Question #402952 on Yade changed:
https://answers.launchpad.net/yade/+question/402952

    Status: Open => Answered

Jan Stránský proposed the following answer:
Hello,
the purpose of the new example was an illustration of crasching. For some
reference (also polyhdrons in Yade in general), see [4], [Elias2013] and
[Elias2014]
Polyhedra may be cunstructed either as random based on Voronoi tessalation
or you can directly prescribe positions of vertices (see utils.polyhedron
function [1,2]). So the CAD/STL import is possible, you have to make a step
between (extract vertices from the file and pass them to the polyhedron)
For the meaning of polyhedra_utils.polyhedra see [3].

I wonder whether  rugby like shape packed by sub-particles can be used as a
> new particle to perform another simulation in YADE??


Here I don't know at all what you mean :-) please try to formulate the
question such that imagining yourself knowing nothing about the problem you
could understand the meaning..
- you can have one polyhedron, which may crush during simulation (and its
pieces can crush again and so on) like illustrated with the new example
- for some other approaches see (and try to answer) Christian's comment or
see [5]


cheers
Jan

[1] https://github.com/yade/trunk/blob/master/examples/polyhedra/clump.py
[2] https://yade-dem.org/doc/yade.utils.html#yade.utils.polyhedron
[3] https://yade-dem.org/doc/yade.polyhedra_utils.html#
yade.polyhedra_utils.polyhedra
[4] https://www.yade-dem.org/doc/publications.html
[5] https://answers.launchpad.net/yade/+question/293955


2016-10-17 16:47 GMT+02:00 Huihuang Xia <
question402...@answers.launchpad.net>:

> Question #402952 on Yade changed:
> https://answers.launchpad.net/yade/+question/402952
>
>     Status: Answered => Open
>
> Huihuang Xia is still having a problem:
> Dear Jan,
>
> Thanks for you patience and kindness, I plan to fill a gts surface like a
> rugby using many sub-particles in YADE. I have saw your examples in github,
> but the polyhedron was created by some parameters rather than importing  a
> gts or stl surface from a CAD package.
> I wonder whether  rugby like shape packed by sub-particles can be used as
> a new particle to perform another simulation in YADE??
> Many thanks and regards.
>
> Huihuang Xia
>
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