Abstract

We present a new analytical tool for educing the frequency-dependent complex shear modulus of materials from computer-aided numerical simulations of their time-dependent shear relaxation modulus, without the need of preconceived models. The rheological tool is presented in the form of an open access executable named “i-Rheo GT”, enabling its use to a broad scientific community. Its effectiveness is corroborated by analyzing the dynamics of ideal single mode Maxwell fluids and by means of a direct comparison with both bulk-rheology measurements and coarse-grained molecular dynamics simulations data transformed via a generalized Maxwell model. When adopted to transform atomistic molecular dynamics simulations data, the unbiased nature of the tool reveals new insights into the materials’ linear viscoelastic properties, especially at high frequencies, where conventional tools struggle to interpret the data and molecular dynamics simulations actually provide their most statistically accurate predictions. The w...

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