Re: [Yade-users] [Question #220152]: Cylinder Geometry Problem
thank you very much 在 2013-05-27 14:11:33，Jan Stránský question220...@answers.launchpad.net 写道： Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Jan Stránský posted a new comment: Hello, just for your information, in latest git version, I created a very simple (perhaps naive :-) script to simulate triaxial test on cylinder (examples/concrete/triax.py), so you can try it. Best regards Jan 2013/5/13 pingyang.1...@163.com question220...@answers.launchpad.net Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 pingyang.1...@163.com posted a new comment: Hello, teacher I want to simulate triaxial experiments of standard cylinder specimens which radius is 0.025 meters and lenght is 0.1 meters, could you tell me how boundary conditions should be set ? Regards -- You received this question notification because you are a member of yade-users, which 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 -- You received this question notification because you are a member of yade-users, which 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 ___ 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 pingyang.1...@163.com posted a new comment: thank you very much 在 2013-05-27 14:11:33，Jan Stránský question220...@answers.launchpad.net 写道： Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Jan Stránský posted a new comment: Hello, just for your information, in latest git version, I created a very simple (perhaps naive :-) script to simulate triaxial test on cylinder (examples/concrete/triax.py), so you can try it. Best regards Jan 2013/5/13 pingyang.1...@163.com question220...@answers.launchpad.net Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 pingyang.1...@163.com posted a new comment: Hello, teacher I want to simulate triaxial experiments of standard cylinder specimens which radius is 0.025 meters and lenght is 0.1 meters, could you tell me how boundary conditions should be set ? Regards -- You received this question notification because you are a member of yade-users, which 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 -- You received this question notification because you are a member of yade-users, which 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 -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Jan Stránský posted a new comment: Hello, just for your information, in latest git version, I created a very simple (perhaps naive :-) script to simulate triaxial test on cylinder (examples/concrete/triax.py), so you can try it. Best regards Jan 2013/5/13 pingyang.1...@163.com question220...@answers.launchpad.net Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 pingyang.1...@163.com posted a new comment: Hello, teacher I want to simulate triaxial experiments of standard cylinder specimens which radius is 0.025 meters and lenght is 0.1 meters, could you tell me how boundary conditions should be set ? Regards -- You received this question notification because you are a member of yade-users, which 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 -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Bruno Chareyre posted a new comment: Very nice Jan, I'll try eventually. I suggest to always put author references in the example scripts as for any other file. It is sometimes useful to know where to ask details (especially when it comes to repository cleaning). Best. Bruno -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 pingyang.1...@163.com posted a new comment: Hello, teacher I want to simulate triaxial experiments of standard cylinder specimens which radius is 0.025 meters and lenght is 0.1 meters, could you tell me how boundary conditions should be set ? Regards -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Jan Stránský posted a new comment: Hello, I must say I haven't understood your question really well.. Do you want to simulate a cylindrical shaped assembly of many particles? If so, what kind of boundary conditions would you like to prescribe and where? :-) If you want to presribe zero displacement of certain particles, you can set blockedDOFs parameter [1], for instance like this: boundary [] # list of particles, whise radius is grater than certain limit 'rad' for b in O.bodies: pos = b.state.pos r = Vector3(pos[0],pos[1],0).norm() # distance from z axis if r rad: boundary.append(b) for b in boundary: b. state.blockedDOFs = 'xy' # blocked x and y displacement, z displacement is still allowed Appliyng axial displacement / force, you can use facets or walls, or use the same trick as above to block some DOFs of bottom and top layer of particles and prescribe some z velocity to them If you want to aplly some transverse prestress, this might be a bit more tricky, but definitely solvable :-) If I understood your question wrong, sorry for spamming. In case of any further questions, do not hesitate to ask. Jan [1] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.State.blockedDOFs 2013/5/13 pingyang.1...@163.com question220...@answers.launchpad.net Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 pingyang.1...