Shear induced normal stress differences in aqueous foams

Abstract

A finite simple shear deformation of an elastic solid induces unequal normal stresses. This nonlinear phenomenon, known as the Poynting effect, is governed by a universal relation between shear strain and first normal stresses difference, valid for non-dissipative elastic materials. We provide the first experimental evidence that an analog of the Poynting effect exists in aqueous foams where besides the elastic stress, there are significant viscous or plastic stresses. These results are interpreted in the framework of a constitutive model, derived from a physical description of foam rheology.

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Cited by in corpus (3)

• On the existence of a simple yield stress fluid behavior
• Discrete rearranging disordered patterns: Prediction of elastic and plastic behaviour, and application to two-dimensional foams
• Emergence of transient reverse fingers during radial displacement of a shear-thickening fluid