Re: [Yade-users] [Question #650560]: micro parameters of Frictional material
Question #650560 on Yade changed: https://answers.launchpad.net/yade/+question/650560 Status: Open => Answered Klaus Thoeni proposed the following answer: Hi Seti, CohFrictMat is derived from FrictMat, i.e., it is also a FrictMat. If you need rolling resistance you can use CohFrictMat without cohesion: O.materials.append(CohFrictMat(alphaKr=1.7,young=30e6,poisson=0.4,density=2600,frictionAngle=radians(36.5),momentRotationLaw=True,etaRoll=.4,label='spheres')) By not specifying cohesion the default values are used [1]. HTH Klaus [1] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.CohFrictMat -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
[Yade-users] [Question #650740]: How to apply force on a certain area normally and at an angle?
New question #650740 on Yade: https://answers.launchpad.net/yade/+question/650740 I have a rectangular box of particles and I have to apply a certain force on the top on a given area. I don't know how to do it in the engine loop. This is my code for the geometry: sp = SpherePack() pred = pack.inAlignedBox((0,0,0),(3.5,2,2)) sp = pack.randomDensePack(pred, spheresInCell=100, radius=3.5e-2, rRelFuzz=0.5/1.5, returnSpherePack=False) O.bodies.append(sp) O.dt=0.0001 O.engines=[ ] -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #650554]: Is something going on in the background when pack.randomDensePack() is used?
Question #650554 on Yade changed: https://answers.launchpad.net/yade/+question/650554 Status: Open => Solved Hashir Ahmad confirmed that the question is solved: Thanks Jan Stránský, that solved my question. -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
[Yade-users] [Question #650560]: micro parameters of Frictional material
New question #650560 on Yade: https://answers.launchpad.net/yade/+question/650560 Hi all, How I can add rolling stiffness coefficient and plastic moment limit coefficient to frictional material property: it seams "alphaKr" and "etaRoll" just have been defined for CohFrictMat not FrictMat . e.g. O.materials.append(CohFrictMat(alphaKr=1.7,young=30e6,poisson=0.4,density=2600,frictionAngle=radians(36.5),normalCohesion=1.3e6,shearCohesion=1e6,momentRotationLaw=True,etaRoll=.4,label='spheres')) How I can see these parameters in frictional material since, to me are not just related to cohesive materials. Thanks Seti -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #650554]: Is something going on in the background when pack.randomDensePack() is used?
Question #650554 on Yade changed: https://answers.launchpad.net/yade/+question/650554 Jan Stránský posted a new comment: randomDensePack has two "modes" 1) (without spheresInCell) generates randomly all needed spheres compress them around predicate and crop them. For small number of particles it works ok, but for increasing number it take more and more time and becomes practically impossible to use. I would not like to use it for 500k particles :-) 2) spheresInCell = someValue uses just relatively few particles (someValue). Compress this limited number using periodic contact detection resulting in a periodic cube the resulting compressed packing is periodic, if you copy it by one period to any (axis) direction, the pieces fit together copy such periodic cube wherever necessary to fill the predicate, and crop to final shape So it uses (almost) the same time for any predicate size cheers Jan -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #650554]: Is something going on in the background when pack.randomDensePack() is used?
Question #650554 on Yade changed: https://answers.launchpad.net/yade/+question/650554 Status: Answered => Open Hashir Ahmad is still having a problem: Yeah sure! I would like to know more about it. Thanks Hashir -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #650554]: Is something going on in the background when pack.randomDensePack() is used?
Question #650554 on Yade changed: https://answers.launchpad.net/yade/+question/650554 Jan Stránský proposed the following answer: spheresInCell parameter (despite its name) is irrelevant here (I can elaborate more if you are interested). What is important is absolute number of particles in the simulation, which is given ba particle radius and predicate size. the window shadows for the time needed for rendering the scene, which is not negligible for this amount of particles Jan -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #650554]: Is something going on in the background when pack.randomDensePack() is used?
Question #650554 on Yade changed: https://answers.launchpad.net/yade/+question/650554 Hashir Ahmad posted a new comment: It recovers in my case as well. But when I play around with spheresInCell, radius or dimension of the predicates, I get an error: "Unable to shring cell due to maximum body size" Regards Hashir -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #650554]: Is something going on in the background when pack.randomDensePack() is used?
Question #650554 on Yade changed: https://answers.launchpad.net/yade/+question/650554 Status: Open => Answered Jan Stránský proposed the following answer: Thanks, I think it has nothing to do with randomDensePack, but again with number of particles. Around 500k particles is relatively high number. In my case, e.g. when I rotate the view, the window "shadows", but after a while it turns OK again. Does it recover also in your case, or does it freeze forever? Jan -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #650554]: Is something going on in the background when pack.randomDensePack() is used?
Question #650554 on Yade changed: https://answers.launchpad.net/yade/+question/650554 Jan Stránský posted a new comment: a working example please :-) I am getting KeyError: "No material labeled `walls'." thanks Jan -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
Re: [Yade-users] [Question #404479]: Triaxial test on a cylinder
Question #404479 on Yade changed: https://answers.launchpad.net/yade/+question/404479 Jan Stránský posted a new comment: Hello, please open a new question, your question is a different topic and this question is closed. Also please read [1], especially points 3 and 6 thanks Jan [1] https://yade-dem.org/wiki/Howtoask -- You received this question notification because your team yade-users is an answer contact for Yade. ___ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
