Hi All,
I want to know the Relative Density (Dr =((emax-e)/(emax-emin) ) issue in
DEM.From my study,there are different proposal on Dr .One of the best suited
proposal of them as follows:
Reference:
>> Salot et al."DEM modeling of frictional materials: Definition of the
>> Relative density and application to granular soil mixtures"Annual Report
>> 2006,Discrete Element Group for Hazard Mitigation,P.A1-A7.
>>Chareyre B. & Villard P., 2003, Discrete element modeling of curved
>>geosynthetic anchorages with known macro-properties, Numerical Modeling in
>>Micromechanics via Particle Methods, Proc. of the First International PFC
>>Symposium, Gelsenkirchen, Germany,6/7 November 2002, Konietzky (ed), p.
>>197-203
My Question:
>>By radius expansion method particle radius increased until to desire mean
>>pressure ...where Minimum density state obtained.
>>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.
Any co-operation will be highly appreciable.
Thanks in advance.
Regards,
Mohammad Nurul Islam
............................................
Mohammad Nurul Islam
Soil Mechanics Lab
Room No-401
Department of Civil and Environmental Engineering
Saitama University
Japan.
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