yade-users team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

> Unfortunately, the correction does not affect my results. Indeed, as I 
> said, the 3 strain rates were equal, and this is what the equations 
> below should provide if I understand well. 
Yes, they should now.
> Maybe I wasn't clear enough. I attached here the evolutions of the 3 
> strains during the same test. You can see the delay between the 3 
> strains to reach the desired stress level. I told you about 
> "relaxation" effects because of the transition between compression and 
> dilation when the axial stress (see E2) level is reached. I tried by 
> decreasing the maxVel and by decresing the time step, but I still have 
> the same delay...
I don't really understand your plot. There is no stress.

> In fact, I don't really know if my problem (say, less deformation in 
> the axial direction than in the radial ones to reach the same stress 
> level) is really a problem... I would expect to have identical 
> deformations (and I insist on deformation and not displacement!) in 
> each directions to produce the same increase in stress, assuming that 
> the sample is isotropic and homogeneous, but it seems that I was wrong...
I agree : isotropic stress on an isotropic material is obtained after 
isotropic strain.
Perhaps your packing is not isotropic? Or there is a bug somewhere...

> ps: I found another tiny error in TriaxialStressController. It was in 
> the computation of the wall thickness (see rev 2068). It affected the 
> case where the thickness parameter was not specified.
Thanks! I wondered why I never noticed problems with the previous code, 
the reason is this assignment was never used in my case (always using 
the user-defined non-default value).

Bruno