*HEADING
 : [FRAME3D]
 Elastic frame element with Marshall strut envelope  
**RESTART,WRITE
*NODE,NSET=NALL
 11, 0., 0.,  0.
 12, 1., 0.,  0.
*ELEMENT,TYPE=FRAME3D,ELSET=STRUT
 11,11,12
*FRAME SECTION,SECTION=PIPE,ELSET=STRUT,PINNED,YIELD=1.E6,BUCKLING
*** AREA = pi * (R**2 - Ri**2) = 1.0
 2.0, 0.08122693
 0.,0.,-1.
 30.E6,10.E6
*BUCKLING ENVELOPE
 0.95,0.02,0.03,0.004,0.28,0.02,0.39907307
*BUCKLING LENGTH
** 0.95, 0.94, 0.12, 0.15
 1.0, 1.0, 0.0, 0.0
*BOUNDARY
 11,1,3
 12,2,3
*AMPLITUDE,NAME=AMP
 0.0,0.0, 0.1,-.05, 0.2,-0.25, 0.3,-0.55, 
 0.4,0.0, 0.5,0.05, 0.6,0.6, 0.7,.57, 
 0.8,0.53, 0.9,0.56, 1.0,0.52, 1.1,0.41,
 1.2,0.47, 1.3,0.41, 1.4,0.2, 1.5, 0.35,
 1.6,0.28, 1.7,0.1, 1.8,0.5, 1.9,0.53,
 2.0,0.65
*STEP,INC=100
*STATIC
** 0.005,2.0,0.005,0.005
 0.02,2.0,0.02,0.02
*BOUNDARY,AMP=AMP
 12,1,1, 1.0
*NODE PRINT
 U,
 RF,
*EL PRINT
 SF,
 SEE,
 SEP,
*EL FILE,FREQ=5
 SF,
 SEE,
 SEP,
*NODE FILE,FREQ=5
 RF,U
*FILE FORMAT,ZERO INCREMENT
*END STEP