yade-users team mailing list archive

[Anton Gladky <gladky.anton@xxxxxxxxx>]

Hi All,

"A new algorithm to model the dynamics of 3-D bonded rigid bodies with
rotations"
http://www.springerlink.com/content/l2306412v1004871/

ESyS-particles uses these formulas for creating "rock model". I have tested
it and it works very good.

RockPM uses similar but simplified schema for connections between particles.
There is only normal interaction implemented.

______________________________

Anton Gladkyy


2009/11/17 luc scholtes <lscholtes63@xxxxxxxxx>

> Hi Boon and others,
>
> Actually, I am also interested in fractured rock mass modelling. To
> implement a Joint Model in YADE is also a part of my plans for the next
> future. I did not have the time for it until now, but it will be interesting
> to exchange about the possible strategies to do it efficiently. As you
> noticed, the key point is to identified joint interactions before starting
> the simulation, but, once this has been done, I think that writing the
> corresponding constitutive law (assigning the joint plane orientation to the
> contact interaction and providing characteristic features such as dilation
> as a function of shear displacement) would not be a big problem (especially
> with Anton and vaclav works on RockPM and ConcretePM).
>
> I hope to have some time to work on it soon
>
> Cheers
>
>   Luc
>
>
> 2009/11/14 boon chiaweng <booncw@xxxxxxxxxxx>
>
>  Thanks for helping.  The constitutive law is relevant but not entirely.
>> An example of a problem that I would like to look at is wedge stability of
>> slopes.  E.g., create two joint planes intersecting the corner of a box, and
>> the wedge will slide.
>> I'm not looking at brittle fracture of bonded material, but would like to
>> know how to insert a joint plane before simulation.  So far, I've only
>> stumbled across particle generation in YADE.
>>
>>
>> Yours sincerely,
>>
>> Boon
>>
>> ------------------------------
>> From: gladky.anton@xxxxxxxxx
>> Date: Fri, 13 Nov 2009 14:52:07 +0100
>> To: yade-users@xxxxxxxxxxxxxxxxxxx
>> Subject: Re: [Yade-users] How to create a rock joint?
>>
>>
>> See RockPM constitutive law
>> ______________________________
>>
>>
>> Anton Gladkyy
>>
>>
>> 2009/11/13 Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>
>>
>> I don't think anything like this is implemented yet. It is difficult for
>> me to give advices without a precise explanation of the modeling you want.
>> If you need the list of interactions intersecting a plane, it should not be
>> too hard.
>> Something like :
>>
>> FOREACH (interaction)
>> {
>>   if (interaction->body1 on one side && interaction->body2 on the other
>> side)
>>    intersected_list.push_back(interaction)
>>   //or simply
>>    modify_properties(interaction)
>> }
>>
>> I guess you don't need that at each iteration, so performance is not an
>> issue.
>>
>>
>> Bruno
>>
>> boon chiaweng a écrit :
>>
>> I am planning to use YADE for rock engineering.  The joint i was refering
>> to is a joint plane.  I would initially like to have a block of rock mass.
>>  And by specifiying the dip direction and dip angle of the joint planes, the
>> block of rock mass will be cut/intersected.  Then I will have to identify
>> the polyhedral blocks formed from the joint planes.    Does anyone know how
>> to do this? Or has done it?
>>   Yours sincerely,
>>  Boon
>>
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>> --
>>
>> _______________
>> Chareyre Bruno
>> Maître de Conférences
>>
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