@163.com posted a new comment: Hello, teacher I want to simulate triaxial experiments of standard cylinder specimens which radius is 0.025 meters and lenght is 0.1 meters, could you tell me how boundary conditions should be set ? Regards -- You received this question notification because you are a member of yade-users, which 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 -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Luc Scholtès posted a new comment: Hello PingYang, I guess your question is: Is it possible to simulate triaxial compressions on cylindrical specimens? If yes, first, you should open a new thread/question, or maybe look at previous messages in relation to this topic (have a look there: https://answers.launchpad.net/yade). Second, if I may answer, it is not possible to simulate triaxial tests on cylindrical specimens at the moment. To my knowledge, there is no predefined engine capable of doing that in the source code and you will need to implement a new one by yourself or maybe code it through python scripting (is that even possible?...). However, triaxial compressions can be simulated on cubical specimens quite easily (either using external walls/boxes or periodic boundary conditions). Have a look at the examples directory in the source code, you may find useful things. If no, sorry for misunderstanding your question. Luc -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Status: Answered = Solved MOHAMMAD MOHSENI confirmed that the question is solved: Thanks Jan Stránský, that solved my question. -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 MOHAMMAD MOHSENI posted a new comment: Thanks Bruno , it helps a lot. -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Status: Open = Answered Bruno Chareyre proposed the following answer: Hi Mohammad, If I don't miss something, you don't have to make the wall finite. You can use infinite planes or boxes larger than the cylinder. I strongly recommend this as it will avoid the contact-on-edge problems of coplanar facets. Consider having a look at the triax-tutorial examples, where boundary conditions are applied by large boxes (or, even simpler, go to the generate tab in the GUI and generate a triaxial test). -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Status: Answered = Open MOHAMMAD MOHSENI is still having a problem: Hi ,thanks for this the thing is I want this wall to move , imagine a box full of spheres and one of the walls will move to inside and push the spheres to another side .I want to create this moving wall . is it possible with facets ? Mohammad -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Status: Open = Answered Jan Stránský proposed the following answer: Hi Mohammad, it is possible. You can directly prescribe position of certain facets (or prescribe velocity, which is preferable), or you can use TranslationEngine. movingFacets = [facet1,facet2,...,facetN] for f in movingFacets: f.state.vel = Vector3(velx,vely,velz) I have not used it myself, but isn't the same behavior possible also with infinite walls? Jan 2013/1/26 MOHAMMAD MOHSENI question220...@answers.launchpad.net Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Status: Answered = Open MOHAMMAD MOHSENI is still having a problem: Hi ,thanks for this the thing is I want this wall to move , imagine a box full of spheres and one of the walls will move to inside and push the spheres to another side .I want to create this moving wall . is it possible with facets ? Mohammad -- You received this question notification because you are a member of yade-users, which 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 -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Status: Answered = Open MOHAMMAD MOHSENI is still having a problem: Hi Jan I will try this method you have mentioned . by using infinite wall ,I can move the wall easily but as I am using it to model a die fill process ,I need to make the wall finite . Many thanks for your guides. Mohammad -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Status: Open = Answered Jan Stránský proposed the following answer: Hello, next time please always write what error you got, it is much easier for others to help you. In this specific case: utils has no function facetCylinder, try geom.facetCylinder instead. Furthermore, there is ) missing at the end of your command. cheers Jan 2013/1/25 MOHAMMAD MOHSENI question220...@answers.launchpad.net New question #220152 on Yade: https://answers.launchpad.net/yade/+question/220152 I have tried constructing a cylinder using cylinder facet but get an error everytime. The code is below O.bodies.append(utils.facetCylinder(center, radius, height, orientation=Quaternion((1, 0, 0), 0), segmentsNumber=10, wallMask=7, angleRange=None, closeGap=False, **kw) Can anyone help me with this? Regards -- You received this question notification because you are a member of yade-users, which 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 -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 MOHAMMAD MOHSENI posted a new comment: many thanks for your help Jan . can I just ask another simple question ? How you can make a finite wall ? I just write this line which makes an infinite wall but I want to fit this moving wall in another box. O.bodies.append(utils.wall(position=(5,0,4), axis=0, sense=-1)) MOHAMMAD -- You received this question notification because you are a member of yade-users, which 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 #220152]: Cylinder Geometry Problem
Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 Jan Stránský proposed the following answer: Hello Mohammad, for creating finite wall, you can use facets [1]. Either build your wall manually wit as many facets as you want (e.g. two triangles could be enough), or you can try to use geom.facetPolygon [2] (I peronally have never used it). In case of another questions, don't hesitate to ask :-) good luck Jan [1] https://yade-dem.org/doc/yade.utils.html#yade.utils.facet [2] https://yade-dem.org/doc/yade.geom.html#yade.geom.facetPolygon 2013/1/25 MOHAMMAD MOHSENI question220...@answers.launchpad.net Question #220152 on Yade changed: https://answers.launchpad.net/yade/+question/220152 MOHAMMAD MOHSENI posted a new comment: many thanks for your help Jan . can I just ask another simple question ? How you can make a finite wall ? I just write this line which makes an infinite wall but I want to fit this moving wall in another box. O.bodies.append(utils.wall(position=(5,0,4), axis=0, sense=-1)) MOHAMMAD -- You received this question notification because you are a member of yade-users, which 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 -- You received this question notification because you are a member of yade-users, which 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
