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Re: [Question #664343]: Lack of recoil in sphere-pfacet impact?

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Bruno Chareyre <question664343@xxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 20 Feb 2018 16:17:54 -0000
Reply-to: question664343@xxxxxxxxxxxxxxxxxxxxx
Sender: bounces@xxxxxxxxxxxxx

Question #664343 on Yade changed:
https://answers.launchpad.net/yade/+question/664343

    Status: Open => Answered

Bruno Chareyre proposed the following answer:
Hi,
In the above example one facet is created with fixed=False, the other with fixed=True.
Consistently one is accelerated by gravity and the other is not.

What is maybe not clear for you is that only the nodes are really
inertial. The so-called connections are not moving independently of the
nodes, nor are the facets, so they are always non-dynamic objetcs.

Consistently (the first facet, the moving one, is composed of the first
seven elements):

ade [6]: for b in O.bodies:
    print b.shape.__class__, b.state.blockedDOFs
     ...:     
<class 'yade.wrapper.GridNode'> 
<class 'yade.wrapper.GridNode'> 
<class 'yade.wrapper.GridNode'> 
<class 'yade.wrapper.GridConnection'> xyzXYZ
<class 'yade.wrapper.GridConnection'> xyzXYZ
<class 'yade.wrapper.GridConnection'> xyzXYZ
<class 'yade.wrapper.PFacet'> xyzXYZ
<class 'yade.wrapper.GridNode'> xyzXYZ
<class 'yade.wrapper.GridNode'> xyzXYZ
<class 'yade.wrapper.GridNode'> xyzXYZ
<class 'yade.wrapper.GridConnection'> xyzXYZ
<class 'yade.wrapper.GridConnection'> xyzXYZ
<class 'yade.wrapper.GridConnection'> xyzXYZ
<class 'yade.wrapper.PFacet'> xyzXYZ

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