Abstract
We revisit the relation between the shear-stress relaxation modulus , computed at finite shear strain , and the shear-stress autocorrelation functions and computed, respectively, at imposed strain and mean stress . Focusing on permanent isotropic spring networks it is shown theoretically and computationally that in general for with being the static equilibrium shear modulus. and thus must become different for solids and it is impossible to obtain alone from as often assumed. We comment briefly on self-assembled transient networks where must vanish for a finite scission-recombination frequency . We argue that should reveal an intermediate plateau set by the shear modulus of the quenched network.
- Received 16 May 2014
- Revised 9 December 2014
DOI:https://doi.org/10.1103/PhysRevE.91.022107
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