Re: [Yade-users] [Question #682898]: Which model is used to calculate the cohesive force?
Question #682898 on Yade changed: https://answers.launchpad.net/yade/+question/682898 Jérôme Duriez proposed the following answer: Hi, You have details about Law2_ScGeom6D_CohFrictPhys_CohesionMoment e.g. in [1]. With respect to doc syntax: - an in [2] is CohFrictPhys.normalAdhesion (a force quantity) = F_n^A in Eq. (6) of [1] - on the other hand, CohFrictMat.normalCohesion is a stress quantity (the doc tells it, here), and corresponds to the \sigma_A parameter in Eq. (6) of [1]. [1] https://link.springer.com/article/10.1007%2Fs10035-016-0687-0 [2] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Law2_ScGeom6D_CohFrictPhys_CohesionMoment -- 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 #682898]: Which model is used to calculate the cohesive force?
Question #682898 on Yade changed: https://answers.launchpad.net/yade/+question/682898 Robert Caulk proposed the following answer: I don't think there are any papers on Yade's cohFrictPhys. The closest is probably JCFpmPhys (theory highlighted in [1]) but there are many variations of the original bonded particle model in literature [2]. [1]Scholtès, L. U. C., and Frédéric-Victor Donzé. "Modelling progressive failure in fractured rock masses using a 3D discrete element method." International Journal of Rock Mechanics and Mining Sciences 52 (2012): 18-30. [2]Potyondy, David O., and P. A. Cundall. "A bonded-particle model for rock." International journal of rock mechanics and mining sciences 41.8 (2004): 1329-1364. -- 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 #682898]: Which model is used to calculate the cohesive force?
Question #682898 on Yade changed: https://answers.launchpad.net/yade/+question/682898 gaoxuesong posted a new comment: Thanks. Now i understand the adhesion attribute in the CohFricPhys material and it is a adhesion strength. Sorry i don't understand the c++ code. Is there any papers to help understand the involved theory about the bond breaking when normal force below the defined adhesion strength. Thanks again. -- 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 #682898]: Which model is used to calculate the cohesive force?
Question #682898 on Yade changed: https://answers.launchpad.net/yade/+question/682898 Status: Open => Answered Robert Caulk proposed the following answer: Please reference line numbers like this [1] if you wish to solicit a legitimate discussion. Next, it would be helpful if you tried to use the correct geomechanical jargon. In this case "cohesive force" is ambiguous since we do not know if you are referring to a force or a strength. It seems you are not interested in the force, but instead the strength? Strength in cohFrictPhys is defined by an adhesion [2], which has the same units as the force. It is user defined. It is simply a criteria for bond breakage; if the normal force [1] decreases below the user defined adhesion, the bond breaks. [1] https://gitlab.com/yade-dev/trunk/blob/master/pkg/dem/CohesiveFrictionalContactLaw.cpp#L116 [2]https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.CohFrictPhys.normalAdhesion -- 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 #682898]: Which model is used to calculate the cohesive force?
Question #682898 on Yade changed: https://answers.launchpad.net/yade/+question/682898 gaoxuesong posted a new comment: I have checked the definition of CohFrictMat. So the normalCohesion and shearCohesion is the an and as appeared in the documentation of Law2_ScGeom6D_CohFrictPhys_CohesionMoment? -- 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 #682898]: Which model is used to calculate the cohesive force?
New question #682898 on Yade: https://answers.launchpad.net/yade/+question/682898 Hi. I have looked through the document for Law2_ScGeom6D_CohFrictPhys_CohesionMoment. It gives the formula to calculate the contact force. Fn=min(kn∗(un−upn),an). an is the cohesive force. But is there any material to refer to get the detailed description about cohesive force, an? Thanks, Xuesong -- 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
