yade-users team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

Shahed Rana a écrit :
> Hi All,
> I have some question on Triaxial Test.
> >In my earlier mail I wanted to know about different particle size...
> For the different particle size: have a look at TriaxialTest, it generates spheres at random of diameter .5 and 1.5 IIRC. Václav can any body explain little more .5 and 1.5 IIRC?  >From Triaxial Test.cpp---mean radius,minrad,and max rad explored,with the co-operation of Jerome. min_rad=(1-0.3)*mean_rad
So, it generates spheres between 0.7 and 1.3 (not 0.5, 1.5).
> max_rad=(1+0.3)*mean_rad

and the initial mean size of particles (can change later with internal 
compaction) is :
> mean_rad=((xyz(1-porosity)/(pi*n*(4/3))^(1/3)
>
> But.. 00087 string GenerateCloud(vector<BasicSphere>& sphere_list, Vector3r lowerCorner, Vector3r upperCorner, long number, Real rad_std_dev, Real porosity) 00272 message <http://yade.berlios.de/doxygen/html/dc/dba/classFileGenerator.html#9f2e268de52c62d9bbdc7c8b0eaa48e9>=GenerateCloud(sphere_list, lowerCorner <http://yade.berlios.de/doxygen/html/da/d15/classTriaxialTest.html#96f70126f235ee9a33a2ff264c9c8e84>, upperCorner <http://yade.berlios.de/doxygen/html/da/d15/classTriaxialTest.html#792aed3852b6b1136583f644009d1481>, numberOfGrains <http://yade.berlios.de/doxygen/html/da/d15/classTriaxialTest.html#c91bc9c756934fc8060788a6a1cdd360>, 0.3, 0.75);  It means rad_std_dev=0.3,My question why 0.3 and how this value computed?  >Last.from the File generator window>Triaxial Test Parameter> 
0.3 is not computed, its just 0.3. If you prefer 0.5 you can modify 
this. What should be done in fact is to add a registered parameter that 
could be changed by users.


>  1.what is the significance of damping force and damping moment?of course in dem they have significance effect. But from which part of YADE, I can make look to know about these..like to chose the value..default given 0.2. 
Just to be sure : you know that you can use ctags from inside kdevelop 
to find where a variable is defined? Look into classes with damping in 
their names, damping is used in them.

>  2.sigma_iso = 50000..is it isotropic pressure?
Yes, it is the pressure that TriaxialStressController will try to 
maintain on each "activated" boundary.
So... it is not always isotropic as less than 6 boudaries may be 
activated at the same time.

> .
> .
> Is there any more reference to which I can look?
>
For questions like this, unfortunately not.
You can ask here when you have precise questions on the meaning of some 
parameters.
However, if you feel like commenting the code here and there in the 
meantime, you can always send me commented files and I'll commit them on 
the SVN server.

Bruno



> Regards, Rana
>
> ------------------------------------------------------------------------
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try 
> it now. 
> <http://us.rd.yahoo.com/evt=51733/*http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ%20> 
>
>
> ------------------------------------------------------------------------
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try 
> it now. 
> <http://us.rd.yahoo.com/evt=51733/*http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ%20> 
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Yade-users mailing list
> Yade-users@xxxxxxxxxxxxxxxx
> https://lists.berlios.de/mailman/listinfo/yade-users
>   


-- 
 
_______________
Chareyre Bruno
Maitre de conference

Institut National Polytechnique de Grenoble
Laboratoire 3S (Soils Solids Structures) - bureau E145
BP 53 - 38041, Grenoble cedex 9 - France
Tél : 33 4 56 52 86 21
Fax : 33 4 76 82 70 43
________________

_______________________________________________
Yade-users mailing list
Yade-users@xxxxxxxxxxxxxxxx
https://lists.berlios.de/mailman/listinfo/yade-users