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[Bruno Chareyre <question271394@xxxxxxxxxxxxxxxxxxxxx>]

Question #271394 on Yade changed:
https://answers.launchpad.net/yade/+question/271394

Bruno Chareyre posted a new comment:
1) Not sure what Euler's theorem is. What I can tell is the equations
are exact, just like having rotation matrices R1 and R2, then defining
the rotation 1->2 as inv(R1)*R2. Don't worry about quaternions, they are
just computationaly efficient, they don't change the maths.

2) yes

Not sure which question you refer to in 271097, overall I would say the
model we are speaking about is close to Potyondy & Cundall for the main
equations, it only differs in the logic of how friction and cohesion are
combined.

Bruno

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