master-slave nodes in OOFEM

[Jiri Mares]

Dear all,
many thanks for great software. I started using it and I found it really cool.
I created a simple model in oofem and imported in to NextFEM. I am investigating interoperability between these two.
My question is: Is master-slave DOF principle implemented in NextFEM? All works fine for me apart from examples where I used master-slave DOF’s. Just curious whether this has already been implemented.
The software looks great. Wish you success and many users.
best regards
jiri

[NextFEM Admin]

Dear Jiri,
many thanks for your interest and grats on NextFEM Designer. The master-slave relationship is obtained through rigidarmnodes in OOFEM.
Please remind that not all the files made for OOFEM could be imported in Designer, since we support only a part of the element library and sintax.
If you encounter any troble with master-slave node models please upload here your model, I’ll be glad to give a hand.
Regards

[Jiri Mares]

Many thanks for your quick answer. I may be wrong – I am just learning oofem syntax.
My ‘A’ shaped structure is formed of two elements. Apex is supposed to be a ‘pin’.
I introduced 201 node and coupled it with node 20. Seems to be producing results when run oofem from command line – I am getting 0.000014 m vertical (z) deflection of apex but very high number when run from NexFEM. I have not checked analytical results I am just getting discrepancy between these two runs.
Many thanks again.
best regards
jiri

The example is here:

C:\Users\jxmadmin\01ownCloudWorking\03_DEV\SOURCECODE_OOFEM\results\test000.out
triangle with pinned connection at apex
LinearStatic nsteps 1 nmodules 0
domain 3dBeam
OutputManager tstep_all dofman_all element_all
ndofman 4 nelem 2 ncrosssect 1 nmat 1 nbc 3 nic 0 nltf 2 nset 2
node 10 coords 3 0 0 0
node 20 coords 3 1 0 1
node 201 coords 3 1 0 1 dofidmask 6 1 2 3 4 5 6 doftype 6 1 1 1 1 0 1 mastermask 6 20 20 20 20 0 20
node 30 coords 3 2 0 0
Beam3d 1 nodes 2 10 20 mat 1 crossSect 1 refAngle 0 boundaryLoads 2 3 1
Beam3d 2 nodes 2 30 201 mat 1 crossSect 1 refAngle 0 boundaryLoads 2 3 2
SimpleCS 1 area 0.00649 Iy 0.000141 Iz 0.000141 Ik 0.000141 shearareay 0.001298 shearareaz 0.003245 beamShearCoeff 1.e18 thick 0.4 width 0.2
IsoLE 1 d 0 E 210000000 n 0.3 tAlpha 1.2E-05
BoundaryCondition 1 loadTimeFunction 1 DOFs 5 1 2 3 4 6 values 5 0 0 0 0 0 set 1
BoundaryCondition 2 loadTimeFunction 1 DOFs 5 1 2 3 4 6 values 5 0 0 0 0 0 set 2
ConstantEdgeLoad 3 loadTimeFunction 2 csType 0 Components 1 -10 DOFs 1 3
#set 3
ConstantFunction 1 f(t) 1.0
PiecewiseLinFunction 2 npoints 2 t 2 0.0 1 f(t) 2 0.0 1.0
set 1 nodes 1 10
set 2 nodes 1 30

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