> Thank you for your comments. I can understand it. You know, from the > mechanical concept, the shear modulus (G) can be represented by E/2*(1 > +v) for homogeneous isotropic materials, here E is young modulus, v is > poisson ratio. So, can we decide G_over_E is equal to 1/2*(1+v) > directly? Can we use 1/2*(1+v) to calculate kt/kn? > Thank you so much.
No, I don't think that would work; the notation in the code (G_over_E) is a little misleading again, G=kt/A and E=kn/A on the interaction level are different from Young and shear modulus for continuum (in the sense of how a RVE of particles would behave globally), depending on packing configuration etc. Eq (3.39), pg 51 of my thesis gives some a relationship between kt/kn and Poisson's ratio based on the microplane theory analogy (see the article referenced for details), but there is a number of suppositions, such as fixed particle radius (otherwise the dimensional analysis would have to take in account more parameters). (pg 52 shows that it matches in a sense) HTH, Vaclav _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
