*HEADING
 SQUARE PLATE - ELASTIC BUCKLING  ( THERMAL EXP. BUCKLE ) 
*NODE
101,
105,1.,
501,0.,1.
505,1.,1.
*NGEN,NSET=YSYM
101,105
*NGEN,NSET=XSYM
101,501,100
*NGEN,NSET=YEDG
501,505
*NGEN,NSET=XEDG
105,505,100
*NFILL,NSET=TEMP
XSYM,XEDG,4,1
*ELEMENT,TYPE=STRI3,ELSET=EPRINT
1,101,102,202
17,101,202,201
*ELGEN,ELSET=EPRINT
1,4,1,1,4,100,4
17,4,1,1,4,100,4
*SHELL SECTION,MATERIAL=A1,ELSET=EPRINT
0.01,3
*MATERIAL,NAME=A1
*ELASTIC
1.E8,0.3
*EXPANSION
1.E-6, 
*BOUNDARY
YSYM,YSYMM
XSYM,XSYMM
YEDG,3
YEDG,5
XEDG,3
XEDG,4
XEDG,1
XEDG,6
*STEP
*BUCKLE
3,
*TEMPERATURE
TEMP,100.
*EL PRINT,ELSET=EPRINT
S,
*MODAL FILE
*END STEP