*HEADING
: SIMPLE CONTACT TEST, POSITIVE GAP CLEARANCE  [GAPUNI]
Linear Perturbation steps with Load Case
*NODE
 1, 0.,0.
*NODE,NSET=GAP
 4,5.,0.
 10,5.,-7.0
*NGEN
 1,4
*ELEMENT,TYPE=B23, ELSET=EALL
 1,1,2
*ELGEN, ELSET=EALL
 1,3
*BEAM SECTION,SECTION=CIRC,MATERIAL=A1, ELSET=EALL
 .1, 
*MATERIAL,NAME= A1
*ELASTIC
 27.E6, 
*ELEMENT,TYPE=GAPUNI,ELSET=GAP1
121,4,10
*GAP,ELSET=GAP1
0.5,0.,-1.,0.
*STEP,INC=20
           TEST BY APPLYING A LOAD AT TIP NODE
*STATIC
0.25,1.0
*BOUNDARY,OP=NEW
 1,1,2
 1,6
 10,1,2
*CLOAD
4,2,-5.E1
*PRINT,CONTACT=YES
*EL PRINT
S,E
*NODE PRINT
COORD, U
RF,CF
*OUTPUT,FIELD
*ELEMENT OUTPUT,ELSET=GAP1
S,E
*OUTPUT,FIELD
*NODE OUTPUT,NSET=GAP
U,
RF,
*END STEP

*STEP,PERTURBATION
*STATIC
*LOAD CASE,NAME="CLOAD-1"
*CLOAD
4,2,-5.E1
*END LOAD CASE
*LOAD CASE,NAME="CLOAD-2"
*CLOAD
4,2,-10.E1
*END LOAD CASE
*OUTPUT,FIELD
*NODE OUTPUT,NSET=GAP
U,
RF,
*END STEP