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[Vasileios Angelidakis <question705007@xxxxxxxxxxxxxxxxxxxxx>]

Question #705007 on Yade changed:
https://answers.launchpad.net/yade/+question/705007

Vasileios Angelidakis proposed the following answer:
Hi Guo,

What you describe is one of the limitations of the multisphere modelling
approach. Indeed, this technique introduces an artificial amount of
contact stiffness anisotropy at the particle level.

Thankfully, the linear model of yade considers the stiffness to be
proportional to particle radius, and so smaller subspheres within your
clump should have smaller effect in terms of additional force. If this
issue is critical in your application, you can either 1. look into
different clump generation techniques, where you can control the amount
of overlap introduced or 2. change to a different modelling technique
for non-spherical particles.

Hope this helps,
Vasileios

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