Re: [Yade-dev] Question about parameters in SpheresContactGeometry

2009-02-18 Thread milauer
Again, without attachments. Find them here: http://beta.arcig.cz/~eudoxos/yade/shear-displacement.pdf and http://beta.arcig.cz/~eudoxos/yade/shear-slip.pdf === > (A) - maxUn (and other extrema of the variables contained in IntGeom, > including initial orientations) in IntPhysics is ok with me.

Re: [Yade-dev] Question about parameters in SpheresContactGeometry

2009-02-17 Thread Bruno Chareyre
You can always derive from the geometry class and add your own data members. But you still have access to inherited data members and methods, should you need those. maxUn can (should) be stored in InteractionPhysics, the same for cell volume, no? (A) - maxUn (and other extrema of the variable

Re: [Yade-dev] Question about parameters in SpheresContactGeometry

2009-02-17 Thread milauer
>> I don't use torsion and bending, but for the shear part, >> I never got the incremental algo to match with what small-strain FEM >> code computes for strains (production code, therefore assumed to be >> correct). > It is not the first time I read this but I must admit I never > understodd w

Re: [Yade-dev] Question about parameters in SpheresContactGeometry

2009-02-17 Thread Bruno Chareyre
Hi, it is probably question directed at me. Torsion, bending, but also shear code is implemented as incremental computation from angular velocities etc. Only shear motion is defined in an incremental form. Torsion/bending is relative to the initial positions. I don't use torsion and bending

Re: [Yade-dev] Question about parameters in SpheresContactGeometry

2009-02-14 Thread milauer
> * TODO: add torsion code, that will (if a flag is on) compute torsion > angle on the contact axis. > * > * TODO: add bending code, that will compute bending angle of the > contact axis > > The code for this is in CohesiveFrictionalContactLaw already, its been > developped by Cosurgi. Hi, it is p

[Yade-dev] Question about parameters in SpheresContactGeometry

2009-02-13 Thread Bruno Chareyre
Hi I see an inflation in the amount of members in this class. This class should be very simple, with no excess parameters for all those using the traditional Cundall's contact law. Which means, this class should have only rad1, rad2, penetrationDepth and normal, nothing more (except perhaps Con