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[Jan Stránský <question290372@xxxxxxxxxxxxxxxxxxxxx>]

Question #290372 on Yade changed:
https://answers.launchpad.net/yade/+question/290372

    Status: Open => Answered

Jan Stránský proposed the following answer:
>
>
> But according to your opinion is it logic to compute an average for E!!
> specially when there is a great deference between tow young modulus? for
> example in my practice, the interaction young modulus is very close to 'E'
> of mat1 and very far from 'E' of mat2.
> Is there any other suggestion or experience of computation of 'E' of
> interaction?
> 'average' may be a good approach for computation of 'friction angle' of
> interaction; but may be bad for 'E'
>

well, it is not my opinion, it is actual implementation :-) Of course you
are free to implement your own formula, or change material parameters of
the interaction as you want:

#######################################
for i in O.interactions:
  mat1 = O.bodies[i.id1].mat
  mat2 = O.bodies[i.id2].mat
  E1,E2 = mat1.young, mat2.young
  i.phys.E = whatever(E1,E2)
  i.phys.kn = pi*pow(i.crossSection,2)*i.phys.E / i.phys.refLength
  # similarly for other parameters
#######################################

cheers
Jan

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