelasticity radius-based controller plate speed added mimic typical rheometry. comparing force simulations with analytical solutions. effects of end-plates on measurements are investigated, modification proposed This shows good agreement performed at multiple initial aspect ratios strain rates shown valid range polymers behaviour.