Time dependent nonlinear shear stress effects in simple liquids: A molecular dynamics study

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Abstract
The effects of large amplitude shearing rates on 108 particle amorphous Lennard‐Jones systems have been examined. A resolution of the structural and dynamical properties reveals that there is a tendency for shear to reorganize the liquid into layers to facilitate flow and hence reduce shear viscosity. The first steps have been made to determine those physical phenomena that are necessary to develop a theory of time dependent nonlinear shear viscoelastic effects. The form of the distortion giving rise to nonlinear shear stresses is well understood although its magnitude is intimately linked with parallel structural changes in an, at present, intractable way.