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[Chareyre <question158839@xxxxxxxxxxxxxxxxxxxxx>]

Question #158839 on Yade changed:
https://answers.launchpad.net/yade/+question/158839

Chareyre proposed the following answer:
It's a bit like for globalStiffness time-stepper.
The algorithm uses stiffness of contacts, so it matters if the law is
linear or not.
For HM, the engine should work correctly if it can get relevant tangent
(i.e. dFn/dUn for current Fn) stiffnesses of each boundary-particle
contacts.
Is that possible with current implementation of HM? What is the meaning
of i->phys->kn?
If it is a bit unstable, playing with servo-damping could help
(https://yade-dem.org/doc/yade.wrapper.html?highlight=triaxial#yade.wrapper.TriaxialStressController.wallDamping).

Bruno

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