>
> My Question:
> >>By radius expansion method particle radius increased until to desire
> mean pressure ...where Minimum density state obtained.
>
I'm sorry, I don't understand this question.
> >>What about the REFD(Radius Expansion Friction Decrease) that was
> implemented for Maximum density?In REFD friction reaches to zero
> maintaining the desired mean pressure.When particle generated with
> high porosity and when REFD implemented---what are the difference?For
> more specific I want to know REFD and its Implementation.
>
>
REFD :
contact_friction = friction_initial;
while (porosity > porosity0)
{
contact_friction *= 0.99999; //or anything lower but close to 1
keep stress constant;
run a few cycles;
}
contact_friction = friction_final;// recommended at that point :
contact_friction < friction_final, or the sample will be unstable.
This method can give you many different density values, depending on
friction_initial and porosity0.
Bruno
--
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Chareyre Bruno
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Grenoble INP
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BP 53 - 38041, Grenoble cedex 9 - France
Tél : 33 4 56 52 86 21
Fax : 33 4 76 82 70 43
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