The behaviour of materials under combined steady and oscillatory shear

Abstract

The authors consider the behaviour of elastico-viscous liquids as they deform under the action of an unsteady shear field consisting of a small-amplitude oscillatory shear superimposed on a steady simple shear. The theory for such a situation is developed in detail and certain predictions, some quantitative, and some qualitative, are made. These predictions are shown to be in good agreement with experimental results obtained from a Weissenberg rheogoniometer for certain aqueous polymer solutions.