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[Jérôme Duriez <question688544@xxxxxxxxxxxxxxxxxxxxx>]

Question #688544 on Yade changed:
https://answers.launchpad.net/yade/+question/688544

    Status: Open => Answered

Jérôme Duriez proposed the following answer:
Hi,

I think we can say that:

1- Plasticity in shear is considered as non-associated (with zero local
dilatancy). Looking into the code source may help, as always

2- There is no criterion in itself (from an algorithm point of view, if
that was your question). It's the particles themselves, and how they
collectively organize in a contact network, which give rise to softening
for a dense packing. Scientific literature will be more helpful than our
technical forum, here.

[*] https://gitlab.com/yade-
dev/trunk/-/blob/master/pkg/dem/ElasticContactLaw.cpp#L78

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