*Heading
*Node
1, 0.0,0.0,0.0,
2, 20.0,0.0,0.0
3, 20.0,5.0,0.0
4, 0.0,5.0,0.0
5, 10.0,0.0,0.0
6, 20.0,2.5,0.0
7, 10.0,5.0,0.0
8, 0.0,2.5,0.0
9, 10.0,2.5,0.0
*USER ELEMENT,TYPE =U9, NODES=9,PROPERTIES=9,coordinates=3
1,2,3,4,5,6
9,1,2,3,4,5,6,7,9
*ELEMENT,TYPE=U9,ELSET=UEL1
1,1,2,3,4,5,6,7,8,9
*UEL PROPERTY,ELSET=UEL1
1.0,0.2e4,0,0,0.2e4,0.1e4,0.0460e-6,0.1062e-12,0
*Nset,nset=FixedBoundary
1,4,8
*Nset,nset=Potential
9
*Boundary
FixedBoundary,ENCASTRE
*Boundary
Potential,7,9,0.5
*STEP,PERTURBATION
*STATIC
*NODE PRINT
U
RF
COORD
*ELEMENT MATRIX OUTPUT,elset=UEL1,output file=user defined,file name=SM,stiffness=yes
*endstep