Question #679566 on Yade changed: https://answers.launchpad.net/yade/+question/679566
Robert Caulk posted a new comment: Thank you for the MWE >> this is a method to simulate undrained condition in triaxial test without fluid. Do you have a reference for this? >>This is a purely conceptual problem. In lab you can impose total confining stress, yes, but the effective confining stress is changing nevertheless. In DEM you don't simulate the fluid, so which one do you record? Effective or total? Am I mistaken or should strain rate technically depend on maintaining pore pressure equilibrium for a consolidated undrained test? In that case the effective confining stress should remain constant. Right? Correct me if I am wrong, but the assumption that your volume will not change by simply applying an axial strainRate and lateral -strainRate/2 is incorrect for a dry cubical packing of frictionally interacting spheres. Consider the role of the fluid pressure in an undrained triaxial test, it does not allow the force due to friction between sand grains to increase. In your case, the particles continue to "consolidate" (overlap) since the pore pressure is not modeled. If they are consolidating, the volume is changing and the packing is not expanding outwards with your walls, resulting in a decrease of confining pressure. I don't see how this model could represent the consolidated undrained shear strength. -- 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
