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[Bruno Chareyre <question647570@xxxxxxxxxxxxxxxxxxxxx>]

Question #647570 on Yade changed:
https://answers.launchpad.net/yade/+question/647570

    Status: Open => Answered

Bruno Chareyre proposed the following answer:
Hi,  could specify what kind of visco-elasticity you are looking for (not an expert of asphalt myself)?
Yade has (at least):
- a parallel spring-dashpot model for the normal force (usual Walton-Braun type of, a.k.a Kelvin-Voigt [1])
- the previous one with an additional instantaneous spring (Standard Linear Solid [1]), applied to both normal and shear forces (and combined with friction for the shear force)
- the previous one with a non-linear dashpot as defined by the lubrication approximation [2], again for normal and shear directions
An ample choice... and my guess is that all of them will produce macroscopic visco-elasto-plasticity of some kind. 
Bruno

[1] https://en.wikipedia.org/wiki/Viscoelasticity
[2] http://link.springer.com/article/10.1007/s10035-015-0560-6

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