Hello CalculiX users,
I have another question regarding example on T3D2 elements + spring elements compared with another model that is composed with a C3D4 +springs.
These are the inp files:
T3D2:
*Node
1, 69.282, -40, 0
2, -69.282, -40, 0
3, 0, 80, 0
4, 0, 0, 200
5, 69.282, -40, -100
6, -69.282, -40, -100
7, 0, 80, -100
*Element, type=T3D2, elset=all
1, 1, 4
2, 2, 4
3, 3, 4
7, 1, 2
8, 2, 3
9, 3, 1
*Element, Type=SPRINGA, Elset=all
4, 1, 5
5, 2, 6
6, 3, 7
*Nset, nset=Set-1
1, 2, 3, 4, 5, 6, 7
*Elset, elset=Set-1
1, 4, 5, 6,
*Solid Section, elset=all, material=Material-1
200000000,
*Nset, nset=base
5, 6, 7
*Nset, nset=load
4
*Nset, nset=vertical
1, 2, 3
*Material, name=Material-1
*Elastic
200000000000000, 0.3
*Boundary
base, 1, 3
vertical, 1, 2
*Spring, elset=all
10000.
*Step,nlgeom=no,
*Static
*Cload
load, 3, 1000
*NODE PRINT, nset=Set-1
U,RF
*EL PRINT,ELSET=all,FREQUENCY=100
S,E
*NODE FILE,OUTPUT=2D
U,RF
*EL FILE
S,NOE,E
*End Step
C3D4:
*Node
1, 69.282, -40, 0
2, -69.282, -40, 0
3, 0, 80, 0
4, 0, 0, 200
5, 69.282, -40, -100
6, -69.282, -40, -100
7, 0, 80, -100
*Element, type=C3D4, elset=all
1, 1, 3, 2, 4
*Element, Type=SPRINGA, Elset=all
4, 1, 5
5, 2, 6
6, 3, 7
*Nset, nset=Set-1
1, 2, 3, 4, 5, 6, 7
*Elset, elset=Set-1
1, 4, 5, 6,
*Solid Section, elset=all, material=Material-1
200000000,
*Nset, nset=base
5, 6, 7
*Nset, nset=load
4
*Nset, nset=vertical
1, 2, 3
*Material, name=Material-1
*Elastic
200000000000000, 0.3
*Boundary
base, 1, 3
vertical, 1, 2
*Spring, elset=all
10000.
*Step,nlgeom=no,
*Static
*Cload
load, 3, 1000
*NODE PRINT, nset=Set-1
U,RF
*EL PRINT,ELSET=all,FREQUENCY=100
S,E
*NODE FILE,OUTPUT=2D
U,RF
*EL FILE
S,NOE,E
*End Step
The displacements that I get from .dat files are similar, but the forces on the nodes of the C3D4 element are wrong. Could you help me please?