Re: [Yade-users] [Question #689015]: Simple question: calculating kn
Question #689015 on Yade changed: https://answers.launchpad.net/yade/+question/689015 Status: Answered => Solved mrhappy confirmed that the question is solved: Thank you all for your explanation. I really appreciate it. -- 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 #689015]: Simple question: calculating kn
Question #689015 on Yade changed: https://answers.launchpad.net/yade/+question/689015 Chareyre proposed the following answer: Young in FrictMat does have the meaning of Young modulus in Hooke's law for that material. «material» refering to granular material, not solid constituent. Bruno Le mar. 3 mars. 2020 09:27, Jérôme Duriez < question689...@answers.launchpad.net> a écrit : > Question #689015 on Yade changed: > https://answers.launchpad.net/yade/+question/689015 > > Jérôme Duriez posted a new comment: > Indeed, it may be better to state that FrictMat.young in this case does > not have the same physical meaning, or physical interpretation, than > Hooke's law Young modulus. > > -- > 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 > -- 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 #689015]: Simple question: calculating kn
Question #689015 on Yade changed: https://answers.launchpad.net/yade/+question/689015 Jérôme Duriez posted a new comment: Indeed, it may be better to state that FrictMat.young in this case does not have the same physical meaning, or physical interpretation, than Hooke's law Young modulus. -- 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 #689015]: Simple question: calculating kn
Question #689015 on Yade changed: https://answers.launchpad.net/yade/+question/689015 Chareyre proposed the following answer: > FrictMat.young has no physical meaning This is defying my understanding of what can be called a physical meaning. :) I agree that reading documentation is better than arguing about unspecified papers, anyway. Bruno Le lun. 2 mars. 2020 16:33, Jérôme Duriez < question689...@answers.launchpad.net> a écrit : > Question #689015 on Yade changed: > https://answers.launchpad.net/yade/+question/689015 > > Jérôme Duriez proposed the following answer: > Since FrictMat.young has no physical meaning when using > Ip2_FrictMat_FrictMat_FrictPhys (which is understated here), another > reason could be "why not 2, or even 10" ;-) > > This would just modify the input value for this stress-like stifness > parameter. Where any input value, for any formulation with 2 or 10 or.. > , would be equally as correct as long as they give satisfactory results. > > PS : Would you feel more confortable reading [1] ? (which does reflect > the source code at [2], and your observations) > > [1] > https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Ip2_FrictMat_FrictMat_FrictPhys > [2] > https://gitlab.com/yade-dev/trunk/-/blob/master/pkg/dem/FrictPhys.cpp#L37 > > -- > 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 > -- 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 #689015]: Simple question: calculating kn
Question #689015 on Yade changed: https://answers.launchpad.net/yade/+question/689015 Jérôme Duriez proposed the following answer: Since FrictMat.young has no physical meaning when using Ip2_FrictMat_FrictMat_FrictPhys (which is understated here), another reason could be "why not 2, or even 10" ;-) This would just modify the input value for this stress-like stifness parameter. Where any input value, for any formulation with 2 or 10 or.. , would be equally as correct as long as they give satisfactory results. PS : Would you feel more confortable reading [1] ? (which does reflect the source code at [2], and your observations) [1] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Ip2_FrictMat_FrictMat_FrictPhys [2] https://gitlab.com/yade-dev/trunk/-/blob/master/pkg/dem/FrictPhys.cpp#L37 -- 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 #689015]: Simple question: calculating kn
Question #689015 on Yade changed: https://answers.launchpad.net/yade/+question/689015 Status: Open => Answered Marcus Moravia proposed the following answer: Hi, the normal stiffness in the contact is calculated by the harmonic mean of the individual rigidities of the respective bodies. As the calculation is for two bodies in contact, behold, the number 2 appears in the numerator! I hope this helps, Marcus. -- 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 #689015]: Simple question: calculating kn
New question #689015 on Yade: https://answers.launchpad.net/yade/+question/689015 I have read in many journal papers using YADE [1] that kn = E*(Ra*Rb)/(Ra+Rb). However, when I use YADE and calculate kn, I get kn = 2*E*(Ra*Rb)/(Ra+Rb). I also read [2] and I did not see where the 2 is coming from. Can you help me identify it? Thanks! [1] A DEM model for soft and hard rocks: Role of grain interlocking on strength [2] https://yade-dem.org/doc/formulation.html#kinematic-variables -- 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
