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[Fu zuoguang <question228494@xxxxxxxxxxxxxxxxxxxxx>]

New question #228494 on Yade:
https://answers.launchpad.net/yade/+question/228494

Dear Jan Stránsky :
     I am sorry for providing a unclear question, so I have give some more details zbout it:
(1). According to my simulation requirement, all the particls in specimen must have the same 
Kn and Ks which are all equal to 4e5.
(2). From these equations:
     Kn=2.*E*R1*E*R2/(E*R1+E*R2) (1)
     Ks/Kn=P (2)
I can obviously understand that all particles can not have the same values of "young" for that the radii of them are not the same. But I failed to get a correct input of "young" because the order may force me to do in this way(one type material can only be assigned only one value of "young"):

# spheremat = O.materials.append(FrictMat(poisson=0.5,density=1500,young=1.48e8,frictionAngle=0.7))

How can I do to solve this problem?
Seeking your help!

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