yade-users team mailing list archive

[Chiara Modenese <chiara.modenese@xxxxxxxxx>]

I didn't test it too much, it was just a try. Anyway I understood that to me the effect of friction is much more sensitive than that of damping. 
Actually, as expected, I also tryed to block the particle rotations and repeting the test I have got a completly different result in terms of stresses. Moreover doing that I got the porosity I wanted in my case (since I am doing some comparisons with other results).
Chiara







>----Messaggio originale----
>Da: bruno.chareyre@xxxxxxxxxxx
>Data: 26/01/2010 18.06
>A: <yade-users@xxxxxxxxxxxxxxxxxxx>
>Ogg: Re: [Yade-users] Damping/Porosity
>
>
>>
>> BTW, concerning the porosity I have seen that also changing the value 
>> of damping influences its value (togheter with the friction and the 
>> PSD). Is it a good idea to play also with damping?
>>
>I was expecting such influence, but I never really tested it. How big is 
>the effect compared to friction?
>>
>> I mean, for sure damping affects the simulation, but this influence 
>> could move away from a sensible solution?
>>
>Not a problem from my perspective. Isotropic compaction is not the 
>natural process of soils formation anyway. With or without damping 
>doesnt change this statement. As long as the mechanical process of 
>interest is the triaxial shear test (is it your case?), anything can 
>happen before this stage, realistic or not.
>Not that if you play with damping for the compaction, it would be a good 
>idea to revert it to a constant value for the test itself (perhaps 0.1 
>or so).
>
>Bruno
>
>
>
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