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[Chen Lifan <question692713@xxxxxxxxxxxxxxxxxxxxx>]

New question #692713 on Yade:
https://answers.launchpad.net/yade/+question/692713

Hello:
I'm using CohFrictMat to define the material of the rock issue. And I have some questions in the coefficients of alphaKr and alphaKtw. In the tutorial guide, it says alphaKr and alphaKtw are dimensionless rolling(bending) stiffness and twisting stiffness, respectively. I wonder what does than mean and I have no idea how much the values are proper for granite as there seems no reference. 
I will appreciate any kind of help.
Thanks!

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