Question #675377 on Yade changed: https://answers.launchpad.net/yade/+question/675377
Robert Caulk proposed the following answer: Hello Mehdi, Ok, thankyou for clearly elaborating. It seems you might be confused about the definition of the transformation matrix in this case. Here, O.cell.trsf, is the deformation gradient which can be used to determine strain, but by itself simply gives you a transformation from one state to another. If you want to pull the natural strain from the deformation gradient, you would do something like: strain = .5*(O.cell.trsf+O.cell.trsf.transpose()) - I which is conveniently provided for you as O.cell.getSmallStrain() [1]. Now, if you want the velGrad to reflect equal rates in dv_x/dy and dv_y/dx, you will need to add that: O.cell.velGrad=Matrix3(0,rate,0, rate,0,0, 0,0,0) Please let me know if this answers your question or not :-) Cheers, Robert [1]https://yade- dem.org/doc/yade.wrapper.html#yade.wrapper.Cell.getSmallStrain -- 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 : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
