Re: [Yade-users] [Question #668072]: Elastic modulus in Hertz-Mindlin contact
Question #668072 on Yade changed: https://answers.launchpad.net/yade/+question/668072 Bruno Chareyre posted a new comment: Thx for feedback. B -- 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 #668072]: Elastic modulus in Hertz-Mindlin contact
Question #668072 on Yade changed: https://answers.launchpad.net/yade/+question/668072 Fu zuoguang posted a new comment: Dear Prof. Chareyre and all users, I now think my question can be answered by understanding that 'Young' in H-M system in Yade is exactly refered to as elastic modulus and there is always a transformation as G=E/[2*(1+v)] for its usage. Some more about the H-M system are necessary to be summarized here. For two spheres having the same material and radius, (a) the solution of the normal part of the contacting are provided by Hertz theory and the normal stiffness obeys KN = (3*R_eq*G**2/(1-v)**2)**(1/3)*(F_n**(1/3)); (R_eq = 0.5*R) (b) the solution of the tangential part starts with a simplification that there is only no-slip occuring at the contact interface, so the tangential stiffness is only related to the normal one and is shown as KT = 2*(1-v)/(2-v)*KN. For testing, I picked out a contact from all in one case and then recorded all needed parameters as E=5.0e10(Pa) v(Poisson's ratio)=0.2 R=1.0E-04(m) F_n=1.89698e-2(N). The calculation results are that KN=1.56858e5(N/m) and KT=1.39430e5(N/m) These are the same as provided by Yade. So the Yade's calculation has no question at all, whereas more details of especially the complex contact model are suggested in the manual (Chapters 7) Yours, Zuoguang Fu -- 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 #668072]: Elastic modulus in Hertz-Mindlin contact
Question #668072 on Yade changed: https://answers.launchpad.net/yade/+question/668072 Status: Answered => Solved Fu zuoguang confirmed that the question is solved: Thanks Bruno Chareyre, 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
Re: [Yade-users] [Question #668072]: Elastic modulus in Hertz-Mindlin contact
Question #668072 on Yade changed: https://answers.launchpad.net/yade/+question/668072 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, I don't know precisely, but the H-M in Yade also has a "Poisson" parameter... I would suggest to check the code to be sure how they are converted. HTH Bruno -- 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
