[Yade-users] [Question #683775]: modelling "solid bridges" between particles

2019-09-09 Thread Rioual
New question #683775 on Yade:
https://answers.launchpad.net/yade/+question/683775

Hello,

I would like to model solid bridges between particles of a packing as beams 
linking the particles together.
The beam model would be defined by a young modulus, a shear modulus, cross 
section and length.
The solid bridges at particle scale could brake when a certain stress exceeds 
the tensile strength of the material.
Is it possible to model this kind of solid bridge between particles with Yade ??
Couln't find any informations about that.

Thank you very much for informations,

Best wishes,

Fr.

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Re: [Yade-users] [Question #683775]: modelling "solid bridges" between particles

2019-09-09 Thread A Dinesh
Question #683775 on Yade changed:
https://answers.launchpad.net/yade/+question/683775

Status: Open => Answered

A Dinesh proposed the following answer:
Hi Rioual,

Yes you can model such kind of physics in Yade. To model such phenomena, we 
have to create bonds between particles,
which follow certain physics. These bonds are created to act like a cohesion 
force between the particles of the solid bridge.
And these bond will have a tension and shear stresses.

There are examples in yade which model this. See for example [1]. To understand 
the physics behind it, please look at [2],
which describes the physics as well as the implementation of the model in yade.


[1] 
https://gitlab.com/yade-dev/trunk/blob/master/examples/cylinders/bendingbeams.py
[2] 
https://dspace.cvut.cz/bitstream/handle/10467/79056/F1-D-2018-Smilauer-Vaclav-thesis.pdf?sequence=-1&isAllowed=y

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Re: [Yade-users] [Question #683775]: modelling "solid bridges" between particles

2019-09-09 Thread Jan Stránský
Question #683775 on Yade changed:
https://answers.launchpad.net/yade/+question/683775

Jan Stránský proposed the following answer:
Hi,
also see [1,2]
cheers
Jan

[1] https://gitlab.com/yade-dev/trunk/tree/master/examples/concrete
[2] https://gitlab.com/yade-dev/trunk/blob/master/examples/concrete/uniax.py

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Re: [Yade-users] [Question #683775]: modelling "solid bridges" between particles

2019-09-10 Thread Rioual
Question #683775 on Yade changed:
https://answers.launchpad.net/yade/+question/683775

Status: Answered => Open

Rioual is still having a problem:
Hello Dinesh, Jan,

Thanks, but it is not clear to me how i can define a connection between the end 
of a cylinder and a sphere 
representing a particle? 

regards,

FR.

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Re: [Yade-users] [Question #683775]: modelling "solid bridges" between particles

2019-09-10 Thread Jan Stránský
Question #683775 on Yade changed:
https://answers.launchpad.net/yade/+question/683775

Status: Open => Needs information

Jan Stránský requested more information:
In the described approach, the "cylinder" is the interaction, the
connection between spheres (as being interaction, it does not create
interactions with other "cylinders" or spheres)

It is also possible to use physical cylinders able of further
interactions, but I do not have personal experience with them.

So please be more specific on haw you define "solid bridges between
particles" :-)

cheers
Jan

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Re: [Yade-users] [Question #683775]: modelling "solid bridges" between particles

2019-09-10 Thread Rioual
Question #683775 on Yade changed:
https://answers.launchpad.net/yade/+question/683775

Status: Needs information => Open

Rioual gave more information on the question:
...Yes, my question concerns more specifically the possibility of creating a 
physical cylindrical beam
 joining two spherical particles as a model of a solid bridge.(**)
 Each cylindrical beam will have the following parameters, length, cross 
section, young modulus, shear modulus
 and tensile strength 
??
Thanks for your views,
Fr.  

(**) and also the possbility to join a particle, with several beams
(bridges), to its neighbouring particles, of course.

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Re: [Yade-users] [Question #683775]: modelling "solid bridges" between particles

2019-09-10 Thread Deepak
Question #683775 on Yade changed:
https://answers.launchpad.net/yade/+question/683775

Status: Open => Answered

Deepak proposed the following answer:
Hi, 
 >   Each cylindrical beam will have the following parameters, length, cross 
 > section, young modulus, shear modulus
 and tensile strength

gridNode/gridConnections does exactly this, there are a few examples in
[1]  and for the physics of this model  see [2]

[1] https://gitlab.com/yade-dev/trunk/tree/master/examples/grids
[2] https://doi.org/10.1016/j.ecoleng.2013.05.002

But I am not sure if grids are intended to undergo 'breakage'

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Re: [Yade-users] [Question #683775]: modelling "solid bridges" between particles

2019-09-10 Thread Bruno Chareyre
Question #683775 on Yade changed:
https://answers.launchpad.net/yade/+question/683775

Bruno Chareyre proposed the following answer:
I appreciate you are looking for something like [1], already mentioned by 
others.
Yes it can break [2], in principle, although it may not be a super-stable 
feature.
Bruno

[1] https://www.youtube.com/watch?v=H8VCdsW6wVA
[2] https://www.youtube.com/watch?v=oTS7aFu-ycE

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Re: [Yade-users] [Question #683775]: modelling "solid bridges" between particles

2019-09-10 Thread Rioual
Question #683775 on Yade changed:
https://answers.launchpad.net/yade/+question/683775

Status: Answered => Solved

Rioual confirmed that the question is solved:
Thanks Bruno Chareyre, that solved my question.

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